UWorld Internal Medicine Practice Test

The scenario presented describes a 64-year-old man experiencing hip pain that worsens with activity and is relieved by rest. This pattern of pain is characteristic of degenerative joint disease (also known as osteoarthritis), which is commonly seen in older adults.

Degenerative joint disease results from the wear and tear of cartilage in joints, leading to pain, stiffness, and sometimes functional impairment. The pain typically becomes more pronounced with activity due to increased stress on the affected joint and is alleviated during rest. In this patient's case, the hip joint is likely affected, fitting the description of hip osteoarthritis.

The age of the patient further supports this diagnosis, as degenerative joint disease is prevalent among older populations, making it a likely cause of his symptoms.