Isolated fibromas of the ocular adnexa are rare. Fibromas of the tendon sheath (FTS) are benign, collagenous, spindle cell neoplasms that typically present as an acquired, painless mass in the adult extremities. They infrequently involve the head and neck. We report a case of FTS presenting as a medial canthal mass. Like most FTS, the lesion in our patient was successfully treated by complete surgical excision. While the differential diagnosis contains a variety of mesenchymal tumors, the clinical and radiographic characteristics should lead to the correct diagnosis. To our knowledge, this is the first case of FTS reported to arise at this site.

Tendinous sheath fibroma causing "trigger wrist" and carpal tunnel syndrome.Chir Main. 2006 Jun;25(2):89-91.

There are few cases described of fibroma of tendon sheath located to the hand and the wrist. A case of fibroma of tendon sheath of lumbrical muscle of the index finger has been described. The tumor was responsible of a peculiar phenomenon of "triggering" of the wrist during the movements of flexion and extension of the index finger, and caused compression of the median nerve at the carpal tunnel. The intervention has brought to an early and long lasting relief of symptoms. Moreover, the histological aspect has been described and the relatively high possibility of recurrence of this lesion is underlined.

Intra-articular fibroma of tendon sheath involving the scapholunate and radiocarpal joints.Skeletal Radiol. 2006 Aug;35(8):599-602. Epub 2005 Nov 10.

Fibroma of tendon sheath is an uncommon benign soft tissue tumor with a predilection for the hand. A unique case involving the scapholunate and radiocarpal joints with bone erosion is reported. The patient presented with a transilluminating mass over the volar radial wrist associated with neuropathy in the superficial radial nerve distribution. Magnetic resonance imaging demonstrated a heterogeneous and lobulated mass with nonspecific signal characteristics closely associated with the scapholunate interval and the volar wrist soft tissues. Histologically it represented a fibroma of tendon sheath. The tumor is discussed and the relevant literature is reviewed.