Videoassisteddiagnosis and treatment for Leydig cell tumor in a bitch with remaining ovary syndrome
Keywords:
Ovarian neoplasm, remnant ovary, video surgery, dogAbstract
Primary ovarian neoplasms are uncommon in bitches, requiring more accurate diagnostic and therapeutic methods. Females also have steroid-secreting interstitial cells, however, the appearance of the Leydig cell tumor is considered rare. A 12-year-old mongrel bitch showed signs of estrus after prepubertal ovariohysterectomy. Ultrasound evaluation located a mass in the right lateral abdominal region, suggestive of a remaining ovary. During laparoscopic exploration, the mass was identified caudally distant from the right ovarian stump, adhered to the jejunal mesentery. The intestinal segment was apprehended and exteriorized by video-assisted technique, and removal of the tumor was performed associated with enterectomy of the affected segment. Evaluation of the left ovarian stump revealed a 0.5cm diameter cyst that was also removed. Histopathological analysis was suggestive of interstitial cell neoplasia (Leydig cell tumor) and an ovarian epithelial cyst. The Leydig cell tumor is frequently related in males, however, its appearance in bitches is considered uncommon, affecting mainly non-sterile animals. The mass non-adhered to the ovarian stump proves that remnants of ovarian tissue that may be free in the abdominal cavity and may be responsible for the development of the remaining ovary syndrome and neoplasms. The prognosis for ovarian neoplasms without metastasis is favorable, especially when surgical intervention is applied as a therapeutic method. The use of video surgery to assist in the diagnosis and treatment was considered appropriate for the case described, but it must be complemented by histopathological analysis.
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