Solitary intra-articular tumoral calcinosis of the knee.

An unusual case of symptomatic, solitary, intra-articular tumoral calcinosis of the knee in a 39-year-old man is presented. This is the first reported case of intra-articular tumoral calcinosis with no associated underlying systemic diseases. Magnetic resonance imaging was helpful in delineating the lesion. Surgical excision resulted in resolution of symptoms and was not followed by recurrence of the lesion.