Unilateral segmental uterine horn hypoplasia with fallopian tube aplasia in a guinea pig (Caviaporcellus).

Wernick, Morena B; D'Ovidio, Dario; Ruetten, Maja; Howard, Judith (2024). Unilateral segmental uterine horn hypoplasia with fallopian tube aplasia in a guinea pig (Caviaporcellus). Journal of comparative pathology, 208, pp. 42-44. Elsevier 10.1016/j.jcpa.2023.11.006

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A 2-year-3-month-old female guinea pig (Cavia porcellus) was referred for lethargy, weight gain and severe abdominal pain. Ultrasound examination revealed thickening and enlargement of the left uterine horn and an unremarkable right uterine horn. The animal died during ovariohysterectomy due to respiratory and cardiac arrest. Necropsy revealed unilateral segmental uterine horn hypoplasia and aplasia of the fallopian tube of the corresponding side. This is the first report of a congenital uterine malformation in the guinea pig and we describe the clinical and pathological presentation of segmental uterine horn hypoplasia and fallopian tube aplasia. Congenital uterine malformations are rare in guinea pigs but should be considered as differential diagnoses for the more common acquired uteropathies.

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