Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Hannover, Germany.
Totally Vets, Feilding, New Zealand.
N Z Vet J. 2024 Nov;72(6):341-346. doi: 10.1080/00480169.2024.2389928. Epub 2024 Aug 14.
A 4-month-old male Shih Tzu dog (Case 1) and an 11-month-old female Devon Rex cat (Case 2) were referred to specialist veterinary hospitals for evaluation of right thoracic lameness and growth abnormality in the distal aspect of the forelimb.
Non-weight-bearing lameness and decreased range of motion were noted in the affected limbs of both cases. Case 1 had a plantigrade stance, and a cleft separation between the first and second digits extending upwards to the distal third of the antebrachium. There was no pain on palpation, and the affected limb was shorter than the contralateral. Radiographic examination revealed cleft separation between metacarpal bones I and II, and carpal bone fusion (I, II, III), and the distal radius ended freely and was attached to the first metacarpal bone.Case 2 had a small cleft medial to metacarpal III. The limb was consistently held in abduction and had marked carpal varus. The limb had never been used for weight bearing. Radiographic examination showed agenesis of metacarpal bone II and separation of metacarpals I and III. The radius and ulna were separated and the radial head did not articulate normally at the elbow, leading to marked elbow incongruity.
Ectrodactyly in both cases.
Amputation of the radius followed by ulnocarpal arthrodesis were performed in both cases. Follow-up evaluations up to 1 year (Case 1) and 10 weeks (Case 2) after surgery indicated satisfactory arthrodesis fusion, owner satisfaction, and a good clinical outcome.
Ectrodactyly is a rare congenital deformity of the forelimb with a heterogeneous character, requiring an individualised treatment plan. These are the first cases reported in the literature of ectrodactyly in small animals that were treated successfully with ulnocarpal arthrodesis. This case series therefore provides evidence in support of this treatment option for this heterogeneous congenital deformity.
一只 4 月龄雄性西施犬（病例 1）和一只 11 月龄雌性德文雷克斯猫（病例 2）因右胸跛行和前肢远端生长异常被转诊至专科兽医医院进行评估。
两只病例的患病肢体均出现非负重性跛行和运动范围减小。病例 1呈跖行姿势，第一和第二指之间有裂分，向上延伸至前肢臂远端的三分之一处。触诊时无疼痛，患病肢体比对侧短。放射学检查显示掌骨 I 和 II 之间有裂分，腕骨融合（I、II、III），桡骨远端自由终止，与第一掌骨相连。病例 2在第三掌骨内侧有小的裂分。该肢体始终保持外展位，并有明显的腕骨内翻。该肢体从未用于负重。放射学检查显示第二掌骨缺如，第一和第三掌骨分离。桡骨和尺骨分离，桡骨头在肘部不能正常关节，导致明显的肘不吻合。
两只病例均为并指畸形。
两只病例均进行了桡骨截断术，随后进行尺腕关节融合术。手术后随访评估 1 年（病例 1）和 10 周（病例 2），结果显示关节融合融合良好，主人满意，临床效果良好。
并指畸形是一种罕见的前肢先天性畸形，具有异质性特征，需要个体化的治疗计划。这是首例文献报道的小动物并指畸形病例，成功采用尺腕关节融合术治疗。因此，该病例系列为这种先天性畸形提供了支持这种治疗选择的证据。
