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WHO Classification of Tumours
Fibroma of tendon sheath
Connective, subcutaneous and other soft tissues


Fibroma of tendon sheath (FTS) is a rare, slow-growing benign neoplasm that arises near tendinous structures, chiefly of the hands. The tumours present as small (usually <3cm), sharply-demarcated, multilobated and sometimes multinodular, fibrous masses. The nodules are histologically composed of spindled fibroblasts embedded in a collagenous stroma and separated by deep, narrow clefts.

Fibroma of tendon sheath occurs in all age groups, with a peak incidence in the fourth decade of life. Approximately 60% of patients are males. FTS does not metastasize, but involvement of tendinous structures makes complete local excision difficult; up to one fourth of lesions in the hands recur, sometimes repeatedly

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Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
3rd Edition
IARC Press: Lyon 2002