Acta Vet. Brno 2021, 90: 207-210

Hyperplastic and atrophic changes in the genital tract of a female cat following repeated treatment with deslorelin acetate – a case report

Gabriele Marino1, Cecilia Vullo2, Stefania Di Giorgio1, Antonina Zanghì1, Giuseppe Catone1, Alessandra Sfacteria1

1University of Messina, Department of Veterinary Sciences, Messina, Italy
2University of Messina, Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, Messina, Italy

Received December 19, 2020
Accepted May 26, 2021

This study aimed to investigate the morphological patterns of the genital tract after long-term treatment of deslorelin acetate in a female cat, a gonadotropin-releasing hormone agonist currently used in adult cats to obtain transient oestrus suppression. A 1-year-old Chartreux female cat was treated with 4.7 mg deslorelin acetate to suppress oestrus manifestations. The treatment was repeated for a total of × 3 every 2 years. After 8 years, the female cat came into oestrus again, but she was no more implanted, and an ovariohysterectomy was performed. Before surgery, an ultrasound examination was performed that showed a normal uterus and the presence of about 5 follicles in ovaries. Concentrations of oestradiol, progesterone, and vaginal smears were compatible with oestrus. During surgery, a very short ovarian pedicle was observed yet neither uterus nor ovaries presented appreciable alterations. At histology, the ovaries presented a juvenile appearance with numerous primordial and periovulatory follicles. The uterus showed marked endometrial hyperplasia with polypoid projection and atrophic myometrium. Based on this case report, deslorelin acetate is a powerful drug able to preserve ovarian function. However, the suppression of gonadotrophin, especially for a long period, has a detrimental atrophic effect on the target organs during treatment and, on the opposite, hyperplastic changes may occur after the restoring of normal cyclicity.


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