While stenosing tenosynovitis over the radial styloid (de Quervain's disease) is generally well recognized, the dearth of literature on the same condition in the common peroneal tendon sheath indicates that the latter is either rare or not commonly recognized.
As in de Quervain's disease at the wrist, the gross thickening of the common peroneal tendon sheath and constriction of the tendon correspond to the area of pain and of local tendernsess beneath the lateral malleolus. Relief of symptoms can be obtained by partial or total excision of the thickened tendon sheath.