Why the Liver Exam Matters in Every Specialty
Liver disease is common, frequently undiagnosed, and leaves its fingerprints across the body. You will encounter these findings in the emergency department, on general medicine wards, in preoperative assessments, and in outpatient clinics. The exam doesn't require a hepatologist to perform — it requires knowledge of what to look for and what it means.
General Appearance and Vitals
- Jaundice: Scleral icterus appears before skin jaundice, typically at bilirubin >2.5 mg/dL. Assess sclera in natural light.
- Muscle wasting (sarcopenia): Temporal wasting, reduced interosseous muscle bulk, thin extremities with protuberant abdomen — a critical finding that carries independent prognostic significance.
- Cachexia: Advanced disease marker; correlates with frailty and poor post-transplant outcomes.
Skin and Mucosal Findings
- Spider angiomata: Telangiectasias with a central arteriole and radiating "legs," found in the distribution of the superior vena cava (face, neck, upper chest, arms). Blanch with pressure; refill from the center. More than 5 is considered significant. Result from estrogen accumulation due to impaired hepatic metabolism.
- Palmar erythema: Redness of the thenar and hypothenar eminences. Non-specific but associated with hyperestrinism.
- Leukonychia: White discoloration of the nails (Terry's nails — white with distal brown band). Reflects hypoalbuminemia.
- Dupuytren's contracture: Fibrosis of the palmar fascia causing flexion contracture of the ring and little fingers. Associated with alcohol-related liver disease.
- Caput medusae: Dilated superficial abdominal veins radiating from the umbilicus. Represent portosystemic collaterals via the recanalized umbilical vein. Distinguish from IVC obstruction (where flow is upward below umbilicus and downward above) — in portal hypertension, flow radiates outward from umbilicus in all directions.
- Gynecomastia: Breast tissue development in men, from altered estrogen-androgen ratio due to impaired hepatic metabolism.
- Testicular atrophy: Also from hormonal dysregulation.
- Prurigo nodularis / excoriation: Evidence of pruritus, common in cholestatic diseases (PBC, PSC).
Abdominal Examination
Hepatomegaly
Assess liver size by percussion (dullness over span) and palpation. Normal liver span: 6–12 cm in the midclavicular line. Causes of hepatomegaly in liver disease: early fatty liver, hepatitis, hepatic congestion. Note: cirrhotic livers are often small and shrunken (not enlarged), particularly in end-stage disease.
Splenomegaly
Splenic enlargement results from portal hypertensive congestion. An enlarged spleen strongly suggests portal hypertension, even in the absence of other findings. Palpate from the right iliac fossa upward. Percuss Traube's space (left 6th rib to anterior axillary line to costal margin) — tympany suggests no splenomegaly, dullness suggests enlargement.
Ascites
Detect with:
- Shifting dullness: Percuss from umbilicus to flank (dullness at flank), then ask patient to roll toward you — dullness shifts to the new dependent area if ascites present. Requires ~1500 mL to detect.
- Fluid wave (fluid thrill): Assistant places edge of hand on midline abdomen to dampen transmitted vibration through fat. Examiner taps one flank and feels for transmitted impulse at opposite flank. More specific but less sensitive; significant ascites required (~3000 mL).
- Puddle sign: More sensitive for smaller amounts. Patient on hands and knees — percuss umbilicus area for dullness.
Ultrasound is far more sensitive than physical examination for detecting ascites — always use imaging when clinical findings are equivocal.
Neurological Examination
- Asterixis (flapping tremor): Ask patient to extend arms, dorsiflex wrists, and spread fingers — watch for irregular, brief lapses in sustained posture (the "flap"). Reflects impaired proprioception and seen in hepatic encephalopathy, uremia, and CO₂ retention. Bilateral asterixis is a metabolic encephalopathy until proven otherwise.
- Constructional apraxia: Have patient draw a five-pointed star or connect numbered dots — difficulty suggests covert HE.
- Orientation and cognition: Assess for time/place/person disorientation, personality change, somnolence.
- Kayser-Fleischer rings: Brownish-green rings at the corneal periphery (Descemet's membrane). Pathognomonic for Wilson's disease with neurologic involvement — look with slit lamp or bright penlight in a young patient with unexplained liver disease.