The approach to clinical conundrums by an expert clinician is revealed through the presentation of an actual patient's case in an approach typical of a morning report. Similarly to patient care, sequential pieces of information are provided to the clinician, who is unfamiliar with the case. The focus is on the thought processes of both the clinical team caring for the patient and the discussant. A 51-year-old man presented with severe pain and swelling in the lower anterior right thigh. He stated that the symptoms limited his movement, and began 4 days prior to this presentation. He rated the pain severity a 10 on a 10-point scale. He denied fevers, chills, or history of trauma or weight loss.Cellulitis of the lower extremity is the most likely possibility, but the presence of severe pain and swelling of an extremity in the absence of trauma should always make the clinician consider deep-seated infections such as myositis or necrotizing fasciitis. An early clue for necrotizing fasciitis is severe pain that is disproportionate to the physical examination findings. Erythema, bullous lesions, or crepitus can develop later in the course. The absence of fever and chills also raises the possibility of noninfectious causes such as unrecognized trauma, deep vein thrombosis, or tumor.The patient had a 15-year history of type 2 diabetes complicated by end-stage renal disease secondary to diabetic nephropathy for which he had been on hemodialysis for 5 months, proliferative diabetic retinopathy that rendered him legally blind, hypertension, and anemia. He stated that his diabetes had been poorly controlled, especially after he started dialysis.A history of poorly controlled diabetes mellitus certainly increases the risk of the infectious disorders mentioned above. The patient's long-standing history of diabetes mellitus with secondary nephropathy and retinopathy puts him at higher risk of atherosclerosis and vascular insufficiency, which consequently increase his risk for ischemic myonecrosis. Diabetic amyotrophy (diabetic lumbosacral plexopathy) is also a possibility, as it usually manifests with acute, unilateral, and focal tenderness followed by weakness involving a proximal leg. However, it typically occurs in patients who have been recently diagnosed with type 2 diabetes mellitus or whose disease has been under fairly good control and usually is associated with significant weight loss.The patient was on oral medications for his diabetes until 1year before his presentation, at which point he was switched to insulin therapy. His other medications were amlodipine, lisinopril, aspirin, sevelamer, calcitriol, and calcium and iron supplements. He denied using alcohol, tobacco, or illicit drugs. He lives in Chicago and denies a recent travel history. His family history was significant for type 2 diabetes in multiple family members.The absence of drugs, tobacco, and alcohol lowers the risk of some infectious and ischemic conditions. Patients with alcoholic liver disease who live in the southern United States are predisposed t...