The patient's complaints suggested injury to the meniscus, but radiography, MRI, and biopsy revealed a different cause.

These cysts, named for their radiographic appearance and common in younger patients, comprise approximately 1% of bone tumors.

Shortness of breath and occasional chest pain signal a vascular anomaly in a middle-aged woman.

A 55-year-old male presented to the emergency department with history of vomiting. He appeared acutely ill and complained of experiencing excruciating lower left chest pain. He had a history of coronary artery disease and was an alcoholic. He had undergone prior surgical procedures that included cholecystectomy and coronary artery bypass graft surgery. The ECG demonstrated tachycardia but no signs of acute MI. His pulse was 120 beats per minute; BP was 130/70 mm Hg; and his respiratory rate was 28 breaths per minute.

A 19-year-old woman presented to the emergency department with a history of seizures. At presentation, she had an elevated BP and was noted to be about 34 weeks' pregnant.

A 73-year-old female presented to the emergency department with nontraumatic abdominal pain in the right lower quadrant (RLQ).

A 50-year-old male presented with neck pain, which he described as beginning at the base of the skull and radiating downward. Three weeks previously, he had had a four-wheeler accident but never sought medical attention.

A 13-year-old boy presented to the clinic for the evaluation of right hip pain. He stated that he was playing soccer and felt a "pop" after kicking the ball. On physical examination, his vital signs were normal. He was able to stand but experienced mild right hip pain with walking; no swelling or bruising was visible. There was tenderness with palpation about the right hip. Internal and external rotation of the hip was normal, but therewas mild pain.

An 80-year-old man presented with right upper quadrant abdominal pain. He denied nausea, vomiting, diarrhea, or constipation. Urinalysis results were negative and the WBC count was normal, but liver function values were elevated. The patient had no history of alcohol abuse but did have chronic hepatitis C. A physical examination revealed tenderness over the right upper quadrant and hepatomegaly. The patient did not appear jaundiced.

An 83-year-old male with an osteoporotic compression fracture of the second lumbar vertebra (L2), sustained in a fall, complained of continuing pain despite conservative treatment for the past 3 weeks.