Ovarian Leydig cells (OLC): A histomorphological and immunohistochemical study.

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.

[Usefulness of urine cytology for bladder carcinoma diagnosis: comparative study with biopsy]. / Utilidad de la citología de orina para el diagnóstico del carcinoma vesical: estudio comparativo con biopsia.

OBJECTIVES: Traditionally, urine cytology has been considered as the gold standard for bladder cancer screening. However, new methods are playing new roles in these cases. In order to assess the value of cytology of voided urine we performed one comparative study between cytology and biopsy. METHODS: We retrospectively analyzed the results of urine cytology and biopsy follow-up in 109 patients. All cytologies were from voided urine. They were cytocentrifuged and stained with Papanicolaou stain. RESULTS: We found 70 true positive cases and 24 true negative cases. Sensitivity was calculated to be 97% and specifity 96-100%. 12 cases had the first cystoscopy test and biopsy negative, as the cancer was diagnosed in the second biopsy. CONCLUSIONS: Patients with clearly positive urine cytology, which was not confirmed in a first cystoscopic study, should be carefully followed up to identify a possible bladder or upper urinary tract cancer. The urine cytology still has a significant role as the gold standard for bladder cancer screening.

Utilidad de la citología de orina para el diagnóstico del carcinoma vesical: estudio comparativo con biopsia / Usefulness of urine cytology for bladder carcinoma diagnosis: comparative study with biopsy

Objetivo: La citología de orina se ha considerado la técnica de elección para el cribado de carcinoma vesical. La existencia de otros métodos diagnósticos adicionales, han puesto en duda su utilidad. Aportamos un estudio comparativo cito-histológico para comprobar su valor. Método: Hemos realizado un estudio retrospectivo de 109 biopsias vesicales en relación con los diagnósticos citológicos previos. Todas las citologías eran de micción espontánea, procesadas por citocentrifugación y teñidas con Papanicolaou. Resultados: Encontramos 70 casos verdaderos positivos, y 24 casos verdaderos negativos, consiguiendo una sensibilidad del 97% y una especificidad del 96-100%. Destacando que 12 casos positivos tenían la primera cistoscopia y biopsia negativa, diagnosticándose la neoplasia en la segunda biopsia. Conclusiones: Los pacientes con citologías de orina claramente positivas, que no se confirman en una primer estudio citoscópico, deben ser seguidos, para identificar una posible neoplasia vesical o de vías urinarias altas. La citología de orina puede seguir considerándose como una técnica de elección para el cribado y control de neoplasia vesical (AU)

Objectives: Traditionally, urine cytology has been considered as the gold standard for bladder cancer screening. However, new methods are playing new roles in these cases. In order to assess the value of cytology of voided urine we performed one comparative study between cytology and biopsy. Methods: We retrospectively analyzed the results of urine cytology and biopsy follow-up in 109 patients. All cytologies were from voided urine. They were cytocentrifuged and stained with Papanicolaou stain. Results: We found 70 true positive cases and 24 true negative cases. Sensitivity was calculated to be 97% and specifity 96-100%. 12 cases had the first cystoscopy test and biopsy negative, as the cancer was diagnosed in the second biopsy. Conclusions: Patients with clearly positive urine cytology, which was not confirmed in a first cystoscopic study, should be carefully followed up to identify a possible bladder or upper urinary tract cancer. The urine cytology still has a significant role as the gold standard for bladder cancer screening (AU)