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Titolo:
DOES THE GUBERNACULUM MIGRATE DURING INGUINOSCROTAL TESTICULAR DESCENT IN THE RAT
Autore:
LAM SKL; CLARNETTE TD; HUTSON JM;
Indirizzi:
ROYAL CHILDRENS HOSP,DEPT GEN SURG PARKVILLE VIC 3052 AUSTRALIA ROYAL CHILDRENS HOSP,DEPT GEN SURG PARKVILLE VIC 3052 AUSTRALIA ROYAL CHILDRENS HOSP,F DOUGLAS STEPHENS SURG RES LAB PARKVILLE VIC 3052 AUSTRALIA
Titolo Testata:
The Anatomical record
fascicolo: 2, volume: 250, anno: 1998,
pagine: 159 - 163
SICI:
0003-276X(1998)250:2<159:DTGMDI>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
TESTIS;
Keywords:
INGUINOSCROTAL TESTICULAR DESCENT; GUBERNACULAR MIGRATION; GUBERNACULAR EVERSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
S.K.L. Lam et al., "DOES THE GUBERNACULUM MIGRATE DURING INGUINOSCROTAL TESTICULAR DESCENT IN THE RAT", The Anatomical record, 250(2), 1998, pp. 159-163

Abstract

Background: The role of the gubernaculum in descent of the testis is controversial, The mechanism of testicular descent has been studied inthe rat, because inguino-scrotal descent occurs postnatally in this species. Several authors have claimed that the cremasteric sac forms byeversion of the gubernacular cone, whereby regression of the extraabdominal part of the gubernaculum creates a space into which the gubernacular cone everts to form the processus vaginalis within the scrotum, This postulated lack of any gubernacular migration phase contrasts with the situation in the human, where gubernacular migration appears to be an integral component of testicular descent. This study was designed to determine in the rat whether there is any gubernacular migration toward the scrotum during testicular descent, or whether eversion of the cremasteric sac alone could account for the extension of this sac into the bottom of the scrotum. Methods: Oblique sagittal sections of the inguino-perineal region were taken from rats aged 21 days of gestation and days 1, 3, 4, 6, 8, and 10 days postnatally. Histological sections were examined and the following measurements were obtained: gubernacular cone height, gubernaculum-scrotum distance, processus vaginalis length, and pubic symphysis-anus distance, Results: The gubernaculumwas not in close proximity to the developing scrotum at any age. After 21 days of gestation, there was little evidence of a substantial gubernacular bulb distal to the processus vaginalis, At all ages the gubernacular cone height was significantly less than the distance from thegubernaculum to the scrotum, Conclusions: These results show that thegubernaculum does not develop in close proximity to the developing scrotum. Even if complete eversion of the gubernaculum takes place, the gubernaculum would still fail to reach the bottom of the scrotum. It is proposed that gubernacular eversion is more apparent than real and that some degree of gubernacular migration is needed for complete extension of the cremasteric sac to the bottom of the scrotum. (C) 1998 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:58:57