Answers with Explanations

Question 1 - "Belly of a Jellyfish" Sign

• History of chronic hepatitis progressing over years
• Liver: enlarged (+5 cm), dense, nodular - classic cirrhosis
• Low albumin (28 g/l), low prothrombin index (65%), thrombocytopenia - signs of liver failure and portal hypertension
• Fluid shifting on percussion (ascites)
• The vascular pattern described on the anterior abdominal wall IS caput medusae

Question 2 - Calculating Heart Rate on ECG

• Each large cell (big square) = 5 mm = 0.2 seconds
• Therefore 300 large squares = 60 seconds = 1 minute
• Formula: HR = 300 / number of large squares between two consecutive R waves (RR interval)

• "Count QRS in 6 seconds × 6" - this method is used for irregular rhythms, not the most accurate for regular rhythms
• "Divide 600 by large cells" - incorrect; 600 applies to a speed of 50 mm/sec
• "Divide 300 by large cells between P waves" - P waves are used for atrial rate, and the PP interval can differ from RR in conduction blocks; for heart rate we use RR
• "Divide 1500 by small cells between T waves" - 1500/small squares works for the RR interval at 25mm/sec, but measuring between T waves is incorrect (should be R to R); however 1500/small squares is actually mathematically equivalent to 300/large squares. The error here is measuring T-to-T instead of R-to-R.

Question 3 - Normal Chest X-Ray Sign

• Horizontal fluid level - indicates hydropneumothorax or an abscess (air-fluid level)
• Increased pulmonary pattern in root zones - suggests pulmonary congestion or hilar lymphadenopathy
• Darkening in lower lobe projections - could indicate consolidation, atelectasis, or effusion
• Mediastinal displacement - is abnormal, seen with large effusions, pneumothorax, collapse, or masses

Question 4 - Macropreparation Diagnosis

• Patient is 17 years old (ADPKD typically manifests in adults, but can present earlier)
• Bilateral involvement (both kidneys)
• Family history: father had renal failure at 55 - ADPKD is autosomal dominant (50% inheritance)
• Hypertension (150/95 mmHg), hematuria, proteinuria, flank pain - all classic features
• Creatinine elevated (145 μmol/l) - reduced GFR
• Ultrasound confirms multiple cysts bilaterally

• Autosomal recessive PKD - presents in infancy/neonates with a different morphology (small uniform cysts, dilated collecting ducts)
• Chronic pyelonephritis - shows scarring and contraction, not cystic replacement
• FSGS - a glomerular disease, not visible as macrocysts
• Renal dysplasia - congenital, not familial autosomal dominant pattern

Question 5 - Blood Pressure Assessment in an 8-Year-Old

• Normal systolic BP: approximately 96-112 mmHg (50th-90th percentile)
• Normal diastolic BP: approximately 57-74 mmHg
• This patient's BP = 100/60 mmHg - falls comfortably within the normal range

Question 6 - Type of Immunodeficiency

• DiGeorge: T-cell deficiency (low CD3+), not the case here
• Selective IgA deficiency: only IgA reduced, rest normal; B cells present
• Wiskott-Aldrich: triad of eczema, thrombocytopenia, immunodeficiency; BTK not implicated
• Gray platelet disease: a platelet disorder, not an immunodeficiency

Question 7 - Cell Wall Characteristic of the Pathogen

• A thin peptidoglycan layer (inner)
• An outer membrane containing lipopolysaccharide (LPS/endotoxin)
• The outer membrane is the key structural feature distinguishing them from Gram-positive bacteria

• Lack of peptidoglycan - describes mycoplasmas
• Thick peptidoglycan - describes Gram-positive organisms (Staph, Strep)
• Thin peptidoglycan (alone, without outer membrane) - incomplete description
• Mycolic acids - describe mycobacteria (TB, leprosy)

Question 8 - Acid-Base Imbalance

1. pH > 7.45 → Alkalosis
2. pCO₂ is low (27 mmHg) → Primary respiratory cause (hyperventilation)
3. HCO₃⁻ is normal → No metabolic compensation yet → Acute (not chronic)
4. BE is normal → No metabolic component

Question 9 - Signs of Broncho-Obstructive Syndrome (BOS)

1. Dry (expiratory) wheezing - the most specific sign; occurs as air is forced through narrowed bronchi during exhalation
2. Prolonged expiration - expiratory phase is longer than inspiratory
3. Normal or symmetrical chest excursion - the chest wall moves normally (unlike in pleural disease or pneumothorax)

• Dry wheezing on exhalation ✓
• SpO₂ 94% - mild hypoxia
• History consistent with bronchial asthma (atopic family history, nocturnal cough, response to anti-asthma medications)

• Shortened percussion + weakened breathing + asymmetry → consolidation, pneumonia, pleural effusion
• Crepitation → alveolar disease (pneumonia, pulmonary edema), not obstruction
• Wet wheezing increasing on inhalation → bronchiolitis or pneumonia, not typical BOS
• Pleural friction rub + tenderness → pleuritis

Question 10 - Sign of Renal Origin Edema

• During the night, when lying flat, fluid redistributes to the face and periorbital tissues (loose connective tissue with low tissue pressure)
• Gravity is not a factor during sleep
• By the end of the day, the face edema may actually improve

Question 1 - Revisited: "Belly of a Jellyfish" Sign

What "Belly of a Jellyfish" / Caput Medusae Actually Is

"An extensive plexus of veins is seen emanating from the umbilical region and radiating across the anterior abdominal wall." - Goldman-Cecil Medicine

"Systemic vessels that radiate from para-umbilical veins enlarge and become visible on the abdominal wall." - Gray's Anatomy for Students

The Key Issue: Does Pulsation Belong Here?

1. Dilated veins in the right hypochondrium with pulsation - wrong location
2. Pulsation of dilated veins on the anterior abdominal wall - marked correct
3. Pain and muscle tension in the right hypochondrium - unrelated
4. Tension of the anterior abdominal wall with protrusion of the navel - describes ascites under tension
5. Dilated veins in the lower abdomen without pulsation - wrong location

• Option 1: wrong location (right hypochondrium only)
• Option 2: correct location (anterior abdominal wall) - despite mentioning pulsation, this is the only option that correctly identifies the anterior abdominal wall distribution
• Option 5: wrong location (lower abdomen only, without pulsation)

All Questions - Translated from Kazakh & Answered

Question 01 (Chest X-ray - Round Shadow Dissemination)

1. Round opacity with clear, uniform contours and preserved surrounding lung pattern - solitary round darkening
2. Reduction in the volume of the affected area with segmental or lobar form - local darkening
3. One or multiple uniform or non-uniform scattered small focal shadows in one or several lung fields, without signs of volumetric effect
4. Diffuse increase in lung pattern and deformation due to vascular component
5. Areas of increased lung transparency along the vascular pattern

• Multiple small shadows (foci) scattered across one or both lung fields
• No volumetric effect (no collapse, no shift of mediastinum, no fissure displacement) - this is the key differentiating feature
• The foci are distributed diffusely, not forming a single mass

• Option 1: Describes a single round shadow (nodule/mass) - that IS round shadow syndrome, not dissemination
• Option 2: Describes atelectasis or collapse - a volume-reducing process
• Option 4: Describes pulmonary congestion / interstitial edema
• Option 5: Describes emphysema or pneumothorax (increased lucency)

Question 02 (Abdominal pain - McBurney's Point)

1. (Selected/correct) Pain at the McBurney point - located at the junction of the middle and outer thirds of a line connecting the right anterior superior iliac spine to the umbilicus
2. Pain in the left subcostal region - located on a line connecting the middle of the spine to the left costal margin at the Mayo-Robson point projection
3. Pain in the right iliac region along the line connecting the iliac crests, at the Dejardin point, 5-6 cm above the umbilicus
4. Pain in the right subcostal region at the Kehr point, found with deep palpation with the patient's right arm raised
5. Pain in the right iliac region that intensifies at the Obraztsov point with active tension of the iliopsoas muscle

• On a line drawn from the right anterior superior iliac spine (RASIS) to the umbilicus
• At the junction of the outer 1/3 and inner 2/3 (i.e., 1/3 of the way from the ASIS)
• Tenderness here = McBurney's sign = highly suggestive of appendicitis

• Mayo-Robson point - pancreatic pain (pancreatitis), left costovertebral angle
• Dejardin point - also pancreatic (head of pancreas)
• Kehr's sign - left shoulder pain from diaphragm irritation (e.g., splenic rupture)
• Obraztsov's sign (psoas sign) - pain with right hip extension, seen in retrocecal appendicitis

Question 03 (Heart Murmur - Systolic murmur at apex)

1. Acute right heart failure
2. Mitral valve insufficiency (regurgitation)
3. VSD (ventricular septal defect) - interventricular septal defect
4. Pericarditis
5. Pulmonary valve stenosis

• The mitral valve is located at the apex (left 5th intercostal space, midclavicular line)
• In mitral regurgitation, blood leaks backward from the left ventricle into the left atrium during systole
• This creates a holosystolic (pansystolic) or decreasing murmur heard best at the apex, often radiating to the left axilla
• This patient has hypertension (which causes left ventricular hypertrophy and dilation, stretching the mitral valve annulus, causing functional mitral regurgitation)

• Acute right heart failure: murmur would be at the tricuspid area (left lower sternal border), not apex
• VSD: harsh pansystolic murmur at the left lower sternal border (3rd-4th intercostal space), not at the apex
• Pericarditis: produces a friction rub (scratching sound), not a murmur
• Pulmonary stenosis: murmur heard at the pulmonary area (2nd left intercostal space), not the apex

Question 04 (Urinalysis - Acute Pyelonephritis)

1. (Selected/correct) Pyuria, bacteriuria, moderate proteinuria - characteristic of acute pyelonephritis
2. Bacteriuria-free pyuria, absence of proteinuria - characteristic of cystitis
3. Leukocyturia with moderate bacteriuria, glucose-negative - characteristic of urinary tract infection
4. Significant proteinuria with erythrocyturia, leukocytosis - characteristic of nephrotic syndrome
5. Leukocyte-free and bacteria-free mild proteinuria - characteristic of minimal kidney damage

• Leukocytes 15-20 in HPF (normal 0-5) = Pyuria (pus cells in urine)
• Bacteria +++ = Bacteriuria
• Protein 0.3 g/L = mild/moderate proteinuria
• Erythrocytes 3-5 = mild hematuria

• Leukocytosis (12×10⁹/L) with neutrophilia (78%) = bacterial infection
• Elevated ESR (28 mm/hr) = inflammation

• Fever + right flank pain + pyuria + bacteriuria + neutrophilic leukocytosis = classic presentation

Question 05 (Chest X-ray with multiple nodules - Macropreparation)

• Mutations in PKD1 (chromosome 16, polycystin-1) or PKD2 (chromosome 4, polycystin-2) genes
• These proteins normally regulate cell proliferation and fluid secretion in tubular epithelium
• Defective polycystins lead to abnormal tubular epithelial cell proliferation + fluid accumulation → cyst formation
• Cysts progressively enlarge, compressing and destroying normal parenchyma
• Eventually leads to end-stage renal disease (as in the father at age 55)
• The macropreparation shows bilateral, massively enlarged kidneys replaced by numerous cysts - the gross hallmark of ADPKD

Question 06 (ECG - Bradycardia/Syncope)

1. Sinus bradycardia with pauses >2.5 seconds - ECG sign
2. QRS widening >0.12 sec - ECG sign
3. ST segment elevation >1 mm - ECG sign
4. PR interval shortening <0.12 sec - ECG sign
5. Sinus tachycardia >90 bpm - ECG sign (highlighted/selected in image)

• Severe bradycardia (42 bpm)
• Irregular rhythm
• Syncope/presyncope episodes (Stokes-Adams attacks)
• Age 72 with CAD history (post-MI sinus node disease)
• Previous beta-blocker use (which may have unmasked underlying sinus node dysfunction)

Question 07 (Bone Marrow - Peripheral Blood Smear)

1. Immature lymphocytes at early stages of development only
2. Erythroblasts at various stages of development in the bone marrow
3. Megakaryocytes regulating platelets in the bone marrow
4. Cells of the granulocyte series at various stages of development
5. Plasma cells actively synthesizing immunoglobulins

• Large cells with dark purple nuclei of varying sizes and shapes (myelocytes, metamyelocytes, band cells)
• Hypersegmented neutrophils
• A left shift of the granulocyte series - immature granulocytes appearing in peripheral blood

• Age 20, male
• Splenomegaly (6 cm below costal margin) - hallmark of CML
• Hepatomegaly (2 cm)
• WBC 12×10⁹/L with myelocytes, metamyelocytes in peripheral blood
• Thrombocytosis (platelets 520×10⁹/L)
• Basophilia and eosinophilia - the absolute classic finding in CML
• Hb mildly reduced (96 g/L)

Question 08 (ECG with answer choices - continued from Question 06)

1. ECG sign of sinus bradycardia with pauses >2.5 sec
2. ECG sign of QRS widening >0.12 sec
3. ECG sign of ST elevation >1 mm
4. ECG sign of PR interval shortening <0.12 sec
5. ECG sign of sinus tachycardia >90 bpm (appears highlighted)

Question 09 (Allergy - Type of Allergic Reaction)

1. Immediate type (I)
2. Cytotoxic (II)
3. Immunocomplex (III)
4. Delayed type (IV)
5. Undetermined

• Mediated by IgE antibodies bound to mast cells and basophils
• On re-exposure to allergen (citrus fruits), IgE cross-linking → mast cell degranulation → release of histamine, leukotrienes, prostaglandins
• This causes: urticaria (hives), itching, skin rash - appearing within minutes of exposure
• Basophilia (5%) in this patient is consistent with ongoing allergic/IgE-mediated process