Benign mixed Müllerian (duct) vaginal tumor in a 12-y-old goat

In human and veterinary medicine, mixed Müllerian tumors (MMTs) are rarely diagnosed neoplasms of the tubular female genital tract. Although there are case reports of malignant MMTs in various species, benign MMTs have only been described once in a macaque. Here we present a case of benign MMT in a 12-y-old goat, and review the literature on uterine, cervical, and vaginal neoplasia in goats. The doe was presented with vaginal discharge and was euthanized because of the high suspicion of intraabdominal neoplasia. On gross examination, an ulcerated vaginal mass was identified. Histologically, 2 distinct cell populations were present: smooth muscle cells that were well differentiated and positive for alpha–smooth muscle actin, and ciliated columnar epithelial cells that lined ductal structures and had no signs of malignancy. These findings led to the diagnosis of neoplasia of Müllerian origin. Benign MMT should be considered as a differential diagnosis for uterine and vaginal neoplasms in goats.

Gynecologic Malignancies in Children and Adolescents: How Common is the Uncommon?

The aim of this study is to assess the projected incidence and prognostic indicators of gynecologic malignancies in the pediatric population. In this population-based retrospective cohort study, girls ≤18 years with ovarian, uterine, cervical, vaginal and vulvar malignancies diagnosed between 2000 and 2016 were identified from the Surveillance, Epidemiology and End Results (SEER)-18 registry. The Kaplan–Meier method was used to analyze overall survival (OS). The age-adjusted annual incidence of gynecologic malignancies was 6.7 per 1,000,000 females, with neoplasms of the ovary accounting for 87.5%, vagina 4.5%, cervix 3.9%, uterus 2.5% and vulva 1.6% of all gynecologic malignancies. Malignant germ-cell tumors represented the most common ovarian neoplasm, with an increased incidence in children from 5–18 years. Although certain subtypes were associated with advanced disease stages, the 10-year OS rate was 96.0%. Sarcomas accounted for the majority of vaginal, cervical, uterine and vulvar malignancies. The majority of vaginal neoplasms were observed in girls between 0–4 years, and the 10-year OS rate was 86.1%. Overall, gynecologic malignancies accounted for 4.2% of all malignancies in girls aged 0–18 years and the histologic subtypes and prognosis differed significantly from patients in older age groups.

On the study of vaginal neoplasms

In view of the comparative rarity of connective tissue and muscle neoplasms of the vagina (the number of published cases does not exceed 70), the author reports the following two observations.

Carcinoma epidermoide de neovagina en paciente con síndrome de Mayer-Rokitansky-Küster-Hauser. Reporte de un caso y revisión de la literatura

Objetivo: presentar el caso de una paciente con síndrome de Mayer-Rokitansky-Küster-Hauser, con diagnóstico de carcinoma escamoso en neovagina, y realizar una revisión de la literatura del tratamiento y pronóstico de las neoplasias o la infección por VPH de tejidos neovaginales en mujeres transgénero o con síndrome MRKH. Materiales y métodos: mujer de 56 años de edad que consulta en un hospital universitario regional de la ciudad de Sevilla (España). Tras la exploración clínica se aprecia una tumoración exofítica en fondo de vagina, con resultado de biopsia de carcinoma escamoso y cultivo positivo para virus del papiloma humano (VPH) tipo 16. Se realizó una búsqueda bibliográfica en la base de datos Medline vía PubMed, con los términos: “congenital abnormalities”; “mullerian aplasia”; “neovagina”; “vaginal neoplasms”; “squamous carcinoma”; “HPV infection”, de reportes y series de caso, y estudios observacionales publicados desde el año 2000 hasta octubre de 2019 en inglés y español. Resultados: se incluyeron 14 estudios; de estos, siete correspondieron a carcinoma escamocelular, tres a adenocarcinoma y cuatro informan infección solo por VPH. Todos los carcinomas escamocelulares presentaban estadios avanzados por compromiso local o linfático y recibieron radioterapia con quimioterapia concomitante o cirugía radical. El pronóstico fue malo en tres de los casos. Las pacientes con adenocarcinoma también presentaron lesiones avanzadas con compromiso local, el tratamiento fue quirúrgico, con quimioterapia concomitante en dos de los casos. Solo una paciente tuvo seguimiento mayor a cinco años. La infección por VPH es frecuente en mujeres sometidas a construcción de neovagina. Conclusiones: las pacientes con neovagina son susceptibles de desarrollar carcinomas escamosos si se utilizaron injertos cutáneos, o adenocarcinomas en aquellas en las que se reconstruyó la vagina a partir de injertos tisulares intestinales. Dado que al momento del diagnóstico presentan compromiso local, a menudo requieren tratamientos radicales o combinados. Se debe investigar cuáles son las mejores estrategias de tamizaje de VPH, cáncer escamoso y adenocarcinoma en este tipo de pacientes.