Magee A A, Ragle C A, Hines M T, Madigan J E, Booth L C
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman 99164, USA.
J Am Vet Med Assoc. 1997 Mar 15;210(6):804-7.
Enlarged anorectal lymph nodes can cause colic in young horses by obstructing the caudal aspect of the rectum. Dyschezia and clinical signs consistent with abdominal pain were the predominant reasons for evaluation of the 5 young (3 to 15 month old) horses of this report. Digital transrectal palpation revealed a firm mass obstructing the caudal aspect of the rectum in each horse. Results of cytologic evaluation of the masses revealed a lymphoid population of cells in 4 of 5 horses. These nodes regressed over time or became abscesses and drained into the rectum. In 1 horse, detection of a mature abscess and concomitant dysuria necessitated immediate surgical drainage of the mass; however, the other 4 horses were successfully managed medically, thereby avoiding risks associated with surgery of the perirectal area. Anorectal lymphadenopathy should be considered as a differential diagnosis in young horses with colic.
增大的肛门直肠淋巴结可通过阻塞直肠尾部导致幼马绞痛。排便困难和与腹痛一致的临床体征是本报告中5匹幼马（3至15月龄）接受评估的主要原因。经直肠指检发现每匹马的直肠尾部均有一个坚实的肿块阻塞。对肿块的细胞学评估结果显示，5匹马中有4匹马的细胞为淋巴细胞群。这些淋巴结随时间消退或形成脓肿并排入直肠。在1匹马中，检测到一个成熟的脓肿并伴有排尿困难，因此需要立即对肿块进行手术引流；然而，其他4匹马通过药物治疗成功治愈，从而避免了直肠周围区域手术相关的风险。对于患有绞痛的幼马，应将肛门直肠淋巴结病视为鉴别诊断之一。
