Dermatopathology — MCQs
On this page
A 74-year-old woman has noted increasing size and number of darker brown patches on the dorsum of each hand for the past 15 years. They do not change with sun exposure, are nonpruritic, and non-tender. On examination, these 0.5- to 1-cm lightly pigmented lesions are flat. Which of the following is the most likely microscopic finding in these lesions?
Which of the following is NOT true about dysplastic nevus syndrome?
A 66-year-old woman presents with a 6-month history of scaling and abnormal pigmentation of the skin. Her past medical history is significant for the treatment of thyroid cancer 1 year ago. Biopsy of lesional skin shows atrophy of the epidermis and dense fibrosis of the dermis, which displays dilated superficial blood vessels. These pathologic findings are most likely caused by previous exposure to which of the following?
Which of the following is a melanocytic marker?
What is the histologic hallmark of Langerhans cells?
Which of the following lesions are seen in von Recklinghausen's disease of the skin?
What is the characteristic histological feature of basal cell carcinoma?
Pautriers microabscess is seen in which of the following conditions?
What is the characteristic shape of Birbeck granules?
Which of the following is NOT true regarding the histopathology of psoriasis?
Dermatopathology Indian Medical PG Practice Questions and MCQs
Question 1: A 74-year-old woman has noted increasing size and number of darker brown patches on the dorsum of each hand for the past 15 years. They do not change with sun exposure, are nonpruritic, and non-tender. On examination, these 0.5- to 1-cm lightly pigmented lesions are flat. Which of the following is the most likely microscopic finding in these lesions?
- A. Basal melanocytic hyperplasia (Correct Answer)
- B. Dermal nevus cells
- C. Loss of melanin in surrounding skin
- D. Mast cell proliferation
Explanation: **Explanation:** The clinical presentation describes **Solar Lentigo** (also known as "liver spots" or "senile lentigo"). These are common, benign, pigmented macules occurring in elderly individuals on sun-exposed areas like the dorsum of the hands and face. **1. Why "Basal Melanocytic Hyperplasia" is correct:** The hallmark of solar lentigo is a **linear (non-nested) hyperplasia of melanocytes** along the basal layer of the epidermis [1]. This is often accompanied by "dirty socks" appearance—elongated, club-shaped rete ridges with increased melanin pigmentation in the basal keratinocytes [1]. Unlike freckles (ephelides), where the number of melanocytes is normal but melanin production is increased, lentigines show a true increase in the number of melanocytes. **2. Why other options are incorrect:** * **Dermal nevus cells:** This describes a **Dermal Melanocytic Nevus** [3]. These are typically raised (papular) lesions [2], whereas the question describes flat (macular) lesions [2]. * **Loss of melanin:** This is characteristic of **Vitiligo** or **Pityriasis alba**, which present as hypopigmented or depigmented patches, not dark brown lesions. * **Mast cell proliferation:** This is the feature of **Urticaria Pigmentosa** (Mastocytosis). These lesions typically exhibit "Darier’s sign" (wheal formation upon stroking), which is absent here. **High-Yield Clinical Pearls for NEET-PG:** * **Lentigo vs. Ephelis (Freckle):** Lentigines do *not* darken with sun exposure and have increased melanocyte counts [1]. Ephelides *do* darken with sun exposure and have a normal melanocyte count but increased melanosomes. * **Lentigo Maligna:** A subtype of melanoma in situ found on sun-damaged skin; it shows atypical melanocytes, unlike the benign hyperplasia seen in solar lentigo. * **Key Histology:** Look for "club-shaped" or "bud-like" extensions of the rete ridges in solar lentigo [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1148-1150. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 631-633. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1146-1148.
Question 2: Which of the following is NOT true about dysplastic nevus syndrome?
- A. It is inherited in an autosomal recessive pattern. (Correct Answer)
- B. Approximately half of such patients develop melanoma by age 60.
- C. It is associated with mutations in BRAF and NRAS.
- D. It is a disorder characterized by numerous dysplastic nevi.
Explanation: **Explanation:** **Dysplastic Nevus Syndrome (DNS)**, also known as Familial Atypical Multiple Mole Melanoma (FAMMM) syndrome, is a critical topic in dermatopathology due to its high association with malignancy. **1. Why Option A is the Correct Answer (The False Statement):** Dysplastic Nevus Syndrome is inherited in an **autosomal dominant** pattern, not recessive [1]. It is primarily associated with germline mutations in the **CDKN2A gene** (located on chromosome 9p21), which encodes for p16/INK4a, a potent tumor suppressor that regulates the cell cycle [2]. **2. Analysis of Other Options:** * **Option B:** Patients with DNS have a significantly elevated lifetime risk of developing cutaneous melanoma. In familial cases, the penetrance is high, with approximately **50% to nearly 100%** of affected individuals developing melanoma by age 60 [1]. * **Option C:** While CDKN2A is the germline driver, the progression of these nevi to melanoma often involves acquired somatic mutations in the **MAPK pathway**, specifically **BRAF** (V600E) and **NRAS** mutations [2]. * **Option D:** Clinically, the syndrome is defined by the presence of **numerous (often >50-100)** atypical nevi [3]. These moles are typically larger (>6mm), have variegated colors, and irregular borders [3]. **Clinical Pearls for NEET-PG:** * **Histology:** Look for "bridging" of nests (fusion of adjacent rete ridges), **lamellar fibroplasia** (concentric fibrosis around rete ridges), and subepidermal lymphocytic infiltration. * **ABCDE Rule:** Used for clinical screening (Asymmetry, Border irregularity, Color variegation, Diameter >6mm, Evolving). * **Syndromic Association:** CDKN2A mutations are also linked to an increased risk of **pancreatic cancer**. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, p. 1148. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1150-1151. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1148-1150.
Question 3: A 66-year-old woman presents with a 6-month history of scaling and abnormal pigmentation of the skin. Her past medical history is significant for the treatment of thyroid cancer 1 year ago. Biopsy of lesional skin shows atrophy of the epidermis and dense fibrosis of the dermis, which displays dilated superficial blood vessels. These pathologic findings are most likely caused by previous exposure to which of the following?
- A. Chemotherapy
- B. Corticosteroids
- C. Organic iodine
- D. Radiation therapy (Correct Answer)
Explanation: ### Explanation The clinical presentation and histopathological findings describe **Chronic Radiation Dermatitis**, a late-stage complication of ionizing radiation therapy. **1. Why Radiation Therapy is Correct:** The patient’s history of thyroid cancer treatment (likely external beam radiation or radioactive iodine) is the key trigger. Chronic radiation exposure leads to: * **Epidermal Atrophy:** Loss of the normal rete ridge pattern and thinning of the skin. * **Dermal Fibrosis:** Radiation induces TGF-̢ production, leading to dense, "smudgy" collagen deposition (hyalinization) [1]. * **Telangiectasia:** Dilated superficial blood vessels occur due to permanent damage to the vascular endothelium and subsequent compensatory dilation [1]. * **Pigmentary changes:** Damage to melanocytes results in irregular hyper- or hypopigmentation. **2. Why Other Options are Incorrect:** * **Chemotherapy:** While it can cause skin changes (e.g., hyperpigmentation or hand-foot syndrome), it does not typically cause localized dense dermal fibrosis and telangiectasia. * **Corticosteroids:** Chronic topical use causes epidermal and dermal atrophy and telangiectasia, but it leads to a **loss** of collagen (thinning), not the dense fibrosis seen here. * **Organic Iodine:** Used as a contrast agent or antiseptic; it may cause allergic reactions (iododerma) but not chronic fibrotic skin remodeling. **3. NEET-PG High-Yield Pearls:** * **Radiation Fibroblasts:** Look for large, stellate, atypical-appearing fibroblasts in the dermis (they are "bizarre" but not malignant). * **Vascular Changes:** Acute radiation causes endothelial swelling; chronic radiation causes **endarteritis obliterans** (narrowing of small arteries) [1]. * **Malignancy Risk:** Chronic radiation dermatitis is a precursor to **Squamous Cell Carcinoma** (Marjolin-like ulcer) and **Angiosarcoma**. * **Thyroid Cancer Context:** Post-surgical radiotherapy is common for locally advanced thyroid malignancies. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Central Nervous System Synapse, pp. 437-438.
Question 4: Which of the following is a melanocytic marker?
- A. CD99
- B. HMB-45 (Correct Answer)
- C. NMP-22
- D. CA-125
Explanation: **Explanation:** **HMB-45 (Human Melanoma Black-45)** is a highly specific monoclonal antibody used in immunohistochemistry (IHC) to identify melanocytic lesions [1]. It reacts against **gp100**, a glycoprotein found in the stage II premelanosomes of melanocytes. It is particularly useful in diagnosing malignant melanoma, as it typically stains fetal melanocytes and melanoma cells, but is usually negative in normal adult resting melanocytes and intradermal nevi (except for "blue nevi"). **Analysis of Incorrect Options:** * **CD99 (MIC2):** This is a cell surface glycoprotein and a classic marker for **Ewing’s Sarcoma** and Primitive Neuroectodermal Tumors (PNET). It is also seen in lymphoblastic lymphoma and synovial sarcoma. * **NMP-22 (Nuclear Matrix Protein 22):** This is a tumor marker used primarily in the screening and monitoring of **Bladder Cancer** (Urothelial carcinoma) via urine samples. * **CA-125 (Cancer Antigen 125):** This is a well-known tumor marker for **Ovarian Cancer** (specifically epithelial types like serous cystadenocarcinoma). **High-Yield Clinical Pearls for NEET-PG:** * **Other Melanocytic Markers:** Apart from HMB-45, other high-yield markers include **S-100** (most sensitive but least specific), **Melan-A (MART-1)**, **Tyrosinase**, and **SOX10** (highly sensitive for spindle cell and desmoplastic melanomas). * **HMB-45 Utility:** It is excellent for distinguishing melanoma from other "small round blue cell tumors" or undifferentiated carcinomas [1]. * **Negative Marker:** Remember that **Desmoplastic Melanoma** is often negative for HMB-45 but positive for S-100 and SOX10. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1146-1152.
Question 5: What is the histologic hallmark of Langerhans cells?
- A. Dendritic cell processes
- B. Giant mitochondria
- C. Birbeck granules (Correct Answer)
- D. Eosinophilic granules
Explanation: **Explanation:** **Langerhans cells** are specialized dendritic cells (antigen-presenting cells) primarily located in the stratum spinosum of the epidermis [2]. The histologic hallmark of these cells is the presence of **Birbeck granules**, which are identified via **electron microscopy** [1]. * **Why Birbeck granules is correct:** These are unique, membrane-bound cytoplasmic organelles that exhibit a characteristic **"tennis-tennis racket" appearance** [1]. They feature a rod-like shape with a central linear density and a striated periodicity, often terminating in a vesicular bulb. They contain the protein **langerin (CD207)**, which is involved in the endocytosis of pathogens [1]. * **Why other options are incorrect:** * **Dendritic cell processes:** While Langerhans cells are dendritic, this is a morphological feature shared by many other cells (like melanocytes or neurons) and is not a specific histologic "hallmark." * **Giant mitochondria:** These are seen in certain metabolic or toxic myopathies and oncocytes, but not in Langerhans cells. * **Eosinophilic granules:** These are characteristic of eosinophils or cells undergoing certain types of degeneration; they do not define Langerhans cells. **NEET-PG High-Yield Pearls:** * **Immunohistochemistry (IHC):** Langerhans cells are positive for **S-100**, **CD1a**, and **CD207 (Langerin)**. * **Clinical Correlation:** **Langerhans Cell Histiocytosis (LCH)** is a proliferative disorder where these cells infiltrate various organs [1]. On imaging, it often presents as "punched-out" lytic bone lesions (especially in the skull). * **Origin:** Unlike other epidermal cells, Langerhans cells are derived from the **bone marrow** (monocyte-macrophage lineage). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 629-630. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, p. 1144.
Question 6: Which of the following lesions are seen in von Recklinghausen's disease of the skin?
- A. Hemangioma
- B. Ameloblastoma
- C. Neurofibroma (Correct Answer)
- D. Giant cell fibroma
Explanation: **Explanation:** **Neurofibroma** [1] is the hallmark cutaneous lesion of **von Recklinghausen’s disease**, also known as **Neurofibromatosis Type 1 (NF1)** [2]. This is an autosomal dominant multisystem disorder caused by a mutation in the *NF1* gene on chromosome 17, which encodes the protein **neurofibromin**, a negative regulator of the RAS pathway [1]. Cutaneous neurofibromas are benign nerve sheath tumors composed of a mixture of Schwann cells, fibroblasts, and perineural cells [1]. **Analysis of Incorrect Options:** * **Hemangioma (A):** These are benign vascular tumors (proliferation of blood vessels) not associated with NF1. They are more commonly associated with syndromes like Sturge-Weber or Kasabach-Merritt. * **Ameloblastoma (B):** This is a slow-growing, odontogenic (bone) tumor of the jaw. It is not a feature of von Recklinghausen’s disease. * **Giant cell fibroma (D):** This is a fibrous mucosal lesion, typically found in the oral cavity, and is unrelated to the genetic pathology of NF1. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnostic Criteria for NF1 (Need ≥2):** 1. **6 or more Café-au-lait spots** (greater than 5mm in prepubertal, 15mm in postpubertal). 2. **2 or more Neurofibromas** [1] or one **Plexiform neurofibroma** (bag of worms feel) [1]. 3. **Axillary or inguinal freckling** (Crowe’s sign). 4. **Optic glioma.** 5. **2 or more Lisch nodules** (iris hamartomas). 6. **Distinctive bony lesions** (e.g., sphenoid dysplasia). 7. **First-degree relative** with NF1. * **Pathology:** Neurofibromas often show a "shredded carrot" appearance of collagen bundles on histology [1]. * **Malignancy Risk:** Plexiform neurofibromas have a risk of transforming into **Malignant Peripheral Nerve Sheath Tumors (MPNST)** [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Peripheral Nerves and Skeletal Muscles, pp. 1249-1250. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Peripheral Nerves and Skeletal Muscles, pp. 1248-1249.
Question 7: What is the characteristic histological feature of basal cell carcinoma?
- A. Keratin pearls
- B. Foam cells
- C. Nuclear palisading (Correct Answer)
- D. Psammoma bodies
Explanation: **Explanation:** **Basal Cell Carcinoma (BCC)** is the most common skin cancer, arising from the non-keratinizing cells of the basal layer of the epidermis [1]. The hallmark histological feature is the presence of islands or nests of basaloid cells (cells with high N:C ratio and hyperchromatic nuclei) infiltrating the dermis [1]. The correct answer is **Nuclear Palisading** because the cells at the periphery of these tumor nests arrange themselves in a parallel, fence-like pattern. Additionally, a characteristic **artificial retraction artifact** (clefting) is often seen between the tumor nests and the surrounding stroma due to the loss of hemidesmosomes [1]. **Analysis of Incorrect Options:** * **A. Keratin pearls:** These are concentric layers of squamous cells with central keratinization, characteristic of **Squamous Cell Carcinoma (SCC)**, not BCC [2]. * **B. Foam cells:** These are lipid-laden macrophages typically seen in **Xanthomas** or certain inflammatory conditions, but not in BCC. * **C. Psammoma bodies:** These are laminated, concentric calcifications found in specific tumors like **Papillary thyroid carcinoma, Serous cystadenocarcinoma of the ovary, and Meningioma.** **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Face (specifically above the line joining the tragus to the angle of the mouth). * **Clinical presentation:** A pearly papule with telangiectasia or a "rodent ulcer" [1]. * **Risk factors:** UV light exposure and mutations in the **PTCH1 gene** (Hedgehog signaling pathway) [1]. * **Gorlin Syndrome:** Also known as Nevoid Basal Cell Carcinoma Syndrome; characterized by multiple BCCs, odontogenic keratocysts, and bifid ribs [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1160-1162. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Disorders Involving Inflammatory And Haemopoietic Cells, pp. 643-644.
Question 8: Pautriers microabscess is seen in which of the following conditions?
- A. Psoriasis
- B. Mycosis fungoides (Correct Answer)
- C. Lichen planus
- D. Leprosy
Explanation: **Explanation:** **Pautrier’s microabscess** is the hallmark histopathological feature of **Mycosis Fungoides (MF)**, the most common type of Cutaneous T-cell Lymphoma (CTCL) [1]. 1. **Why Mycosis Fungoides is correct:** In MF, malignant T-helper cells (CD4+) exhibit **epidermotropism**, meaning they migrate into the epidermis without significant spongiosis (edema) [2]. When these atypical lymphocytes (often showing "cerebriform" or convoluted nuclei) aggregate into small, distinct clusters within the epidermis, they form **Pautrier’s microabscesses** [1]. This is a diagnostic finding in the plaque and tumor stages of the disease. 2. **Why the other options are incorrect:** * **Psoriasis:** Characterized by **Munro’s microabscesses** (collections of neutrophils in the stratum corneum) and **Kogoj’s pustules** (neutrophils in the stratum spinosum), not lymphocytic clusters. * **Lichen Planus:** Features a "saw-tooth" appearance of rete ridges and **Civatte bodies** (apoptotic keratinocytes), with a band-like lymphocytic infiltrate at the dermo-epidermal junction, but no intraepidermal microabscesses. * **Leprosy:** Characterized by granulomatous inflammation (Grenz zone in lepromatous; perineural inflammation in tuberculoid), but does not involve epidermal microabscesses. **High-Yield Clinical Pearls for NEET-PG:** * **Cell Type:** The cells in Pautrier’s microabscess are **malignant T-cells**, not neutrophils [1]. * **Sezary Syndrome:** The leukemic variant of MF, characterized by the triad of erythroderma, lymphadenopathy, and circulating atypical lymphocytes (**Sezary cells**) [3]. * **Histology Tip:** Look for "lining up" of atypical lymphocytes along the basal layer of the epidermis (tagging). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 564-565. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, p. 1162. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 613-614.
Question 9: What is the characteristic shape of Birbeck granules?
- A. Hockey stick
- B. Bat
- C. Ball
- D. Tennis racket (Correct Answer)
Explanation: **Explanation:** **Birbeck granules** are the pathognomonic ultrastructural hallmark of **Langerhans cells** [1]. Under an electron microscope, these organelles appear as rod-shaped structures with a central striated line and a terminal bulbous expansion, giving them a classic **tennis racket** appearance [1]. They are formed by the invagination of the cell membrane and are involved in the endocytosis and trafficking of the protein **Langerin (CD207)** [1]. **Analysis of Options:** * **Tennis racket (Correct):** This is the definitive description used in pathology to describe the morphology of Birbeck granules [1]. * **Hockey stick:** While Birbeck granules are elongated, they do not typically feature the specific angled "blade" associated with a hockey stick. (Note: "Hockey stick" appearance is sometimes used to describe the distribution of the rash in *Incontinentia Pigmenti* or specific ECG findings in Digoxin toxicity). * **Bat:** This shape is not associated with any specific dermatopathological organelle. * **Ball:** Birbeck granules are linear/rod-like, not spherical. **NEET-PG High-Yield Pearls:** 1. **Langerhans Cell Histiocytosis (LCH):** Birbeck granules are the gold-standard diagnostic feature for LCH (formerly Histiocytosis X) [1]. 2. **Immunohistochemistry (IHC):** Langerhans cells are positive for **S-100**, **CD1a**, and most specifically, **Langerin (CD207)** [1]. 3. **Origin:** Langerhans cells are dendritic antigen-presenting cells derived from the bone marrow, primarily located in the *stratum spinosum* of the epidermis. 4. **Electron Microscopy:** It is essential to remember that Birbeck granules are **only** visible under electron microscopy, not light microscopy [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, p. 630.
Question 10: Which of the following is NOT true regarding the histopathology of psoriasis?
- A. Epidermal thickening
- B. Suprapapillary thinning
- C. Kogoj's spongiform pustules
- D. Pautrier's microabscess (Correct Answer)
Explanation: **Explanation:** The correct answer is **D. Pautrier’s microabscess**, as this is a hallmark histological feature of **Mycosis Fungoides** (Cutaneous T-cell Lymphoma), not psoriasis [3]. Pautrier’s microabscesses are characterized by intraepidermal clusters of atypical T-lymphocytes (Sezary cells) [3], [4]. **Analysis of Options:** * **A. Epidermal thickening:** Psoriasis is characterized by **regular acanthosis** (thickening of the stratum spinosum) with elongated, "test-tube" shaped rete ridges [1], [2]. * **B. Suprapapillary thinning:** In psoriasis, the epidermis overlying the dermal papillae is significantly thinned [1]. This thinning, combined with dilated, tortuous capillaries in the dermal papillae, leads to **Auspitz sign** (pinpoint bleeding when scales are removed) [1], [2]. * **C. Kogoj’s spongiform pustules:** These are collections of neutrophils within the upper layers of the spinous process (stratum spinosum) [2]. Along with **Munro’s microabscesses** (neutrophils in the stratum corneum), these are pathognomonic for psoriasis [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Key Histology Mnemonic:** "Regular Acanthosis, Absent Granular layer, Munro’s microabscess." * **Munro vs. Kogoj:** Both contain neutrophils. Munro’s is in the **Corneum** (top layer), while Kogoj’s is in the **Spinosum** (middle layer) [2]. * **Stratum Granulosum:** Characteristically **thinned or absent** in psoriasis. * **Parakeratosis:** Presence of nuclei in the stratum corneum is a constant feature [2]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Disorders Involving Inflammatory And Haemopoietic Cells, pp. 640-641. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, p. 1168. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 564-565. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, p. 1162.
Practice by Chapter
Structure and Function of Skin
Practice Questions
Inflammatory Dermatoses
Practice Questions
Blistering Diseases
Practice Questions
Infectious Diseases of the Skin
Practice Questions
Disorders of Pigmentation
Practice Questions
Benign Skin Tumors
Practice Questions
Malignant Skin Tumors
Practice Questions
Connective Tissue Disorders of the Skin
Practice Questions
Cutaneous Manifestations of Systemic Disease
Practice Questions
Hair and Nail Disorders
Practice Questions
Want unlimited practice?
Get full access to all questions, explanations, and performance tracking.
Start For Free