A 51-year-old man with history of type 2 diabetes and human immunodeficiency virus infection presented with a 3-year history of worsening swelling of the left wrist associated with pain and numbness in the fingers. Physical examination was notable for an extension deficit in the proximal interphalangeal joint of all four fingers. Magnetic resonance imaging (MRI) showed multiple loose bodies in the ulnar bursal fluid. The patient underwent surgery and this image was taken. What was the diagnosis?
A) Pigmented villonodular synovitis (PVNS)
B) Reichel syndrome
C) Calcium hydroxyapatite deposition disease
D) Fibrolipomatous hamartoma of ulnar nerve
E) Mycobacterial tenosynovitis