A 4-Month-Old Boy with Gradual Swelling of the Arm A 4-month-old boy presented with swelling of the right forearm that he had experienced for 2 months. His parents had previously consulted another hospital 1 month prior where fine-needle aspiration cytology showed only inflammatory cells. The child was brought to our hospital as the swelling continued to progress in size. The…

A 53-Year-Old Man with Long-Term Finger Pain A 53-year-old, right-hand–dominant man presented with pain over the volar aspect of the middle phalanx of the left index finger; he had experienced this pain for the past 2 years. He also reported sensitivity to cool temperature and exquisite tenderness to pressure at the same location. His history was notable for a fishhook injury to…

An 18-Year-Old Man with Persistent Hip Pain An 18-year-old man with no major medical history presented to our sports medicine clinic with right hip pain. He had started experiencing pain 1.5 months before presentation, after he kicked a punching bag. The pain improved within a day but returned 5 days later, when it woke him from sleep and kept him out of sports. He continued to…

A 64-Year-Old Man with Persistent Knee Pain A 64-year-old man with a 40-pack-year smoking history (he had stopped smoking 5 years earlier), hypertension, diabetes mellitus type II, hyperlipidemia, obesity, and pulmonary embolism was referred to our clinic for the evaluation of persistent medial left knee pain and an apparent periprosthetic fracture. He had undergone revision total…

A 67-Year-Old Man with Fever and Leg Pain A 67-year-old man presented to the emergency department reporting fever, malaise, and left lower-extremity pain. He stated that, at 6 weeks before presentation, he started having nonspecific atraumatic leg pain and was subsequently found to have an occlusive deep venous thrombosis in the left femoral, popliteal, posterior tibial, and…

A 77-Year-Old Woman with Osteoarthritis and Diabetes A 77-year-old woman underwent primary lateral unicompartmental knee arthroplasty with cemented components for severe osteoarthritis of the lateral compartment of the right knee with a valgus approximately 5°. She had diabetes mellitus and hypothyroidism, but she had not undergone a previous surgical procedure on the right knee….

A 67-Year-Old Man with Fever and Leg Pain A 67-year-old man presented to the emergency department reporting fever, malaise, and left lower-extremity pain. He stated that, at 6 weeks before presentation, he started having nonspecific atraumatic leg pain and was subsequently found to have an occlusive deep venous thrombosis in the left femoral, popliteal, posterior tibial, and…

A 31-Year-Old Man with Knee Pain Following Gym Exercise A 31-year-old man presented with left knee pain and knee locking that occurred only with flexion during squatting exercises at the gym. Eighteen years earlier, he had sustained a blow to the outstretched knee in a lacrosse event. He had been managed with immobilization followed by 3 months of physical therapy. On physical…

A 31-Year-Old Man with Knee Pain Following Gym Exercise A 31-year-old man presented with left knee pain and knee locking that occurred only with flexion during squatting exercises at the gym. Eighteen years earlier, he had sustained a blow to the outstretched knee in a lacrosse event. He had been managed with immobilization followed by 3 months of physical therapy. On physical…