A 10-year-old boy injured his left elbow during football practice. He subsequently had pain with normal range of motion of the elbow. He had minimal tenderness over his olecranon but no joint swelling, bruising, or palpable mass
A 23-year-old woman who reported experiencing direct trauma to her right knee on a hard surface 3 months earlier was admitted to the arthroscopy unit with complaints of decreased range of motion (flexion, 90°; extension, 75°) and intractable pain.
A 52-year-old man with long-standing seropositive, erosive rheumatoid arthritis (RA) presented to our clinic with a mass on his left elbow (left). He had noticed it 2 years earlier—the mass had been painless, but it had gradually increased in size.
For 2 months, a 29-year-old man had pain and circular, soft swelling (7 x 7 cm in diameter) over the anterior left knee, superficial to the patellar ligament. Pain was minimal and associated with extension and flexion).