Sanchez Villamil Carlos, Llanos Diez Cesar, Thomas Grace, Garty Rachel, Lappalainen Marianne, Klever Julius, Hardas Alexandros
The Royal Veterinary College Department of Clinical Science and Services, Hatfield, Hertfordshire, UK.
The Royal Veterinary College Department of Pathobiology and Population Sciences, Hatfield, Hertfordshire, UK.
JFMS Open Rep. 2024 Sep 10;10(2):20551169241269323. doi: 10.1177/20551169241269323. eCollection 2024 Jul-Dec.
An 8-year-old male neutered domestic shorthair cat was presented with an acute onset of left thoracic limb lameness and a firm swelling on the lateral aspect of the left distal antebrachium. A CT scan of the left thoracic limb revealed an expansile osteolytic cystic bone lesion centred at the distal left ulnar metaphysis. Cytology from fine-needle aspiration was not consistent with neoplasia. The CT features and the cytology results were suggestive of a bone cyst. A distal partial ulnectomy with ulnar styloid process excision was performed as the biopsy method and as the treatment approach. Histopathology results were consistent with an aneurysmal bone cyst (ABC). Carpal instability was not detected after distal partial ulnectomy; therefore, a stabilisation method was not required. Limb function was excellent after surgery, with no lameness and no recurrence detected by the owner at 2, 6 and 24 weeks postoperatively. The veterinary examination at 12 weeks postoperatively confirmed the owner's outcome assessment.
To the authors' knowledge, this is the first report describing a distal partial ulnectomy with ulnar styloid process excision in a cat. Despite disrupting the short ulnar collateral ligament, this technique provided excellent short-term limb function with no need for carpal joint stabilisation. This technique allowed for the complete excision of a distal ulnar ABC and avoided cyst debridement, which could be associated with haemorrhage, recurrence and malignant transformation. Distal partial ulnectomy should be considered for distal ulnar bone lesions in cats.
一只8岁已绝育的雄性家养短毛猫因左前肢急性跛行及左前臂远端外侧出现坚实肿胀而就诊。左前肢的CT扫描显示，一个以左尺骨远端干骺端为中心的膨胀性溶骨性囊性骨病变。细针穿刺细胞学检查结果与肿瘤不符。CT特征和细胞学结果提示为骨囊肿。采用远端部分尺骨切除术并切除尺骨茎突作为活检方法和治疗手段。组织病理学结果与动脉瘤样骨囊肿（ABC）一致。远端部分尺骨切除术后未检测到腕关节不稳定；因此，不需要稳定方法。术后肢体功能良好，术后2周、6周和24周主人均未发现跛行及复发情况。术后12周的兽医检查证实了主人的评估结果。
据作者所知，这是首例描述猫远端部分尺骨切除术并切除尺骨茎突的报告。尽管该技术破坏了短的尺侧副韧带，但仍提供了良好的短期肢体功能，无需进行腕关节稳定。该技术能够完整切除尺骨远端ABC，避免了可能与出血、复发和恶性转化相关的囊肿清创。对于猫的尺骨远端骨病变，应考虑采用远端部分尺骨切除术。
