A 55-year-old man is brought to the emergency room by his roommate due to an abdominal pain that started 2 hours ago. His pain is dull, aching, and radiates to the back. He admits to binge drinking alcohol for the past 2 days. Past medical history is significant for multiple admissions to the hospital for similar abdominal pain events, hypertension, and hyperlipidemia. He takes chlorthalidone and atorvastatin. He admits to heavy alcohol consumption over the past 10 years. He has smoked a pack of cigarettes a day for the last 20 years. In the emergency department, his temperature is 38.9℃ (102.0℉), pulse rate is 100/min, and respiratory rate is 28/min. On physical examination, he looks generally unwell and diaphoretic. Auscultation of his heart and lungs reveals an elevated heart rate with a regular rhythm. His lungs are clear to auscultation bilaterally. His abdomen is tympanitic with generalized tenderness. Evaluation of lab values reveals a leukocyte count of 28,000/mm3 with 89% of neutrophils. His amylase level is 255 U/L. A CT scan of the abdomen shows the diffuse enlargement of the pancreas. Which pathological process is most likely occurring in this patient’s peripancreatic tissue?
Q2
A 50-year-old Caucasian man is admitted to the ER with an 8-hour history of intense abdominal pain that radiates to the back, nausea, and multiple episodes of vomiting. Past medical history is insignificant. His blood pressure is 90/60 mm Hg, pulse is 120/min, respirations are 20/min, and body temperature is 37.8°C (100°F). Upon examination, he has significant epigastric tenderness, and hypoactive bowel sounds. Serum lipase and amylase are elevated and the patient rapidly deteriorates, requiring transfer to the intensive care unit for a month. After being stabilized, he is transferred to the general medicine floor with an abdominal computed tomography (CT) reporting a well-circumscribed collection of fluid of homogeneous density. Which of the following best describes the condition this patient has developed?
Q3
A 27-year-old school teacher visits her doctor because of disfiguring skin lesions that started to appear in the past few days. The lesions are mostly located on her chest, shoulders, and back. They are 2–5 mm in diameter, droplike, erythematous papules with fine silver scales. Besides a sore throat and laryngitis requiring amoxicillin several weeks ago, she has no significant medical history. What is the most likely diagnosis?
Q4
A 29-year-old man presents to the clinic complaining of fatigue and loss of sensation in his lower legs. The patient notes no history of trauma or chronic disease but states that he spends a lot of time outside and often encounters wild animals. On examination, the patient has multiple dark lesions over the skin of his face and back, as well as a decreased sensation of fine touch and vibration bilaterally in the lower extremities. What is the morphology of the etiologic agent causing this patient’s symptoms?
Q5
A 22-year-old woman presents with multiple tender, erythematous nodules on her shins that developed over the past week. She reports having a sore throat 2 weeks ago. She also complains of joint pain and fatigue. Physical examination reveals raised, red, tender nodules on the anterior surface of both legs. Her temperature is 38.2°C. Which of the following is the most likely diagnosis?
Q6
A 50-year-old female presents to her physician with vesicles and tense blisters across her chest, arms, and the back of her shoulders. Physical examination reveals that blistering is not present in her oral mucosa, and the epidermis does not separate upon light stroking of the skin. The patient most likely suffers from a hypersensitivity reaction located:
Q7
A 54-year-old man comes to the physician because of a cough with blood-tinged sputum for 1 week. He also reports fever and a 5-kg (11 lb) weight loss during the past 2 months. Over the past year, he has had 4 episodes of sinusitis. Physical examination shows palpable nonblanching skin lesions over the hands and feet. Examination of the nasal cavity shows ulceration of the nasopharyngeal mucosa and a depressed nasal bridge. Oral examination shows a painful erythematous gingival enlargement that bleeds easily on contact. Which of the following is the most likely cause of the patient's symptoms?
Q8
A 37-year-old woman presents to the occupational health clinic for a new employee health screening. She has limited medical records prior to her immigration to the United States several years ago. She denies any current illness or significant medical history. Purified protein derivative (PPD) is injected on the inside of her left forearm for tuberculosis (TB) screening. Approximately 36 hours later, the patient comes back to the occupational health clinic and has an indurated lesion with bordering erythema measuring 15 mm in diameter at the site of PPD injection. Of the following options, which is the mechanism of her reaction?
Q9
A 50-year-old woman with rheumatoid arthritis on methotrexate develops rapidly progressive painful ulcers on her legs with violaceous undermined borders. Biopsy shows neutrophilic dermal infiltrate with areas of necrosis, but no vasculitis or infection. Wound cultures are negative. Despite debridement, the ulcers worsen. C-ANCA and P-ANCA are negative. Evaluate the diagnosis and determine the management that addresses both the cutaneous condition and systemic disease.
Q10
A 25-year-old woman presents with painful oral ulcers and a pustular rash at venipuncture sites. She has genital ulcers and a history of recurrent uveitis. Skin biopsy from a pustule shows neutrophilic infiltrate in the dermis without vasculitis or infection. HLA-B51 testing is positive. She is planning pregnancy. Evaluate the management strategy considering disease control and pregnancy planning.
Panniculitis US Medical PG Practice Questions and MCQs
Question 1: A 55-year-old man is brought to the emergency room by his roommate due to an abdominal pain that started 2 hours ago. His pain is dull, aching, and radiates to the back. He admits to binge drinking alcohol for the past 2 days. Past medical history is significant for multiple admissions to the hospital for similar abdominal pain events, hypertension, and hyperlipidemia. He takes chlorthalidone and atorvastatin. He admits to heavy alcohol consumption over the past 10 years. He has smoked a pack of cigarettes a day for the last 20 years. In the emergency department, his temperature is 38.9℃ (102.0℉), pulse rate is 100/min, and respiratory rate is 28/min. On physical examination, he looks generally unwell and diaphoretic. Auscultation of his heart and lungs reveals an elevated heart rate with a regular rhythm. His lungs are clear to auscultation bilaterally. His abdomen is tympanitic with generalized tenderness. Evaluation of lab values reveals a leukocyte count of 28,000/mm3 with 89% of neutrophils. His amylase level is 255 U/L. A CT scan of the abdomen shows the diffuse enlargement of the pancreas. Which pathological process is most likely occurring in this patient’s peripancreatic tissue?
A. Fat necrosis (Correct Answer)
B. Caseous necrosis
C. Fibrinoid necrosis
D. Coagulative necrosis
E. Liquefactive necrosis
Explanation: ***Fat necrosis***
- This patient presents with **acute pancreatitis**, characterized by severe epigastric pain radiating to the back, elevated amylase, and diffuse pancreatic enlargement on CT, all exacerbated by **binge drinking**.
- In acute pancreatitis, activated pancreatic enzymes, particularly **lipases**, leak into the peripancreatic fat, causing enzymatic breakdown of fat into fatty acids, which then combine with calcium to form **calcium soaps** (saponification), clinically recognizable as fat necrosis.
*Caseous necrosis*
- This type of necrosis is typically associated with **tuberculosis** and fungal infections, forming a cheesy, crumbly appearance.
- It involves a granulomatous inflammatory response and does not align with the enzyme-driven fat breakdown seen in pancreatitis.
*Fibrinoid necrosis*
- This is a vascular injury characterized by the deposition of **fibrin-like material** in arterial walls, often seen in immune-mediated vasculitis or severe hypertension.
- It is not a primary pathological process in the peripancreatic tissue during acute pancreatitis.
*Coagulative necrosis*
- This form of necrosis is characteristic of **ischemic injury** in most solid organs (e.g., heart, kidney) where the cellular architecture is preserved for some time.
- While pancreatic necrosis can occur, the specific breakdown of peripancreatic fat by lipases leads to fat necrosis, not coagulative necrosis of the fat itself.
*Liquefactive necrosis*
- This type of necrosis occurs in tissues rich in hydrolytic enzymes and low in structural proteins, such as the **brain after ischemia** or in **abscesses**.
- While pancreatic tissue undergoing severe necrosis can exhibit liquefaction, the specific process affecting the surrounding fat in pancreatitis is fat necrosis due to lipase activity.
Question 2: A 50-year-old Caucasian man is admitted to the ER with an 8-hour history of intense abdominal pain that radiates to the back, nausea, and multiple episodes of vomiting. Past medical history is insignificant. His blood pressure is 90/60 mm Hg, pulse is 120/min, respirations are 20/min, and body temperature is 37.8°C (100°F). Upon examination, he has significant epigastric tenderness, and hypoactive bowel sounds. Serum lipase and amylase are elevated and the patient rapidly deteriorates, requiring transfer to the intensive care unit for a month. After being stabilized, he is transferred to the general medicine floor with an abdominal computed tomography (CT) reporting a well-circumscribed collection of fluid of homogeneous density. Which of the following best describes the condition this patient has developed?
A. Acute necrotic collection
B. Fistula formation
C. Walled-off necrosis
D. Pancreatic pseudocyst (Correct Answer)
E. Pancreatic cancer
Explanation: ***Pancreatic pseudocyst***
- The patient experienced an episode of **severe acute pancreatitis**, followed by the development of a well-circumscribed collection of fluid with homogeneous density, which is characteristic of a **pancreatic pseudocyst**.
- **Pseudocysts** are collections of pancreatic fluid and inflammatory exudates that become encapsulated by a fibrous wall, typically appearing around 4 weeks after an episode of acute pancreatitis.
*Acute necrotic collection*
- An **acute necrotic collection** is an early phase (within 4 weeks) of peripancreatic fluid collection that contains both fluid and non-viable pancreatic or peripancreatic tissue, which is not described as homogeneous in density.
- This term usually refers to the initial, unorganized collection of necrotic material, prior to the development of a well-defined wall.
*Fistula formation*
- **Fistula formation** involves an abnormal connection between two epithelialized organs or between an organ and the skin, which is not described by a well-circumscribed fluid collection.
- While it can be a complication of pancreatitis, the CT finding of a homogeneous fluid collection does not directly indicate a fistula.
*Walled-off necrosis*
- **Walled-off necrosis (WON)** is a mature collection (typically >4 weeks) of pancreatic and/or peripancreatic necrotic tissue that has developed a well-defined inflammatory wall but contains a significant solid/necrotic component.
- The CT description of a "homogeneous density" fluid collection does not align with WON, which would typically show heterogeneous density due to solid necrotic debris.
*Pancreatic cancer*
- **Pancreatic cancer** is an abnormal growth of cells within the pancreas and would typically present as a mass lesion, often with tissue invasion.
- While a pseudocyst can sometimes mimic a cystic tumor, the history of acute pancreatitis and the specific CT description of a homogeneous fluid collection make pancreatic cancer less likely in this context.
Question 3: A 27-year-old school teacher visits her doctor because of disfiguring skin lesions that started to appear in the past few days. The lesions are mostly located on her chest, shoulders, and back. They are 2–5 mm in diameter, droplike, erythematous papules with fine silver scales. Besides a sore throat and laryngitis requiring amoxicillin several weeks ago, she has no significant medical history. What is the most likely diagnosis?
A. Bullous pemphigoid
B. Plaque psoriasis
C. Pemphigus vulgaris
D. Guttate psoriasis (Correct Answer)
E. Inverse psoriasis
Explanation: ***Guttate psoriasis***
- This condition is characterized by **acute onset** of **small (2–5 mm)**, **droplike**, erythematous papules with **fine silver scales**, predominantly on the trunk.
- It often follows an **upper respiratory tract infection**, particularly with *Streptococcus pyogenes*, as indicated by the recent **sore throat and laryngitis** requiring amoxicillin.
*Bullous pemphigoid*
- This autoimmune blistering disease primarily affects the **elderly** and presents with large, **tense bullae** on an erythematous or urticarial base.
- It does not typically present with small, scaly papules or have a direct association with recent streptococcal infections.
*Plaque psoriasis*
- The most common type of psoriasis, presenting with **well-demarcated**, erythematous plaques covered by **thick, silvery scales**, usually larger than 5 mm.
- While it can be found on the trunk, its lesions are typically larger and chronologically more stable than the acute, droplike lesions described.
*Pemphigus vulgaris*
- This is a severe autoimmune blistering disease characterized by **flaccid bullae** and erosions on the skin and **mucous membranes**.
- It involves intraepidermal blistering due to acantholysis and is not associated with recent sore throat or small, scaly papules.
*Inverse psoriasis*
- This form of psoriasis affects **skin folds** (e.g., axillae, groin, inframammary regions) and presents as **smooth, erythematous plaques** without significant scaling due to moisture.
- Its location and lack of typical scaling differ from the described lesions on the chest, shoulders, and back.
Question 4: A 29-year-old man presents to the clinic complaining of fatigue and loss of sensation in his lower legs. The patient notes no history of trauma or chronic disease but states that he spends a lot of time outside and often encounters wild animals. On examination, the patient has multiple dark lesions over the skin of his face and back, as well as a decreased sensation of fine touch and vibration bilaterally in the lower extremities. What is the morphology of the etiologic agent causing this patient’s symptoms?
A. An acid-fast, intracellular bacillus (Correct Answer)
B. Reactivation of latent viral infection
C. Maltose-fermenting gram-negative diplococci
D. A spirochete transmitted via tick
E. Gram-positive, branching anaerobe
Explanation: ***An acid-fast, intracellular bacillus***
- The patient's symptoms (fatigue, loss of sensation in lower legs, dark skin lesions, exposure to wild animals, and decreased fine touch/vibration) are highly suggestive of **leprosy** (Hansen's disease).
- Leprosy is caused by **_Mycobacterium leprae_**, which is an **acid-fast, obligate intracellular bacillus** that preferentially infects macrophages and Schwann cells, leading to nerve damage and skin lesions.
*Reactivation of latent viral infection*
- While viral infections can cause neurological symptoms, the presentation with specific **dark skin lesions** and the history of exposure to **wild animals** (potentially armadillos, a reservoir for _M. leprae_) point away from a common latent viral reactivation.
- **Herpes zoster** (shingles) is a common reactivation of a latent viral infection (varicella-zoster virus), but it typically presents with a dermatomal rash and neuropathic pain rather than widespread dark lesions and bilateral sensory loss in the lower extremities.
*Maltose-fermenting gram-negative diplococci*
- **Maltose-fermenting gram-negative diplococci** describe **_Neisseria meningitidis_**, which causes meningitis.
- This organism primarily causes symptoms related to meningitis (fever, headache, neck stiffness), and does not typically present with the chronic sensory loss or characteristic skin lesions seen in this patient.
*A spirochete transmitted via tick*
- A **spirochete transmitted via a tick** refers to **_Borrelia burgdorferi_**, the causative agent of **Lyme disease**.
- Lyme disease presents with an **erythema migrans rash** (bull's-eye rash), joint pain, and neurological symptoms, but the skin lesions described here (multiple dark lesions) and the progressive sensory loss are not typical for Lyme disease.
*Gram-positive, branching anaerobe*
- A **gram-positive, branching anaerobe** describes **_Actinomyces_ species**, which cause **actinomycosis**.
- Actinomycosis typically presents with chronic abscesses and sinus tracts, often affecting the head and neck, thorax, or abdomen, and does not cause the diffuse sensory loss or skin lesions described in this case.
Question 5: A 22-year-old woman presents with multiple tender, erythematous nodules on her shins that developed over the past week. She reports having a sore throat 2 weeks ago. She also complains of joint pain and fatigue. Physical examination reveals raised, red, tender nodules on the anterior surface of both legs. Her temperature is 38.2°C. Which of the following is the most likely diagnosis?
A. Cellulitis
B. Erythema nodosum (Correct Answer)
C. Sweet syndrome
D. Superficial thrombophlebitis
Explanation: ***Erythema nodosum***
- The presentation of **tender, erythematous nodules on the shins**, following a preceding **sore throat**, with associated **joint pain and fatigue**, is highly characteristic of **erythema nodosum**.
- It is a form of **panniculitis** typically triggered by infections (e.g., streptococcal pharyngitis), medications, or systemic diseases.
*Cellulitis*
- Characterized by a **warm, erythematous, swollen area** with poorly defined borders, often accompanied by pain and fever, but typically presents as a diffuse skin infection rather than distinct nodules.
- While fever is present, the **nodular nature** of the lesions and their bilateral, symmetrical distribution are less consistent with cellulitis.
*Sweet syndrome*
- Also known as acute febrile neutrophilic dermatosis, it presents with **tender erythematous plaques or nodules** and **fever**, but typically has a more prominent **neutrophilic infiltrate** histologically.
- Lesions of Sweet syndrome often appear on the **upper extremities, face, or neck**, and while it can affect the shins, the clinical picture here is more classic for erythema nodosum, especially given the history of sore throat.
*Superficial thrombophlebitis*
- Presents as a **palpable, tender, erythematous cord** along the course of a superficial vein, often with localized swelling and warmth.
- The lesions are typically **linear or cord-like**, not discrete nodules scattered over the shins, and are directly related to a thrombosed vein.
Question 6: A 50-year-old female presents to her physician with vesicles and tense blisters across her chest, arms, and the back of her shoulders. Physical examination reveals that blistering is not present in her oral mucosa, and the epidermis does not separate upon light stroking of the skin. The patient most likely suffers from a hypersensitivity reaction located:
A. Linearly along the epidermal basement membrane (Correct Answer)
B. In fat cells beneath the skin
C. In nuclei within epidermal cells
D. In net-like patterns around epidermal cells
E. In granular deposits at the tips of dermal papillae
Explanation: ***Linearly along the epidermal basement membrane***
- The description of **tense blisters** and the absence of **Nikolsky's sign** (no epidermal separation with light stroking) are characteristic features of **bullous pemphigoid**.
- **Bullous pemphigoid** is an autoimmune disease where autoantibodies target components of the **hemidesmosomes** located along the **epidermal basement membrane**, leading to subepidermal blistering.
*In fat cells beneath the skin*
- This description is not consistent with any common blistering disorder, and **fat cells** (adipocytes) are not primary targets for blistering in autoimmune diseases.
- Blistering disorders typically involve the epidermis or the dermal-epidermal junction, not the subcutaneous fat.
*In nuclei within epidermal cells*
- Autoantibodies targeting **nuclear antigens** are associated with conditions like **lupus erythematosus**, but this generally leads to characteristic skin rashes, not tense blistering.
- Blistering from nuclear involvement is uncommon and does not match the clinical presentation of bullous pemphigoid or pemphigus.
*In net-like patterns around epidermal cells*
- This pattern of antibody deposition is characteristic of **pemphigus vulgaris**, where autoantibodies target **desmogleins** in the intercellular spaces of the epidermis.
- Pemphigus vulgaris typically presents with **flaccid blisters** that are easily rupturable, and often involves the **oral mucosa**, in contrast to the patient's presentation.
*In granular deposits at the tips of dermal papillae*
- This pattern of IgA deposition, particularly in a granular fashion at the **dermal papillae tips**, is characteristic of **dermatitis herpetiformis**.
- Dermatitis herpetiformis typically presents with **pruritic papules and vesicles**, often on extensor surfaces, and is commonly associated with **celiac disease**, which is not indicated here.
Question 7: A 54-year-old man comes to the physician because of a cough with blood-tinged sputum for 1 week. He also reports fever and a 5-kg (11 lb) weight loss during the past 2 months. Over the past year, he has had 4 episodes of sinusitis. Physical examination shows palpable nonblanching skin lesions over the hands and feet. Examination of the nasal cavity shows ulceration of the nasopharyngeal mucosa and a depressed nasal bridge. Oral examination shows a painful erythematous gingival enlargement that bleeds easily on contact. Which of the following is the most likely cause of the patient's symptoms?
A. Metalloprotease enzyme deficiency
B. Malignant myeloid cell proliferation
C. Arteriovenous malformation
D. Immune complex deposition
E. Neutrophil-mediated damage (Correct Answer)
Explanation: ***Neutrophil-mediated damage***
- The constellation of **sinusitis**, **pulmonary symptoms** (cough with blood-tinged sputum), **renal involvement** (indicated by systemic symptoms and often associated with microhematuria in this condition), and **skin lesions (palpable purpura)**, along with **nasal ulceration**, a **depressed nasal bridge**, and **gingival enlargement**, is highly characteristic of **Granulomatosis with Polyangiitis (GPA)**.
- GPA is an **ANCA-associated vasculitis** characterized by **necrotizing granulomatous inflammation** and **vasculitis** of small to medium-sized vessels, primarily driven by **neutrophil activation** and subsequent tissue damage.
*Metalloprotease enzyme deficiency*
- This description commonly refers to conditions like **alpha-1 antitrypsin deficiency**, which primarily causes **emphysema** and liver disease, not the widespread vasculitic manifestations seen here.
- It does not explain the diverse multi-organ involvement including skin, ENT, and likely renal symptoms.
*Malignant myeloid cell proliferation*
- This would suggest conditions like **leukemia** or **myelodysplastic syndromes**, which present with altered blood counts, fatigue, infections, and bleeding, but typically not this specific pattern of vasculitis and granulomatous inflammation.
- While constitutional symptoms like weight loss can occur, the localized findings like depressed nasal bridge and gingival enlargement are not characteristic.
*Arteriovenous malformation*
- An **arteriovenous malformation (AVM)** is an abnormal connection between arteries and veins; depending on its location, it can cause bleeding (e.g., hemoptysis if pulmonary) or neurological symptoms if cerebral.
- However, AVMs do not explain the systemic inflammatory symptoms, skin lesions, sinusitis, depressed nasal bridge, or gingival changes.
*Immune complex deposition*
- **Immune complex vasculitis** (e.g., IgA vasculitis, cryoglobulinemic vasculitis) often presents with palpable purpura and can affect kidneys and GI tract.
- However, the prominent **granulomatous inflammation** causing **nasal ulceration** and **depressed nasal bridge**, and the specific type of **pulmonary-renal syndrome** seen in GPA, are more indicative of **ANCA-mediated neutrophil damage** rather than immune complex deposition.
Question 8: A 37-year-old woman presents to the occupational health clinic for a new employee health screening. She has limited medical records prior to her immigration to the United States several years ago. She denies any current illness or significant medical history. Purified protein derivative (PPD) is injected on the inside of her left forearm for tuberculosis (TB) screening. Approximately 36 hours later, the patient comes back to the occupational health clinic and has an indurated lesion with bordering erythema measuring 15 mm in diameter at the site of PPD injection. Of the following options, which is the mechanism of her reaction?
A. Type III and IV–mixed immune complex and cell-mediated hypersensitivity reactions
B. Type III–immune complex-mediated hypersensitivity reaction
C. Type I–anaphylactic hypersensitivity reaction
D. Type II–cytotoxic hypersensitivity reaction
E. Type IV–cell-mediated (delayed) hypersensitivity reaction (Correct Answer)
Explanation: ***Type IV–cell-mediated (delayed) hypersensitivity reaction***
- The **PPD test** for tuberculosis is a classic example of a **Type IV hypersensitivity reaction**, also known as **delayed-type hypersensitivity (DTH)**. This reaction is orchestrated by **T lymphocytes** (specifically CD4+ T cells) that recognize antigens presented by antigen-presenting cells
- The **induration** at 36 hours is a hallmark of this type of reaction, as it typically peaks between **24 to 72 hours** after antigen exposure, reflecting the time required for T cells to migrate to the site and initiate an inflammatory response. The immune response involves the release of **cytokines** leading to macrophage accumulation and localized tissue damage.
*Type III and IV–mixed immune complex and cell-mediated hypersensitivity reactions*
- While immune complexes (Type III) and cell-mediated reactions (Type IV) can both lead to tissue damage, a PPD test is primarily a **cell-mediated response** and is not characterized by significant immune complex deposition.
- Mixed reactions are less common and usually involve a sustained presence of antigen leading to both types of responses, which is not the typical mechanism for an acute PPD skin test.
*Type III–immune complex-mediated hypersensitivity reaction*
- **Type III hypersensitivity** is characterized by the formation of **antigen-antibody immune complexes** that deposit in tissues, leading to inflammation and tissue damage, often seen in conditions like serum sickness or lupus nephritis.
- The PPD reaction is based on T-cell recognition of mycobacterial antigens, not the deposition of soluble antigen-antibody complexes.
*Type I–anaphylactic hypersensitivity reaction*
- **Type I hypersensitivity** is an **immediate allergic reaction** mediated by **IgE antibodies** binding to mast cells and basophils, leading to histamine release upon re-exposure to an allergen.
- This type of reaction typically occurs within minutes of exposure, not 36 hours later, and presents with symptoms like hives, angioedema, or anaphylaxis.
*Type II–cytotoxic hypersensitivity reaction*
- **Type II hypersensitivity** involves **antibodies (IgG or IgM)** binding to antigens on the surface of **host cells**, leading to cell lysis or dysfunction, often seen in transfusion reactions or autoimmune hemolytic anemia.
- The PPD test does not involve direct antibody-mediated destruction of host cells.
Question 9: A 50-year-old woman with rheumatoid arthritis on methotrexate develops rapidly progressive painful ulcers on her legs with violaceous undermined borders. Biopsy shows neutrophilic dermal infiltrate with areas of necrosis, but no vasculitis or infection. Wound cultures are negative. Despite debridement, the ulcers worsen. C-ANCA and P-ANCA are negative. Evaluate the diagnosis and determine the management that addresses both the cutaneous condition and systemic disease.
A. Discontinue all immunosuppression to allow wound healing
B. Increase methotrexate dose and add wound care
C. Discontinue methotrexate, start cyclosporine and prednisone
D. Start broad-spectrum antibiotics and surgical debridement
E. Continue methotrexate, add TNF-alpha inhibitor and systemic corticosteroids (Correct Answer)
Explanation: ***Continue methotrexate, add TNF-alpha inhibitor and systemic corticosteroids***
- This patient presents with **Pyoderma Gangrenosum (PG)**, a neutrophilic dermatosis characterized by **violaceous undermined borders** and **pathergy**, where surgical debridement cause lesion expansion.
- **TNF-alpha inhibitors** (e.g., adalimumab, infliximab) are first-line for recalcitrant PG and simultaneously provide excellent control for the underlying **Rheumatoid Arthritis**.
*Discontinue all immunosuppression to allow wound healing*
- Since PG is an **autoimmune inflammatory condition**, withdrawing immunosuppression would result in rapid progression of the ulcers rather than healing.
- Wound healing in PG requires **suppressing the inflammatory response** rather than the typical wound care approach for infected ulcers.
*Increase methotrexate dose and add wound care*
- While **methotrexate** treats RA, it is often insufficient as a monotherapy for the acute, rapidly progressive phase of **Pyoderma Gangrenosum**.
- Standard wound care alone is ineffective because the primary driver is **neutrophilic infilatration**, which requires targeted biologic or corticosteroid therapy.
*Discontinue methotrexate, start cyclosporine and prednisone*
- While **cyclosporine** and **prednisone** are used for PG, discontinuing methotrexate may lead to a flare of the patient’s **Rheumatoid Arthritis**.
- Maintaining a coordinated regimen that addresses both the skin and the joints, such as adding a **TNF-alpha inhibitor**, is preferred over switching all medications.
*Start broad-spectrum antibiotics and surgical debridement*
- **Surgical debridement** is contraindicated in PG due to **pathergy**, a phenomenon where trauma to the skin induces new or worsening lesions.
- **Antibiotics** are unnecessary as the biopsy and cultures confirmed a **sterile neutrophilic infiltrate** rather than an infectious process.
Question 10: A 25-year-old woman presents with painful oral ulcers and a pustular rash at venipuncture sites. She has genital ulcers and a history of recurrent uveitis. Skin biopsy from a pustule shows neutrophilic infiltrate in the dermis without vasculitis or infection. HLA-B51 testing is positive. She is planning pregnancy. Evaluate the management strategy considering disease control and pregnancy planning.
A. Start methotrexate for disease control
B. Start colchicine monotherapy and proceed with pregnancy
C. Start high-dose corticosteroids and azathioprine, delay pregnancy
D. Start infliximab, use contraception, then transition to low-risk therapy before conception (Correct Answer)
E. Avoid all immunosuppression and manage symptoms only
Explanation: ***Start infliximab, use contraception, then transition to low-risk therapy before conception***
- This patient has **Beh'et's disease** with **recurrent uveitis**, which is **sight-threatening** and requires aggressive biological therapy like **infliximab** or **TNF-inhibitors** for rapid remission.
- Achievng **remission** before pregnancy is vital; while TNF-inhibitors are often continued, transitioning to pregnancy-compatible agents like **azathioprine** or **colchicine** ensures long-term safety.
*Start methotrexate for disease control*
- **Methotrexate** is strictly **teratogenic** and must be avoided in patients planning pregnancy or discontinued months before conception.
- While it can treat some aspects of systemic inflammation, it is not the first-line gold standard for **acute ocular Beh'et's** compared to biologics.
*Start colchicine monotherapy and proceed with pregnancy*
- **Colchicine** is excellent for **mucocutaneous** symptoms (oral and genital ulcers) but is insufficient as monotherapy to prevent blindness from **recurrent uveitis**.
- Relying on monotherapy in a patient with active ocular disease risks **permanent vision loss** during the pregnancy period.
*Start high-dose corticosteroids and azathioprine, delay pregnancy*
- While **azathioprine** is used for maintenance, **high-dose corticosteroids** carry significant side effects and are usually a bridge, not a comprehensive plan for ocular stabilization.
- This strategy lacks the rapid, potent **TNF-alpha inhibition** needed to quickly arrest the neutrophilic inflammation seen in severe Beh'et's flare-ups.
*Avoid all immunosuppression and manage symptoms only*
- **Beh'et's disease** is a multi-system inflammatory disorder; leaving **uveitis** and systemic vasculitis untreated leads to irreversible organ damage and **blindness**.
- Symptomatic management alone ignores the **neutrophilic infiltrate** and underlying autoimmune process, which could also lead to pregnancy complications due to active maternal disease.
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