Afghanistan Comprehensive Specialization Completion Exam (Takhasus) Feed

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A 64-year-old postmenopausal female presents to the emergency department 2 hours after experiencing severe emotional shock following the sudden death of her spouse. She complains of acute substernal crushing chest pain and shortness of breath. ECG shows 2 mm ST-segment elevations across leads V2–V6 without reciprocal changes. Emergent coronary angiography reveals angiographically normal coronary arteries without plaque rupture, thrombosis, or focal spasm. Left ventriculography demonstrates marked apical and mid-ventricular akinesis with basal hyperkinesis ('apical ballooning') and an estimated left ventricular ejection fraction of 30%. Cardiac magnetic resonance (CMR) imaging is scheduled. What is the characteristic CMR finding that differentiates this condition from acute myocardial infarction and acute myocarditis?

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A 28-year-old previously healthy woman presents with refractory hypertension (blood pressure 178/104 mmHg despite dual-agent antihypertensive therapy) and an unprovoked sudden right-sided pulsatile tinnitus. Physical examination reveals an epigastric systolic-diastolic vascular bruit and a right carotid bruit. Serum creatinine is 0.9 mg/dL and serum potassium is 3.4 mEq/L. Computed tomography angiography (CTA) of the renal and carotid arteries reveals bilateral alternating areas of arterial stenosis and aneurysmal dilation described as a 'string of beads' primarily involving the middle and distal segments of the renal arteries. What is the most definitive primary interventional therapy of choice for her renal vascular pathology?

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A 52-year-old male with a history of bicuspid aortic valve presents to the resuscitation bay with sudden-onset excruciating 'tearing' chest pain radiating directly into the interscapular region. His blood pressure is 88/54 mmHg in the right arm and 84/50 mmHg in the left arm, with a heart rate of 118 bpm. Cardiac examination reveals distant heart sounds, jugular venous distention, and a new high-pitched decrescendo diastolic murmur at the right sternal border. Point-of-care transthoracic echocardiography demonstrates an intimal flap in the ascending aorta, severe aortic regurgitation, and a 1.2 cm pericardial effusion without frank diastolic right ventricular collapse. What is the immediate, most appropriate definitive management step?

Advanced Clinical Diagnosis

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A 74-year-old male with a history of bilateral carpal tunnel syndrome and lumbar spinal stenosis presents with progressive exertional dyspnea, orthopnea, and lower extremity edema over the past 8 months. 12-lead ECG demonstrates normal sinus rhythm with low QRS voltage in limb leads and pseudo-infarction QS waves in leads V1–V3. Echocardiography reveals marked symmetric concentric left ventricular wall thickening (septum 18 mm), biatrial enlargement, mildly reduced LVEF (42%), and speckle-tracking global longitudinal strain showing preserved apical strain with severe basal and mid-ventricular impairment ('apical sparing' pattern). Serum and urine protein electrophoresis with immunofixation and serum free light chain (sFLC) ratio are completely normal. What is the next most definitive non-invasive diagnostic investigation to confirm the underlying etiology?

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A 23-year-old woman is brought to the hospital by her family due to dramatic behavioral changes, visual hallucinations, and acute persecutory delusions that developed over two weeks. Over the subsequent 5 days in the inpatient psychiatric unit, she developed refractory generalized tonic-clonic seizures, progressive mutism, prominent orofacial and lingual dyskinesias (lip-smacking and tongue protrusion), fluctuating hyperpyrexia, blood pressure instability, and sinus tachycardia. Brain MRI with gadolinium is normal. Routine CSF analysis reveals mild lymphocytic pleocytosis (22 WBCs/uL) with normal protein and glucose. Serum and CSF testing confirm high-titer antibodies against the GluN1 subunit of the NMDA receptor. Pelvic MRI reveals a 4.5 cm cystic and solid right adnexal mass. What is the fundamental two-pronged therapeutic strategy required for optimal long-term neurological recovery?

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A 71-year-old retired architect is evaluated for a 9-month history of progressive gait unsteadiness, described by his family as if his 'feet are stuck to the floor' (magnetic, wide-based, short-stepped gait). Over the past 4 months, he has developed new-onset urinary urgency with urge incontinence and mild executive cognitive dysfunction with psychomotor slowing. Brain MRI demonstrates marked ventriculomegaly with an Evans index of 0.38, narrowing of the high-convexity sulci with disproportionately enlarged subarachnoid space hydrocephalus (DESH), and no significant cortical atrophy or focal white matter infarctions. What is the most predictive next diagnostic procedure to assess whether this patient will benefit from ventriculoperitoneal shunt surgery?

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A 34-year-old man presents with progressive symmetric ascending weakness that began in both lower extremities 4 days ago and now involves his upper limbs, accompanied by distal paresthesias in a glove-and-stocking distribution. Two weeks prior, he had a self-limited episode of watery diarrhea. On physical examination, he has symmetric 3/5 strength in the lower extremities and 4/5 strength in the upper extremities, with generalized bilateral absent deep tendon reflexes (areflexia) and bilateral mild facial weakness (CN VII). Vital capacity is currently 38 mL/kg. Lumbar puncture performed on day 5 of symptom onset reveals normal opening pressure, protein 145 mg/dL (elevated), and WBC count 2 cells/uL (normal). What is the classical terminology for this CSF finding and the primary pathogen most frequently associated with this presentation?

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A 58-year-old male heavy smoker presents with progressive proximal lower extremity muscle weakness, dry mouth (xerostomia), and erectile dysfunction over the past 5 months. On physical examination, deep tendon reflexes in the patellar and Achilles tendons are diminished at rest but become markedly brisker after 10 seconds of maximal isometric quadriceps contraction (post-exercise facilitation). Repetitive nerve stimulation (RNS) electrodiagnostic testing is performed. What is the characteristic electrophysiological finding at low-frequency (2–3 Hz) versus high-frequency (20–50 Hz) or post-exercise stimulation in this patient?

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A 67-year-old male presents with a 14-month history of insidious, progressive exertional breathlessness and a dry, hacking cough. He is a former smoker (30 pack-years) with no environmental, occupational, or medication exposures, and no joint pain, skin rash, or Raynaud phenomenon. Physical examination reveals bilateral fine end-inspiratory 'Velcro-like' crackles at the lung bases and digital clubbing. High-resolution computed tomography (HRCT) of the chest demonstrates bilateral, subpleural, basal-predominant reticular opacities, traction bronchiectasis, and prominent subpleural honeycombing without ground-glass attenuation, mosaic attenuation, or micronodules. What is the most appropriate next step in establishing the definitive diagnosis according to international consensus guidelines?

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A 48-year-old female presents to the emergency department with acute onset of severe pleuritic chest pain and breathlessness 10 days following an uncomplicated elective total knee arthroplasty. Her vital signs are: BP 122/76 mmHg, HR 108 bpm, RR 24 breaths/min, and SpO2 93% on room air. CT pulmonary angiography (CTPA) reveals extensive bilateral filling defects in the main pulmonary arteries extending into lobar branches. Transthoracic echocardiography demonstrates right ventricular dilation with an RV/LV basal diameter ratio of 1.2 and flattening of the interventricular septum during diastole (McConnell sign). Serum troponin I is elevated at 0.14 ng/mL and NT-proBNP is 1,200 pg/mL. What is the clinical risk classification of this patient's pulmonary embolism and the initial management strategy?

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A 42-year-old male with a 10-year history of severe adult-onset steroid-dependent asthma and chronic allergic rhinosinusitis with nasal polyposis presents with severe burning pain and weakness in his right foot (foot drop), followed 3 days later by left wrist drop. Laboratory investigations reveal: WBC 16,500/uL with 38% eosinophils (absolute eosinophil count 6,270/uL), serum IgE 1,450 IU/mL, and positive perinuclear anti-neutrophil cytoplasmic antibodies (p-ANCA) directed against myeloperoxidase (anti-MPO). High-resolution chest CT reveals transient, non-fixed patchy alveolar infiltrates. Sural nerve biopsy demonstrates necrotizing extravascular eosinophilic granulomas and necrotizing vasculitis of small- and medium-sized epineural vessels. What is the definitive diagnosis?

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A 54-year-old non-smoking female presents with a 2-month history of non-productive cough, low-grade fever, malaise, and mild dyspnea that failed to resolve despite two successive courses of empiric oral antibiotics (amoxicillin-clavulanate and azithromycin). High-resolution chest CT (HRCT) demonstrates bilateral, patchy, non-segmental subpleural and peribronchovascular consolidations with ground-glass opacities, as well as a classic 'atoll sign' (reverse halo sign: a central ground-glass opacity surrounded by a complete dense crescentic/ring-like consolidation). Bronchoalveolar lavage (BAL) reveals a marked mixed lymphocytic alveolitis (35% lymphocytes) with a reduced CD4/CD8 ratio and 8% eosinophils. Transbronchial biopsy demonstrates excessive buds of granulation tissue within alveolar ducts and alveoli (Masson bodies) without architectural destruction. What is the most definitive diagnosis and first-line treatment?

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A 36-year-old woman presents with progressive central weight gain, facial rounding ('moon facies'), easy bruisability, violaceous abdominal striae >1 cm in width, proximal muscle weakness, and new-onset secondary amenorrhea. Screening tests confirm hypercortisolemia with two elevated 24-hour urinary free cortisol measurements (3.5 times upper limit of normal) and an unsuppressed 8:00 AM serum cortisol (18 ug/dL) following a 1-mg overnight dexamethasone suppression test. Her baseline plasma adrenocorticotropic hormone (ACTH) is measured and found to be 85 pg/mL (normal: 10–60 pg/mL; elevated). What is the next logical step in the diagnostic algorithm to localize the source of ACTH production?

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A 44-year-old male is evaluated for difficult-to-control hypertension (seated BP 168/102 mmHg on amlodipine and hydrochlorothiazide). Routine biochemistry reveals serum sodium 144 mEq/L, serum potassium 3.1 mEq/L, and bicarbonate 31 mEq/L. Plasma aldosterone concentration (PAC) is 32 ng/dL and plasma renin activity (PRA) is 0.4 ng/mL/h, yielding an elevated PAC/PRA ratio of 80. A 4-hour intravenous 2-liter saline suppression test demonstrates a post-infusion PAC of 18 ng/dL (normal < 5 ng/dL, confirming primary aldosteronism). High-resolution thin-section adrenal CT shows a 1.2 cm well-circumscribed hypodense nodule in the left adrenal gland and a normal right adrenal gland. The patient desires curative surgery. What mandatory diagnostic investigation must be performed prior to offering laparoscopic adrenalectomy?

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A 38-year-old woman with neurofibromatosis type 1 (NF1) presents with paroxysmal episodes of throbbing headache, profuse diaphoresis, palpitations, and marked pallor. During an episode in the clinic, her blood pressure spikes to 220/125 mmHg with a heart rate of 124 bpm. Plasma free metanephrines and normetanephrines are elevated >5 times the upper limit of normal, and abdominal MRI confirms a 4.8 cm heterogeneous vascular mass in the right adrenal medulla. She is scheduled for laparoscopic right adrenalectomy. What is the fundamental, non-negotiable pharmacologic preoperative preparation sequence required to avoid intraoperative catastrophic hypertensive crisis and shock?

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An 8-year-old boy is evaluated for recurrent intractable oral and nail candidiasis since infancy, new-onset generalized tetany, and muscle cramps. Laboratory investigations demonstrate: serum calcium 6.4 mg/dL (low), phosphate 6.8 mg/dL (high), intact PTH 4 pg/mL (inappropriately low), and 8:00 AM serum cortisol 4.2 ug/dL with elevated ACTH (primary adrenal insufficiency / Addison's disease). Genetic analysis reveals a homozygous loss-of-function mutation in the Autoimmune Regulator (AIRE) gene on chromosome 21q22.3. Which clinical syndrome does this patient have, and what is the third classic component of this disease triad?

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A 32-year-old female presents with chronic bloating, recurrent non-bloody diarrhea, fatigue, and an intensely pruritic papulovesicular rash grouped symmetrically on her extensor elbows, knees, and buttocks. Laboratory testing reveals microcytic anemia (hemoglobin 9.8 g/dL, ferritin 8 ng/mL). Skin punch biopsy of perilesional skin demonstrates granular IgA deposition in the dermal papillae on direct immunofluorescence, confirming dermatitis herpetiformis. Serological screening for celiac disease shows: serum IgA anti-tissue transglutaminase (anti-tTG) is negative (<2 U/mL), but total serum IgA is undetectable (<5 mg/dL; severe IgA deficiency). What is the most appropriate next serologic diagnostic test to confirm celiac disease in this patient?

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A 35-year-old male with a 6-year history of well-controlled pancolitis (ulcerative colitis) presents for routine follow-up. He feels generally well but reports mild pruritus and fatigue. Laboratory investigations reveal: total bilirubin 1.4 mg/dL, alkaline phosphatase (ALP) 480 IU/L (elevated >3x ULN), AST 52 IU/L, ALT 64 IU/L, and negative viral hepatitis serologies, ANA, and AMA. Magnetic resonance cholangiopancreatography (MRCP) demonstrates multifocal segmental strictures and dilations involving both intrahepatic and extrahepatic bile ducts, producing a classic 'beaded' appearance. What is the definitive diagnosis and the major long-term malignant complication for which this patient requires ongoing surveillance?

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A 45-year-old female presents with a 3-month history of worsening fatigue, arthralgias, mild jaundice, and right upper quadrant discomfort. Laboratory evaluation reveals: total bilirubin 3.2 mg/dL, direct bilirubin 2.1 mg/dL, ALT 680 IU/L, AST 590 IU/L, alkaline phosphatase 160 IU/L, and total protein 8.8 g/dL with total IgG elevated at 2,450 mg/dL (marked hypergammaglobulinemia). Viral hepatitis panels (A, B, C, E, EBV, CMV) and acetaminophen levels are negative. Autoimmune serologies demonstrate ANA positive at 1:640 and anti-smooth muscle antibodies (anti-SMA) positive at 1:320 with F-actin specificity; anti-LKM1 and anti-mitochondrial antibodies are negative. Percutaneous liver biopsy is performed. What histological hallmark is characteristic of this condition?

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A 52-year-old male presents with chronic fatigue, bilateral hand joint pain (specifically involving the 2nd and 3rd metacarpophalangeal [MCP] joints), new-onset erectile dysfunction, and darkening/bronzing of his skin. Physical examination reveals hepatomegaly, hyperpigmentation, and tender 2nd/3rd MCP joints with bony swelling; hand radiographs reveal joint space narrowing, subchondral cysts, and hook-like osteophytes. Fasting blood glucose is 188 mg/dL. Fasting iron panel demonstrates: serum iron 210 ug/dL, total iron-binding capacity (TIBC) 240 ug/dL, transferrin saturation 87.5% (normal: 20–45%), and serum ferritin 2,850 ng/mL. Genetic testing confirms homozygous C282Y mutation in the HFE gene. What is the primary initial therapeutic intervention to prevent end-organ cirrhosis and cardiac failure?

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A 49-year-old male presents with recurrent epistaxis, chronic purulent rhinosinusitis, cough with hemoptysis, and shortness of breath over the past 6 weeks. Physical examination reveals a saddle-nose deformity, crusting and ulceration of the nasal mucosa, and bilateral inspiratory crackles. Laboratory testing reveals: serum creatinine 3.4 mg/dL (baseline was 0.9 mg/dL 3 months ago), urinalysis showing dysmorphic RBCs and red blood cell casts with 2+ proteinuria. Chest CT shows bilateral multiple thick-walled cavitary pulmonary nodules. Serology is strongly positive for cytoplasmic anti-neutrophil cytoplasmic antibodies (c-ANCA) with high-titer anti-proteinase 3 (anti-PR3) antibodies. Renal biopsy demonstrates pauci-immune necrotizing crescentic glomerulonephritis. What is the definitive diagnosis?

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A 46-year-old female presents with Raynaud phenomenon, sclerodactyly of the fingers, telangiectasias on her face and lips, subcutaneous calcinosis on the palmar aspect of the fingertips, and severe esophageal dysphagia with reflux (CREST features). Skin thickening is strictly limited to the fingers, hands, and face distal to the elbows and knees. High-resolution chest CT shows no interstitial lung disease. Serological antibody testing reveals high-titer anti-centromere antibodies (ACA) with negative anti-topoisomerase I (anti-Scl-70) and negative anti-RNA polymerase III. What is the most significant, life-threatening long-term pulmonary vascular complication that requires annual screening with transthoracic echocardiography in this patient?

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A 29-year-old female with no prior chronic medical history presents with sudden-onset swelling, erythema, and severe pain in her left lower extremity, confirmed on duplex ultrasound as an extensive unprovoked left iliofemoral deep vein thrombosis. Her obstetric history reveals two consecutive unexplained spontaneous first-trimester pregnancy losses and one intrauterine fetal demise at 22 weeks of gestation with normal fetal morphology. Laboratory investigations demonstrate: normal platelet count, normal renal function, prolonged baseline activated partial thromboplastin time (aPTT) that fails to correct on a 1:1 mixing study with normal pooled plasma, and a positive dilute Russell viper venom time (dRVVT) test with confirmation by excess phospholipid neutralization. What are the formal diagnostic criteria required to definitively establish Antiphospholipid Syndrome (APS)?

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A 34-year-old female is brought to the emergency department with fluctuating confusion, expressive aphasia, and visual hallucinations. Her family notes that she had a mild upper respiratory infection one week ago. On physical examination, she is febrile (38.4 C), pale, mildly jaundiced, and has scattered petechiae and ecchymoses on her extremities. Laboratory evaluation demonstrates: hemoglobin 7.2 g/dL, platelet count 14,000/uL, reticulocyte count 8.5%, total bilirubin 4.1 mg/dL (indirect 3.4 mg/dL), LDH 1,850 U/L (markedly elevated), haptoglobin < 10 mg/dL (undetectable), serum creatinine 1.8 mg/dL, and normal PT, aPTT, and fibrinogen. Peripheral blood smear reveals numerous schistocytes (4–5 per high-power field). What is the underlying pathophysiological mechanism and the immediate life-saving therapy of choice?

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A 22-year-old previously healthy male presents with 3 weeks of daily high spiking fevers (up to 39.8 C), severe fatigue, and progressive abdominal distention. Physical examination reveals marked pallor, jaundice, generalized lymphadenopathy, and massive splenomegaly (palpable 8 cm below the left costal margin). Laboratory results reveal: pancytopenia (Hb 6.8 g/dL, WBC 1,800/uL, platelets 32,000/uL), serum ferritin 28,500 ng/mL (profoundly elevated), fasting triglycerides 480 mg/dL, fibrinogen 85 mg/dL (hypofibrinogenemia), AST 340 IU/L, and soluble interleukin-2 receptor (sCD25 / sIL-2R) elevated at 14,200 U/mL. Bone marrow aspirate reveals numerous histiocytes engulfing erythrocytes, leukocytes, and platelets (hemophagocytosis). What life-threatening hyperinflammatory syndrome does this patient fulfill, and what is the standard protocol-directed therapy?

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A 76-year-old male with non-valvular atrial fibrillation taking dabigatran etexilate 150 mg twice daily is brought to the trauma center following a severe motor vehicle collision. Non-contrast head CT reveals a large acute left subdural hematoma with 8 mm midline shift requiring emergent craniotomy. His last dose of dabigatran was taken 3 hours prior. His activated partial thromboplastin time (aPTT) is 82 seconds and thrombin time (TT) is >120 seconds. What is the specific, immediate reversal agent of choice indicated prior to neurosurgical intervention?