A Case of Segmental Aplasia of the Uterus, Cervix, and Cranial Vagina in a Cat

Abstract

This case documents a rare set of congenital anomalies that resulted in an atypical cystic lesion in the cranial vagina of a queen. A discrete cystic lesion was identified in an 8 year old intact female domestic shorthair cat presenting for routine ovariohysterectomy. Morphological, radiographic, and histopathological findings were consistent with segmental aplasia of the uterus, cervix, and vagina resulting in a blind dilation of the cranial vagina. Segmental vaginal aplasia in combination with the failed canalization of the cervix resulted in a blind portion of the cranial vagina, in which normal secretions collected and became inspissated. This formed a discrete cystic structure. This case represents a novel combination and clinical presentation of segmental aplasia in the cat, involving both the uterus and cranial vagina. Ovariohysterectomy was performed for sterilization and a partial vaginectomy was performed to remove the cystic lesion in its entirety.

Disorders of sexual development in the cat: Current state of knowledge and diagnostic approach

“…The missing portion is often one uterine horn (Figure 3), 10,21,[24][25][26] but there are reports of failure of the cervix and cranial vagina to form. 21,27,28 Any remaining uterus craniad to the missing portion will be dilated and filled with fluid or inspissated contents.…”