A characteristic finding, as shown in the present case, is propagation along fascial planes, tendon sheaths
Inflammation of the tendon sheaths
causes the sheath to hypertrophy.
Pigmented villonodular synovitis (PVNS) is a rare proliferative disease that usually affects the synovial membrane of joints or tendon sheaths
resulting in joint swelling and bone erosion, affecting 2.
1-4] GCT-TS is adjudged the extra-articular equivalent of pigmented villonodular synovitis, emerging from the tendon sheaths
, bursae, or ligaments.
Therefore, reconstruction of damaged flexor tendon sheaths
with a biocompatible, diffusible membrane may not interfere with the nutrition and healing of repaired flexor tendons.
There was enhancement of the flexor pollicis longus and extensor tendon sheaths
The diffuse form, which involves the entire synovia is of a joint and often occurs in large joints; the localized nodular form with isolated circumscribed or pedunculated tissue masses in the synovial of the tendon sheaths
Ultrasonography and color Doppler imaging revealed thickening of both tendon sheaths
and superficial palmar fascia with high vascularity and heterogeneity.
Vaughan, "Radiographic anatomy of tendon sheaths
and bursae in the horse," Equine Veterinary Journal, vol.
Since the necroses in the skin are not quite superficial they can affect the tendon sheaths
progressing close to the skin.
Giant-cell tumor of the tendon sheath
(GCTTS) and pigmented villonodular synovitis belong to the same type of benign proliferative lesions originating in the synovia that usually affect the joints, bursae, and tendon sheaths
The tendon sheaths
and joints are superficial in the hand, and cat bites penetrate easily, seeding those spaces with the germ.