title: Ovarian Leydig cells (OLC): A histomorphological and immunohistochemical study.
abstract: Testicular Leydig cells (LC) regulate the proper development of male individuals, both during fetal life (fetal LC) and puberty (adult LC). In the ovaries of adult women, there are cells that are very similar to Leydig cells, the ovarian hilus cells (OHC), which also produce testosterone. The origin of these cells, in both sexes, remains unknown and is still a matter of debate. We have studied the location, characteristics and relationships of the OHC in 90 patients. The indications for oophorectomy were: metrorrhagia (n=9), prolapse (n=8), endometrial hyperplasia (n=14), cancer (endometrial, myometrial, or cervical) (n=35), uterine leiomyomata (n=14), and various ovarian tumors (cysts and benign tumors, borderline and malignant) (n=10). In addition to the hilus, occasionally the nodules, nests and clusters of OHC were located in the mesovarium, the mesosalpinx, and in the medullar and cortical regions of the ovaries. The morphological (including crystalloids of Reinke) and immunohistochemical (positivity for calretinin and alpha-inhibin) findings were similar to those described for testicular LC. Therefore, OHC can be considered ovarian Leydig cells (OLC). LC are usually found in small numbers in the ovaries, but if one looks for them intentionally, one always finds them. Close relationships were observed between the OLC with nerves and vessels. Moreover, an intraneural location of the OLC was demonstrated in all cases, and these intraneural cells showed similar characteristics to extraneural OLC, suggesting that they derive from endoneural cells which are present in the vegetative nerves of the ovaries.
authors.affiliation: Department of Basic Medical Sciences, Faculty of Health Sciences, Medicine Section, University of La Laguna, Tenerife, Spain. jcarraju@ull.edu.es.
authors.forename: J L
authors.initials: JL
authors.lastname: Carrasco-Juan
authors.affiliation: Department of Basic Medical Sciences, Faculty of Health Sciences, Medicine Section, University of La Laguna, Tenerife, Spain.|Service of Pathology, Canary University Hospital Complex, Tenerife, Spain.
authors.forename: H
authors.initials: H
authors.lastname: Álvarez-Argüelles Cabrera
authors.affiliation: Service of Pathology, Canary University Hospital Complex, Tenerife, Spain.
authors.forename: M C
authors.initials: MC
authors.lastname: Martín Corriente
authors.affiliation: Department of Basic Medical Sciences, Faculty of Health Sciences, Medicine Section, University of La Laguna, Tenerife, Spain.
authors.forename: M
authors.initials: M
authors.lastname: González-Gómez
authors.affiliation: Department of Basic Medical Sciences, Faculty of Health Sciences, Medicine Section, University of La Laguna, Tenerife, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Valladares Parrilla
authors.affiliation: Department of Basic Medical Sciences, Faculty of Health Sciences, Medicine Section, University of La Laguna, Tenerife, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Gutiérrez García
authors.affiliation: Department of Basic Medical Sciences, Faculty of Health Sciences, Medicine Section, University of La Laguna, Tenerife, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Díaz-Flores
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007985:Leydig Cells / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009474:Neurons / Q000378:metabolism / Q000473:pathology; D010049:Ovarian Diseases / Q000473:pathology / Q000601:surgery; D010052:Ovariectomy; D010053:Ovary / Q000294:innervation / Q000378:metabolism / Q000473:pathology*