Ryan O'Keefe @ROKeefeMD

Daily Pearl(s): The Paradox of Weight Loss and Anasarca The combination of weight loss and anasarca is a powerful clinical paradox, suggesting severe protein loss, a profound inflammatory state causing hypoalbuminemia and/or mechanical lymphatic obstruction (retroperitoneal lymphadenopathy). Source: CPS - April 26, 2026 Academy w/ Rabih & Academy Candidate Javier - Fever & Pancytopenia

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Daily Pearl(s): Gaucher's Disease Gaucher's disease is the most common lysosomal storage disorder, caused by a deficiency of the enzyme glucocerebrosidase (GBA). This leads to the accumulation of its substrate, glucocerebroside, within the lysosomes of macrophages, forming "Gaucher cells." These lipid-laden cells infiltrate various organs, leading to a variable clinical picture that often mimics rheum, heme, and infectious diseases. Hepatosplenomegaly is a classic finding due to the infiltration of Gaucher cells in the reticuloendothelial system. Bone pain, lytic lesions, pathologic fractures, and avascular necrosis are common. Anemia and thrombocytopenia are frequent due to bone marrow infiltration and hypersplenism. Gaucher's disease confers a significantly increased lifetime risk of hematologic malignancies, particularly multiple myeloma and other gammopathies. Patients require lifelong screening with SPEP, UPEP, and serum free light chains. The chronic inflammation can manifest as fever, arthritis, and marked hyperferritinemia, mimicking adult-onset Still's disease. Source: CPS - April 25, 2026 Simplicity in Complexity - rheumatoid arthritis in the setting of a febrile illness

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Daily Pearl(s): Primary Pancreatic Lymphoma Primary Pancreatic Lymphoma is a rare extranodal presentation of non-Hodgkin lymphoma, with DLBCL being the most common subtype. It accounts for less than 1% of all pancreatic malignancies and can be a critical mimic of the much more common pancreatic adenocarcinoma. While it can encase major vessels like the SMA or SMV, it often does so without causing significant stenosis or thrombosis, a feature that can help distinguish it from adenocarcinoma. DLBCL is a "great mimicker" and can present as a localized mass in almost any organ system; it should be considered in the differential for atypical masses, even when initial imaging suggests a more common local primary tumor. Source: CPS - April 21, 2026 VMR with Ravi & Kirtan - right-sided abdominal pain

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Daily Pearl(s): Pulse Pressure A wide pulse pressure (ex: 111/45 mmHg) can be a subtle sign of significant underlying cardiovascular disease, such as severe atherosclerosis or aortic insufficiency, which contributes to hemodynamic fragility. Source: CPS - April 20, 2026 Mainstream Mondays VMR with Ethan & Magnus - dizziness and low back pain

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Daily Pearl(s): HFpEF and AFib Patients with HFpEF are particularly dependent on atrial contraction for ventricular filling and are highly susceptible to hemodynamic compromise during AFib. Source: CPS - April 20, 2026 Mainstream Mondays VMR with Ethan & Magnus - dizziness and low back pain

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Daily Pearl(s): "Incidental" ANA as a Red Herring A positive ANA, especially at a moderate titer like 1:320, is a common incidental finding in healthy women and must be interpreted in the context of a compatible clinical syndrome to be considered significant. Source: CPS - April 16, 2026 VMR w/Rabih & Krishna - acute onset pain, numbness, discoloration of R index finger

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Daily Pearl(s): Achenbach Syndrome vs Ischemic Digits Achenbach syndrome is characterized by the spontaneous development of a hematoma on the volar aspect (underside) of a digit. It is a diagnosis of exclusion, often misdiagnosed as an ischemic or vascular occlusive event. The classic presentation involves a sudden onset of pain or a burning sensation in a finger, followed rapidly by swelling and blue-purple (violaceous) discoloration. It typically affects one finger and is more common in middle-aged women. The presence of preserved capillary refill and pulses is a critical finding that strongly argues against significant arterial occlusion and points toward a non-vascular emergency like a hematoma. True critical digital ischemia typically presents with severe pain, pallor or frank cyanosis (not just bruising), and critically, absent or severely delayed capillary refill. Source: CPS - April 16, 2026 VMR w/Rabih & Krishna - acute onset pain, numbness, discoloration of R index finger

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Daily Pearl(s): Esophageal Rupture / Boerhaave Syndrome The classic presentation is "Mackler's triad" of vomiting, chest pain, and subcutaneous emphysema, but this is present in less than 20% of cases. Patients more commonly present with non-specific signs of sepsis, shock, chest pain, or dyspnea, often mimicking more common conditions like myocardial infarction, pulmonary embolism, or pneumonia. An extremely low pleural fluid pH (<6.5) and high pleural fluid amylase are pathognomonic for esophageal rupture, reflecting contamination with gastric acid and saliva. While Boerhaave syndrome classically causes a left-sided hydropneumothorax, it can present with bilateral effusions and may lack overt pneumomediastinum on initial imaging. Source: CPS - April 14, 2026 VMR with Ravi & Debora - nausea and vomiting

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Daily Pearl(s): Light Chain Multiple Myeloma In light chain myeloma, malignant plasma cells exclusively produce and secrete monoclonal free light chains (kappa or lambda) without the corresponding heavy chain. Light chains are not detected on standard serum protein electrophoresis (SPEP) but are identified by the serum free light chain (SFLC) assay. The classic presentation of light chain myeloma is captured by the CRAB criteria: hyperCalcemia, Renal insufficiency, Anemia, and Bone lesions. However, the order of prevalence is more accurately reflected by the BARC mnemonic: Bone lesions, Anemia, Renal failure, hyperCalcemia. Myeloma causes AKI through several mechanisms, most commonly cast nephropathy, where excessive filtered light chains precipitate in and obstruct the renal tubules. While myeloma typically causes a normocytic anemia from marrow infiltration, co-existing pathology like severe iron deficiency from chronic blood loss can be present and must be treated as well. Source: CPS - April 13, 2026 Mainstream Mondays VMR with Youssef & Seeme - fatigue and lightheadedness

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Daily Pearl(s): Pancreatitis Lipase, while more specific than amylase, is not perfectly specific for pancreatitis. It can be falsely elevated in DKA/HHS, renal failure, and mesenteric ischemia, creating significant diagnostic pitfalls. The pathophysiology of severe pancreatitis involves two distinct processes: local autodigestion leading to necrosis and fluid collections, and a systemic vascular leak syndrome causing multi-organ failure like ARDS and shock. Severe, palpable epigastric tenderness is a classic and crucial clue, suggesting local peritonitis from the inflamed pancreas. It can also help differentiate it from other, less tender causes of epigastric pain like PUD. Source: CPS - April 11, 2026 Academy with Rabih - pancreatitis