We report a case of spontaneous flexor tendon rupture in a patient with SLE.
Nonunion of the hamate hook is one of the causes of flexor tendon rupture.
SLE patients have an increased risk for osteoporosis and insufficiency fractures.
Tenosynovitis and long-term steroid use can affect tendon integrity in SLE.
SLE can lead to both tendon degeneration and insufficiency fracture of the hamate.