Other cyst of bone, left thigh

This code signifies the presence of a non-neoplastic, fluid-filled or semi-solid sac within the bone of the left thigh. These cysts are typically benign and can be asymptomatic or cause localized pain, swelling, or pathological fractures.

Apply this code when documentation specifies a bone cyst in the left femur, without further classification as an aneurysmal bone cyst, solitary bone cyst, or osteofibrous dysplasia. Supporting documentation includes imaging reports (X-ray, MRI, CT) identifying the cyst and physician notes confirming its location and non-specific nature.

• Ensure laterality is clearly documented as "left thigh" or "left femur."
• Avoid using this code if a more specific type of bone cyst (e.g., aneurysmal bone cyst, solitary bone cyst) is identified.
• Always review imaging and pathology reports to confirm the nature and location of the cyst.