A 35-year-old man presented with left side abdominal cramps and bloody stools that persisted for 1 week. Physical examination revealed a body temperature of 38.5 °C (101.3 °F), normoactive bowel sounds, and left lower quadrant tenderness. A standing abdominal radiograph showed a nonspecific small bowel gas pattern and a smooth radiolucent descending colon without haustration (Figure 1),…

A 72-year-old man presented to the emergency department with urinary retention and increasing abdominal pain hours after undergoing transurethral resection of a bladder tumor. His initial blood pressure was 146/104 mmHg, and his pulse rate was 97 beats/min. He had abdominal distension and diffuse tenderness. His potassium level was 6.1 mEq/L, and his serum creatinine level was 2.78 mg/dL,…

A 6-week-old female infant presented to the emergency department with labial swelling. Her past medical history was unremarkable. Examination revealed a palpable 2-cm, nonreducible mass in the left labia majora without overlying skin changes or tenderness. Her vital signs were within normal age-adjusted limits. Ultrasound examination of the labia was performed (Figures 1 and 2).

An 81-year-old man presented to the emergency department with 4 hours of continuous chest pain. The ECG showed atrial fibrillation and acute extensive anterior myocardial infarction. His blood pressure was 95/69 mm Hg and pulse rate was 110 beats/min. Emergency laboratory testing showed an elevated brain natriuretic peptide level (783.0 pg/mL) and troponin I level of 41.2 ng/mL. Emergency…

A 90-year-old woman with hypertension and a previous gastric ulcer presented to the emergency department with sudden-onset, sharp, diffuse abdominal pain. She was drowsy and afebrile, with a pulse rate of 65 beats/min and blood pressure of 86/46 mm Hg. On palpation, the abdomen was diffusely tender. Her hemoglobin level was 11.4 g/dL and serum lactate level was 4.4 mmol/L. Abdominal point-of-care…