Episode 457 – The Clinical Unknown Series with Dr. Ravi Singh

This episode of The Clinical Problem Solvers features a rich, multi-system case of a 53-year-old woman presenting with progressive abdominal distension, fatigue, weight loss, and signs of volume overload including elevated JVD, peripheral edema, and hepatosplenomegaly. The discussion unfolds through a collaborative, structured approach, with Dr. Ravi Singh guiding a team of clinical learners—Rahul, Debra, and Mark—through differential diagnosis, imaging, and lab interpretation. Key findings include elevated liver enzymes, hypercalcemia, a high protein gap, and imaging revealing hepatic vein thrombosis and cardiac abnormalities. The team initially considers conditions like heart failure, malignancy, and granulomatous disease, but the diagnosis ultimately reveals a rare and aggressive presentation of light chain multiple myeloma with systemic AL amyloidosis, manifesting as Budd-Chiari syndrome. The case highlights the importance of broad differential thinking, integrating physical exam with lab and imaging data, and recognizing paradoxical presentations—such as amyloidosis causing thrombosis instead of bleeding. The episode concludes with a powerful lesson in clinical reasoning under uncertainty and the value of systematic, team-based case dissection. Key takeaways include: 1) Always consider multi-system disease in patients with weight loss and organomegaly; 2) A high ALP with cholestasis and ascites should prompt evaluation for infiltrative or obstructive processes; 3) Hepatic vein thrombosis in a non-cirrhotic patient is a red flag for underlying malignancy or amyloidosis; 4) Cardiac amyloidosis can present with apical sparing on echo and low voltage on EKG; 5) Even in the absence of an M-spike, a markedly elevated kappa/lambda ratio can indicate clonal plasma cell disorders; 6) Amyloidosis can paradoxically cause thrombosis via multiple mechanisms despite typically being associated with bleeding; 7) A comprehensive workup including SPEP, free light chains, and bone marrow biopsy is essential in suspected systemic amyloidosis; 8) Never assume a single diagnosis explains all findings—split data and consider overlapping pathologies.