Rheumatology and Immunology — MCQs
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Which antibody is strongly associated with polymyositis?
A 45-year-old hypertensive female patient presented with recurrent sinusitis, otitis media, nasal blockage, cough, haemoptysis, and chest discomfort. On examination, she had nasal septal perforation, palpable purpura, and non-healing ulcers in lower limbs. Laboratory findings included anemia, leukocytosis, raised ESR, proteinuria, and increased C-ANCA levels. Histopathological examination revealed necrotizing vasculitis and granuloma formation. What is the first-line drug for the above condition?
A 45-year-old lady presents with features suggestive of mononeuritis multiplex. She has a history of regular attacks of bronchial asthma preceded by allergic rhinitis. She also has cutaneous purpura. Blood routine examination reveals eosinophilia. What is the most likely diagnosis to be considered in this clinical scenario?
All of the following are features of Systemic Lupus Erythematosus (SLE) except?
Humoral immunodeficiency is suspected in a patient and is under investigation. Which of the following infections would not be consistent with the diagnosis?
Fibromyalgia is characterized by:
Which of the following is a treatment for rheumatoid arthritis?
A 45-year-old woman presents with pain in her fingers upon exposure to cold, arthralgias, and difficulty swallowing solid food. What is the most useful test for a definitive diagnosis?
A 26-year-old woman develops a red rash over her cheeks and pain, and swelling in both wrists as well as several small joints in her hands. The rash gets worse on sun exposure and involves her cheeks, nose, ears, and chin. Medical evaluation reveals oral ulceration and 3+ proteinuria. Which of the following is the most specific test for the diagnosis of this condition?
Acanthosis nigricans is seen in?
Rheumatology and Immunology Indian Medical PG Practice Questions and MCQs
Question 171: Which antibody is strongly associated with polymyositis?
- A. Anti-Jo-1 (Correct Answer)
- B. Anti-Ku
- C. Anti-Scl-70
- D. Anti-Sm
Explanation: **Explanation:** **Correct Option: A. Anti-Jo-1** Anti-Jo-1 is the most common **anti-aminoacyl tRNA synthetase antibody** associated with Idiopathic Inflammatory Myopathies (IIM), specifically **Polymyositis (PM)** and Dermatomyositis (DM) [1]. It is directed against histidyl-tRNA synthetase. Its presence is highly specific and defines the "Anti-Synthetase Syndrome," characterized by myositis, interstitial lung disease (ILD), Raynaud’s phenomenon, non-erosive arthritis, and "mechanic’s hands" [2]. **Incorrect Options:** * **B. Anti-Ku:** While it can be seen in overlap syndromes involving myositis and systemic sclerosis, it is not the primary or most strongly associated antibody for isolated polymyositis. * **C. Anti-Scl-70 (Anti-topoisomerase I):** This is a highly specific marker for **Diffuse Cutaneous Systemic Sclerosis** and is associated with an increased risk of pulmonary fibrosis in those patients. * **D. Anti-Sm (Anti-Smith):** This is the most specific antibody for **Systemic Lupus Erythematosus (SLE)**, though it is only present in about 15-30% of cases [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Anti-Mi-2:** Strongly associated with **Dermatomyositis** (good prognosis, classic skin rashes). * **Anti-SRP (Signal Recognition Particle):** Associated with severe, necrotizing myopathy and poor response to therapy. * **Anti-MDA5:** Associated with clinically amyopathic dermatomyositis and rapidly progressive ILD. * **Muscle Biopsy in PM:** Shows endomysial inflammation with **CD8+ T-cells** invading non-necrotic muscle fibers. (Contrast with DM: Perimysial inflammation with CD4+ T-cells).
Question 172: A 45-year-old hypertensive female patient presented with recurrent sinusitis, otitis media, nasal blockage, cough, haemoptysis, and chest discomfort. On examination, she had nasal septal perforation, palpable purpura, and non-healing ulcers in lower limbs. Laboratory findings included anemia, leukocytosis, raised ESR, proteinuria, and increased C-ANCA levels. Histopathological examination revealed necrotizing vasculitis and granuloma formation. What is the first-line drug for the above condition?
- A. Cyclophosphamide (Correct Answer)
- B. Corticosteroids
- C. 5-Fluorouracil
- D. Azathioprine
Explanation: ### Explanation **Diagnosis: Granulomatosis with Polyangiitis (GPA), formerly Wegener’s Granulomatosis.** The clinical triad of **upper respiratory tract involvement** (sinusitis, nasal septal perforation/saddle nose deformity), **lower respiratory tract involvement** (cough, hemoptysis), and **renal involvement** (proteinuria/hematuria) is classic for GPA. The presence of **c-ANCA (PR3-ANCA)** positivity and histopathology showing **necrotizing granulomatous vasculitis** confirms the diagnosis. #### 1. Why Cyclophosphamide is Correct For **induction of remission** in severe or organ-threatening GPA, the standard of care is a combination of **High-dose Corticosteroids plus either Cyclophosphamide or Rituximab** [1]. In the context of NEET-PG, Cyclophosphamide remains the traditional "gold standard" first-line cytotoxic agent for inducing remission in systemic vasculitis [1]. It works by suppressing the overactive immune response and preventing irreversible organ damage (like renal failure). #### 2. Why Other Options are Incorrect * **B. Corticosteroids:** While used in conjunction with Cyclophosphamide, they are rarely used as monotherapy for severe GPA. They control acute inflammation but do not maintain long-term remission in systemic vasculitis [1]. * **C. 5-Fluorouracil:** This is an antimetabolite chemotherapy agent used primarily for malignancies (e.g., GI cancers) and has no role in the treatment of ANCA-associated vasculitis. * **D. Azathioprine:** This is used for **maintenance of remission** after the disease has been controlled by Cyclophosphamide [1]. It is not potent enough for the initial induction phase in severe disease. #### Clinical Pearls for NEET-PG * **Classic Triad:** Upper Respiratory + Lower Respiratory + Glomerulonephritis. * **Serology:** c-ANCA is highly specific for GPA (targets Proteinase-3) [1]. * **Histology:** Look for the "Geographic Necrosis" and "Palisading Granulomas." * **Drug Side Effect:** Cyclophosphamide can cause **Hemorrhagic Cystitis** (prevented by **MESNA**) and increases the risk of transitional cell carcinoma of the bladder. * **Limited GPA:** If the disease is non-organ threatening, Methotrexate may be used for induction.
Question 173: A 45-year-old lady presents with features suggestive of mononeuritis multiplex. She has a history of regular attacks of bronchial asthma preceded by allergic rhinitis. She also has cutaneous purpura. Blood routine examination reveals eosinophilia. What is the most likely diagnosis to be considered in this clinical scenario?
- A. Microscopic polyangiitis
- B. Endogenous bronchial asthma
- C. Churg-Strauss syndrome (Correct Answer)
- D. Wegener's vasculitis
Explanation: **Explanation:** The clinical presentation described is a classic triad of **asthma, eosinophilia, and systemic vasculitis**, which are the hallmarks of **Churg-Strauss Syndrome (CSS)**, now officially known as **Eosinophilic Granulomatosis with Polyangiitis (EGPA)** [1]. **Why Churg-Strauss Syndrome is correct:** EGPA typically evolves through three phases: 1. **Prodromal phase:** Allergic rhinitis and asthma [2]. 2. **Eosinophilic phase:** Peripheral blood eosinophilia and organ infiltration (e.g., Löffler’s syndrome). 3. **Vasculitic phase:** Small-vessel vasculitis affecting multiple organs [1]. The presence of **mononeuritis multiplex** (asymmetric peripheral neuropathy) and **cutaneous purpura** in a patient with a history of asthma and eosinophilia is pathognomonic for EGPA [1]. **Why other options are incorrect:** * **Microscopic polyangiitis (MPA):** While it causes small-vessel vasculitis and glomerulonephritis, it is **not** associated with asthma or significant eosinophilia. * **Endogenous bronchial asthma:** This explains the respiratory symptoms but does not account for the systemic vasculitis (purpura), eosinophilia, or neurological deficits (mononeuritis multiplex) [2]. * **Wegener's vasculitis (GPA):** Granulomatosis with polyangiitis primarily involves the upper/lower respiratory tract (sinusitis, lung nodules) and kidneys. It is typically **not** associated with asthma or eosinophilia and is strongly linked to **c-ANCA**, whereas EGPA is more often associated with **p-ANCA**. **High-Yield Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Biopsy showing necrotizing vasculitis with eosinophilic tissue infiltration [1]. * **Serology:** p-ANCA (anti-MPO) is positive in about 40-50% of cases (usually those with vasculitic features like purpura or glomerulonephritis) [1]. * **ACR Criteria:** Requires 4 out of 6: Asthma, Eosinophilia (>10%), Neuropathy, Pulmonary opacities, Paranasal sinus abnormality, and Extravascular eosinophils on biopsy. * **Treatment:** Glucocorticoids are the mainstay; Cyclophosphamide is added for severe organ involvement [1].
Question 174: All of the following are features of Systemic Lupus Erythematosus (SLE) except?
- A. Sterile vegetations on valve cusps
- B. Raynaud's phenomenon
- C. Atherosclerosis
- D. Idiopathic pulmonary nodules (Correct Answer)
Explanation: **Explanation:** The correct answer is **D. Idiopathic pulmonary nodules**. While SLE can involve the lungs, pulmonary nodules are not a characteristic feature [2]. Instead, they are a classic extra-articular manifestation of **Rheumatoid Arthritis (Caplan’s Syndrome)**. SLE-related pulmonary involvements typically include pleuritis (most common), interstitial lung disease, or the rare but life-threatening "Shrinking Lung Syndrome" [2]. **Analysis of Options:** * **A. Sterile vegetations on valve cusps:** This refers to **Libman-Sacks Endocarditis**. These are small, sterile, non-bacterial vegetations found on both sides of the valve leaflets (mitral valve most common). * **B. Raynaud's phenomenon:** This occurs in approximately 30% of SLE patients [1]. It is characterized by reversible digital ischemia in response to cold or stress. * **C. Atherosclerosis:** SLE is an independent risk factor for accelerated atherosclerosis. Chronic inflammation, corticosteroid use, and the presence of anti-phospholipid antibodies contribute to a significantly higher risk of myocardial infarction in these patients [2]. **Clinical Pearls for NEET-PG:** * **Most common cardiac manifestation:** Pericarditis. * **Most common pulmonary manifestation:** Pleuritis/Pleural effusion (Exudative) [2]. * **Specific Autoantibodies:** Anti-dsDNA (correlates with disease activity and lupus nephritis) and Anti-Smith (most specific) [3]. * **Drug-Induced Lupus:** Associated with Anti-Histone antibodies; usually spares the CNS and Kidneys. * **Libman-Sacks Endocarditis:** Unlike infective endocarditis, these vegetations are sterile and can occur on the undersurface of valves.
Question 175: Humoral immunodeficiency is suspected in a patient and is under investigation. Which of the following infections would not be consistent with the diagnosis?
- A. Giardiasis
- B. Pneumocystis jirovecii pneumonia (Correct Answer)
- C. Recurrent sinusitis
- D. Recurrent subcutaneous abscesses
Explanation: The core concept tested here is the distinction between **Humoral (B-cell) Immunodeficiency** and **Cellular (T-cell) Immunodeficiency**. [1], [2] **Why B is the correct answer:** *Pneumocystis jirovecii* is an opportunistic fungus. Defense against *Pneumocystis* depends primarily on **Cell-mediated immunity (T-cells)** and macrophages. Therefore, *Pneumocystis jirovecii* pneumonia (PJP) is a hallmark of T-cell dysfunction (e.g., HIV/AIDS, SCID, or transplant patients) rather than pure humoral immunodeficiency. [1], [2] While some B-cell defects (like Hyper-IgM syndrome) can present with PJP, it is because those defects involve impaired T-cell signaling (CD40-CD40L interaction). **Analysis of incorrect options:** * **A. Giardiasis:** Secretory IgA is essential for neutralizing parasites in the gut. Patients with Common Variable Immunodeficiency (CVID) or Selective IgA deficiency lack this protection, making recurrent *Giardia lamblia* infections a classic presentation. [2] * **C. Recurrent sinusitis:** Humoral immunity (IgG and IgA) is the primary defense against encapsulated bacteria (*S. pneumoniae, H. influenzae*). Lack of antibodies leads to recurrent sinopulmonary infections. [1] * **D. Recurrent subcutaneous abscesses:** While often associated with neutrophil defects (like CGD), recurrent staphylococcal skin infections are also frequently seen in humoral defects (like Bruton’s Agammaglobulinemia) due to the inability to opsonize bacteria. **NEET-PG High-Yield Pearls:** * **Humoral Defects:** Present after 6 months of age (once maternal IgG wanes) with recurrent infections by **encapsulated bacteria** (Streptococcus, Haemophilus) and enteroviruses. [1], [2] * **T-Cell Defects:** Present earlier (infancy) with **opportunistic infections** (Fungi like *Candida* or *Pneumocystis*, Viruses like CMV, and Mycobacteria). [1], [2] * **CVID:** The most common symptomatic primary antibody deficiency in adults; look for the triad of recurrent sinopulmonary infections, giardiasis, and autoimmunity. [1]
Question 176: Fibromyalgia is characterized by:
- A. Reduced delta sleep wave activity (Correct Answer)
- B. Rapid spontaneous resolution
- C. Musculoskeletal pain without local tenderness
- D. Physiotherapy is useful
Explanation: Fibromyalgia is a chronic central pain sensitization syndrome characterized by widespread musculoskeletal pain, fatigue, and sleep disturbances [1]. **1. Why Option A is Correct:** The hallmark of sleep disturbance in fibromyalgia is the **intrusion of alpha waves (wakefulness) into delta waves (deep sleep)**, often referred to as "alpha-delta sleep." Delta waves are characteristic of Stage 3 and 4 NREM sleep, which is the restorative phase. Reduced delta wave activity leads to non-restorative sleep, which is a key diagnostic feature and contributes to the pathogenesis of chronic fatigue and lowered pain thresholds [1]. **2. Why Other Options are Incorrect:** * **Option B:** Fibromyalgia is a **chronic condition** [3]. It does not resolve spontaneously and typically requires long-term multidisciplinary management. * **Option C:** By definition, fibromyalgia involves **widespread tenderness** [1]. While the 1990 ACR criteria focused on 11/18 specific "tender points," the 2010/2016 revised criteria emphasize a Widespread Pain Index (WPI) and Symptom Severity (SS) scale [2]. * **Option D:** While physical activity is recommended, **low-impact aerobic exercise** (like walking or swimming) is the gold standard [3]. Intensive or traditional physiotherapy can sometimes exacerbate pain if not tailored specifically to the patient’s tolerance. **High-Yield Clinical Pearls for NEET-PG:** * **Demographics:** Most common in females (20–50 years). * **Pathophysiology:** Central sensitization and "wind-up" phenomenon; decreased levels of serotonin and norepinephrine in descending inhibitory pathways [1]. * **Diagnosis:** It is a **diagnosis of exclusion**. Labs (ESR, CRP, Muscle enzymes) are characteristically **normal** [2]. * **Management:** First-line pharmacological treatments include **Amitriptyline** (TCA), **Duloxetine** (SNRI), or **Pregabalin** (Anticonvulsant). Opioids and Steroids are generally **ineffective**.
Question 177: Which of the following is a treatment for rheumatoid arthritis?
- A. Gold salts
- B. Corticosteroids
- C. Aspirin
- D. All of the above (Correct Answer)
Explanation: ### Explanation The management of Rheumatoid Arthritis (RA) involves a multi-modal pharmacological approach aimed at reducing inflammation, relieving pain, and preventing joint destruction. [1] **1. Gold Salts (Option A):** Historically, gold salts (e.g., sodium aurothiomalate) were a mainstay of treatment. They belong to the class of **Conventional Synthetic Disease-Modifying Antirheumatic Drugs (csDMARDs)**. While their use has significantly declined due to the advent of more effective drugs like Methotrexate and their potential for toxicity (nephrotic syndrome, bone marrow suppression), they remain a valid pharmacological treatment for RA in specific clinical contexts. **2. Corticosteroids (Option B):** Steroids (e.g., Prednisolone) are used as **"bridge therapy"** to provide rapid symptomatic relief while waiting for DMARDs to take effect (which usually takes 6–12 weeks). [1] They are also used to manage acute flares due to their potent anti-inflammatory properties. **3. Aspirin (Option C):** Aspirin is a **Non-Steroidal Anti-Inflammatory Drug (NSAID)**. NSAIDs are used for symptomatic management to reduce pain and stiffness. [1] While they do not alter the disease course or prevent joint damage, they are essential for immediate palliative care. **Conclusion:** Since all three classes—DMARDs (Gold), steroids, and NSAIDs (Aspirin)—are utilized in the management of RA, **Option D** is the correct answer. --- ### High-Yield Clinical Pearls for NEET-PG: * **Drug of Choice (DOC):** Methotrexate is the "Anchor Drug" and the initial DMARD of choice for RA. [1] * **Monitoring:** Patients on Methotrexate require **Folic acid supplementation** to reduce GI toxicity and hepatotoxicity. [1] * **Biological DMARDs:** TNF-alpha inhibitors (Infliximab, Etanercept) are used in resistant cases. **Rule out Latent TB** (via Mantoux or IGRA) before starting biologicals. * **Gold Salts Side Effect:** Most common side effect is a pruritic skin rash; most serious is membranous glomerulonephritis. * **Leflunomide:** Acts by inhibiting **dihydroorotate dehydrogenase** (pyrimidine synthesis inhibitor).
Question 178: A 45-year-old woman presents with pain in her fingers upon exposure to cold, arthralgias, and difficulty swallowing solid food. What is the most useful test for a definitive diagnosis?
- A. Rheumatoid factor
- B. Anti-Scl-70 antibody (Correct Answer)
- C. ANA
- D. Anti-Jo-1 antibody
Explanation: ### Explanation The clinical presentation of **Raynaud’s phenomenon** (cold-induced finger pain), **arthralgia**, and **dysphagia** (esophageal dysmotility) is highly suggestive of **Systemic Sclerosis (Scleroderma)**. [1] **1. Why Anti-Scl-70 is correct:** Anti-Scl-70 (anti-topoisomerase I) antibody is highly specific for **Diffuse Cutaneous Systemic Sclerosis (dcSSc)**. In a patient presenting with systemic features like dysphagia and Raynaud’s, identifying a specific autoantibody is the most useful step for a definitive diagnosis and prognosis. Anti-Scl-70 is associated with an increased risk of interstitial lung disease (ILD) and more extensive skin involvement. **2. Why the other options are incorrect:** * **A. Rheumatoid factor:** While it can be positive in various connective tissue diseases, it is non-specific and primarily used for Rheumatoid Arthritis, which does not typically cause dysphagia or classic Raynaud’s. [1] * **C. ANA (Antinuclear Antibody):** This is the **best initial screening test** for Systemic Sclerosis (positive in >95% of cases). However, it is not "definitive" because it is positive in many other conditions (SLE, Sjögren’s) and even in healthy individuals. [1] * **D. Anti-Jo-1 antibody:** This is the marker for **Antisynthetase Syndrome** (a subset of Inflammatory Myositis). While it can cause Raynaud’s and arthralgia, it is characterized by muscle weakness and "mechanic's hands" rather than the classic scleroderma-related dysphagia. ### High-Yield Clinical Pearls for NEET-PG: * **CREST Syndrome (Limited Scleroderma):** Associated with **Anti-centromere antibodies**. * **Most common cause of death in Scleroderma:** Currently **Interstitial Lung Disease (ILD)**; previously it was Scleroderma Renal Crisis (managed with ACE inhibitors). [1] * **Gastrointestinal involvement:** The esophagus is the most common GI site affected (lower 2/3rd), leading to aperistalsis and GERD. * **Gold Standard for Raynaud’s evaluation:** Nailfold capillaroscopy. [1]
Question 179: A 26-year-old woman develops a red rash over her cheeks and pain, and swelling in both wrists as well as several small joints in her hands. The rash gets worse on sun exposure and involves her cheeks, nose, ears, and chin. Medical evaluation reveals oral ulceration and 3+ proteinuria. Which of the following is the most specific test for the diagnosis of this condition?
- A. Lupus erythematosus (LE) cells
- B. Antinuclear antibody (ANA)
- C. Anti-Sm antibody (Correct Answer)
- D. Anti-Ro antibody
Explanation: ### Explanation **Diagnosis:** The clinical presentation of malar rash (photosensitive), symmetrical polyarthritis (wrists and small joints), oral ulcers, and significant proteinuria (3+) in a young female is classic for **Systemic Lupus Erythematosus (SLE)** [1]. #### 1. Why Anti-Sm antibody is the correct answer: While many antibodies are associated with SLE, **Anti-Smith (Anti-Sm) antibodies** are highly specific (nearly 99%) for the diagnosis [1]. Although they are only present in about 20-30% of patients, their presence is virtually pathognomonic for SLE [1]. Along with Anti-dsDNA, it is a part of the ACR/SLICC classification criteria. #### 2. Why the other options are incorrect: * **Lupus erythematosus (LE) cells:** This is an obsolete test where neutrophils ingest denatured nuclear material. It lacks both sensitivity and specificity compared to modern assays and is no longer used in clinical practice. * **Antinuclear antibody (ANA):** This is the **best initial screening test** because it is positive in >95% of SLE patients (high sensitivity) [1]. However, it is **not specific**, as it can be positive in other autoimmune diseases, infections, and even healthy individuals [1]. * **Anti-Ro (SS-A) antibody:** While associated with SLE, it is more classically linked to **Sj'ogren’s syndrome**, Neonatal Lupus (congenital heart block), and Subacute Cutaneous Lupus (SCLE) [1]. #### Clinical Pearls for NEET-PG: * **Most Sensitive Test:** ANA (Best for screening) [1]. * **Most Specific Tests:** Anti-Sm and Anti-dsDNA [1]. * **Best for Monitoring Disease Activity:** Anti-dsDNA levels (correlates with lupus nephritis and low C3/C4 levels) [1]. * **Drug-Induced Lupus:** Anti-Histone antibodies are the hallmark (Procainamide, Hydralazine). * **Antiphospholipid Syndrome (APS):** Look for Anti-cardiolipin, Anti-̢2 glycoprotein I, or Lupus anticoagulant.
Question 180: Acanthosis nigricans is seen in?
- A. Psoriatic arthropathy (Correct Answer)
- B. Rheumatoid arthritis
- C. Spondyloarthropathy
- D. Reactive arthritis
Explanation: **Explanation:** **Acanthosis Nigricans (AN)** is a clinical marker characterized by hyperpigmented, velvety plaques typically found in intertriginous areas (axilla, neck). While most commonly associated with insulin resistance and obesity, it is a recognized cutaneous manifestation of **Psoriatic Arthropathy (PsA)**. 1. **Why Psoriatic Arthropathy is correct:** PsA is strongly linked with **Metabolic Syndrome**, which includes obesity, type 2 diabetes mellitus, and insulin resistance. Insulin resistance leads to high levels of circulating insulin, which binds to Insulin-like Growth Factor (IGF) receptors on keratinocytes and fibroblasts, stimulating their proliferation and resulting in the characteristic skin changes of AN. Furthermore, both psoriasis and AN share common inflammatory pathways involving TNF-alpha. 2. **Why other options are incorrect:** * **Rheumatoid Arthritis (B):** Associated with subcutaneous nodules, vasculitis, and Pyoderma gangrenosum, but not typically with AN. * **Spondyloarthropathy (C) & Reactive Arthritis (D):** While PsA is a type of seronegative spondyloarthropathy [1], the specific association with AN is driven by the metabolic comorbidities unique to the psoriatic disease spectrum. Reactive arthritis is more commonly associated with *Keratoderma blennorrhagicum* and circinate balanitis. **High-Yield Clinical Pearls for NEET-PG:** * **Malignant Acanthosis Nigricans:** If AN appears suddenly and is extensive (especially involving the palms/soles, known as "Tripe Palms"), it is a paraneoplastic sign most commonly associated with **Gastric Adenocarcinoma**. * **PsA Triad:** Look for the combination of inflammatory arthritis, psoriasis skin lesions, and nail changes (pitting, onycholysis) [1]. * **Drug-induced AN:** Can be caused by systemic glucocorticoids, nicotinic acid, and oral contraceptives.
Practice by Chapter
Rheumatoid Arthritis
Practice Questions
Spondyloarthropathies
Practice Questions
Systemic Lupus Erythematosus
Practice Questions
Vasculitis Syndromes
Practice Questions
Scleroderma and Related Disorders
Practice Questions
Inflammatory Myopathies
Practice Questions
Crystal Arthropathies
Practice Questions
Osteoarthritis
Practice Questions
Primary Immunodeficiency Disorders
Practice Questions
Autoinflammatory Syndromes
Practice Questions
Sjögren's Syndrome
Practice Questions
Antiphospholipid Syndrome
Practice Questions
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