Case 1 Mitral Regurgitation - Chronic Versus Acute: Implications for Timing of Surgery.- Case 2 Cystic Fibrosis in Adults.- Case 3 Thrombotic Thrombocytopenic Purpura.- Case 4 Thyroid Abnormalities in Hyperemesis Gravidarum.- Case 5 Solitary Pulmonary Nodule.- Case 6 Acute Pericarditis.- Case 7 Asthma.- Case 8 Diabetes Mellitus and Hypertension.- Case 9 Hypothyroidism and Chest Pain in an Elderly Woman.- Case 10 Skin Lesions and Pulmonary Infiltrates in Acute Myelogenous Leukemia.- Case 11 Diagnosis and Management of Thyrotoxicosis.- Case 12 Rapidly Progressive Rosacea in an Adult Male With Flushing Attacks, Pruritus, and "Freckles".- Case 13 Refractory Ventricular Tachycardia.- Case 14 Temporal Arteritis.- Case 15 Evaluation After Acute Myocardial Infarction.- Case 16 Unusual Skin Lesions in a Patient with Diarrhea.- Case 17 Acute Pancreatitis: Diagnosis and Complications.- Case 18 Evaluation of Erectile Dysfunction.- Case 19 Weight Gain and Muscular Weakness in a Young Man.- Case 20 The Antiphospholipid Syndrome.- Case 21 Somatostatin in the Treatment of Acromegaly.