In simple words: Chronic osteomyelitis with a draining sinus in the femur is a persistent bone infection in the thigh bone. The infection causes pus to drain through an abnormal opening in the skin. This condition often occurs after a previous bone infection, fracture, or surgery.

Chronic osteomyelitis with a draining sinus tract of the femur refers to a long-standing infection and inflammation of the bone tissue within the thigh bone. This condition is characterized by the presence of an abnormal passage, or sinus tract, that extends from the infected bone to the skin surface, allowing pus to drain. It often arises from inadequately treated or untreated acute osteomyelitis, open fractures, or surgical complications.

Example 1: A 55-year-old male with a history of a compound femur fracture two years prior presents with persistent pain, swelling, and a draining sinus in his right thigh. Imaging reveals chronic osteomyelitis with a draining sinus tract of the right femur., A 30-year-old female with poorly controlled diabetes develops a foot ulcer that progresses to chronic osteomyelitis of the femur with a draining sinus. Despite antibiotic therapy, the infection persists, requiring surgical debridement and prolonged antibiotic treatment., A 70-year-old male undergoes total hip arthroplasty and subsequently develops a deep infection. The infection spreads to the adjacent femur, resulting in chronic osteomyelitis with a draining sinus. The patient undergoes revision surgery and prolonged antibiotic therapy.

Documentation should include evidence of chronic infection (e.g., duration of symptoms, persistent drainage, etc.), imaging findings (e.g., X-ray, MRI, CT scan), laboratory results (e.g., elevated inflammatory markers), culture results if available, and details of any prior treatments.