Leadbeater J C, Gutierrez-Nibeyro S D, Brown J A
Scone Veterinary Hospital, Scone, New South Wales, Australia.
Aust Vet J. 2010 Jan;88(1-2):20-4. doi: 10.1111/j.1751-0813.2009.00534.x.
A 13-year-old Morgan gelding was examined for right forelimb lameness and tenosynovitis of the right common carpal sheath of the digital flexor tendons. The horse had moderate right forelimb lameness at the trot and marked effusion of the right common carpal sheath of the digital flexor tendons. Ultrasonographic examination revealed a soft tissue mass within the proximal pouch of the affected tendon sheath, located adjacent to the distal physis of the radius. Cytology and culture of the fluid revealed a sterile, eosinophilic tenosynovitis. Tenoscopic exploration confirmed the presence of a capsulated soft tissue mass. Thecotomy was required to fully debride the mass, which histology revealed to be a mast cell tumour. At 22 months postoperatively, the horse developed mild right forelimb lameness and eosinophilic tenosynovitis because of recurrence of the mastocytoma. Mastocytosis is a possible differential diagnosis in any horse exhibiting lameness associated with tenosynovitis. Surgical excision combined with rest and postoperative intrasynovial and systemic corticosteroids may be palliative.
一匹13岁的摩根种公马因右前肢跛行及右指屈肌腱总腱鞘腱鞘炎接受检查。该马在小跑时右前肢中度跛行，右指屈肌腱总腱鞘有明显积液。超声检查发现患腱鞘近端囊内有一软组织肿块，位于桡骨远端骨骺附近。对液体进行细胞学检查和培养显示为无菌性嗜酸性腱鞘炎。关节镜探查证实存在一个有包膜的软组织肿块。需要进行腱鞘切开术以彻底清除肿块，组织学检查显示为肥大细胞瘤。术后22个月，由于肥大细胞瘤复发，该马出现右前肢轻度跛行和嗜酸性腱鞘炎。肥大细胞增多症是任何表现出与腱鞘炎相关跛行的马匹可能的鉴别诊断。手术切除结合休息以及术后关节内和全身性使用皮质类固醇可能具有缓解作用。
