Surgical Treatment of Tenosynovitis of Extensor Tendons of Fourth Compartment of Wrist in Nonrheumatoid Patients-A Case Series of 10 Patients in India.

Proliferative tenosynovitis of the extensor tendons is a very common painful wrist condition that can occur both in presence and absence of rheumatoid arthritis (RA). This study aims to evaluate a series of patients without RA, having extensor tendon tenosynovitis, its pathology, and results of surgical treatment. A consecutive series of 10 patients without RA, having tenosynovitis of fourth extensor compartment were treated surgically and evaluated in the study. All patients were operated upon by a single surgeon, and intraoperative specimens were sent for histopathologic evaluation by a single pathologist. The functional outcome of the patients was evaluated by comparing the post- and preoperative wrist extension. All patients presented with painful mass over dorsum of the wrist, overlying the fourth extensor compartment. On clinical examination, there was severe limitation of active wrist extension with extended fingers and improvement in wrist extension on flexing the fingers. All patients had significant improvement in wrist extension after surgery. The histopathologic examination of the intraoperative samples revealed similar findings of tenosynovitis in all cases, which was different than that seen in RA. This study reveals a distinct tenosynovitis in a group of patients without RA resembling traumatic tenosynovitis on histopathologic examination. Radiologic and intraoperative findings reveal presence of nodular mass in the affected tendon due to proliferative tenosynovitis, which blocks effective proximal excursion of the tendon, leading to decreased wrist extension. This study shows that surgical treatment in the form of tenosynovectomy gives excellent relief to these patients. This is a Level IV, therapeutic study.