Rete testis is an anastomosing network of tubules within the mediastinum testis. Each testis is suspended in a outpouching of the peritoneal cavity. Using the following terms, trace the pathway of sperm from the testes to the urethra. Paraffin embedded, 6 micron sections stained with masson. It is also near the arterial supply of the testis which comes from the testicular artery. Igcn formerly carcinoma in situ is present in about 5% of cases in the contralateral gonad of those patients with a testicular neoplasm. Testis, rete testis hyperplasia nonneoplastic lesion atlas. Primary adenocarcinoma of the rete testis is an extremely rare extratesticular neoplasm. In tubular ectasia, many cystic structures are seen within the rete testis. If the fluid is not absorbed, the person can be infertile. Describe the blood testis barrier and the cell that forms. Tubular ectasia of the rete testis is a benign condition usually found incidentally, it has a prevalence of 1. Male reproductive system ans 215 physiology and anatomy of domesticated animals. We report a case of adenocarcinoma of rete testis in 64yearold man.
Vasa efferentia from the rete testis open into the epididymis which is a highly coiled tubule. Very few cases have been reported in the literature. Sections of epididymis may therefore not contain both types of ducts. Jan 15, 2010 anatomia histologia embriologia y fisiologia renal. In peripheral area of the tumor, the remaining normal rete testis. To the best of our knowledge this is the first report of a primary clear cell carcinoma of the rete testis. Describe the process of spermatogenesis and the cytology of the cells involved in that process. Well go over the different structures within each testis and. It is located within a highly vascular connective tissue in the mediastinum testis. The testes are two ovalshaped organs in the male reproductive system. A set of electron micrographs demonstrates normal, benign, and malignant pathologic. Primary adenocarcinoma of rete testis with distinct biphasic. Pdf in the mammalian testis, peritubular myoid cells pmcs surround seminiferous tubules.
Associated lesions such as sperm stasis and seminiferous tubule dilation should not be diagnosed separately unless warranted by severity, but should be described in the pathology narrative. Tissues were collected from 4 adult animals, fixed in bouin, gendre, zenker and in 10 % neutral formalin fixatives for histologic preparation. The tumor is positive for ae, wt1 and calretinin and is negative for sall4 and inhibin. Partial obstruction to the outflow of fluid from the testis is the most common cause of rete testis dilation, and this can be incidental or chemically induced. Tubular ectasia of the rete testis is a rare, benign, cystic lesion of the testis. Such lesions require careful scrutiny including immunohistochemical analysis to exclude malignant lesions such as mesothelioma or papillary serous carcinoma. The tumor was predominantly composed of irregular small tubules and papillary structures with cuboidal or polygonal cells. The anatomy, histology and development of the testis, epididymis and ductus deferens. Helping the student recognize the microscopic structural features of. Recognize sertoli cells and leydig cells, and explain their roles in the production of sperm and regulation of the male reproductive system. Testes develop retroperitoneally on the posterior abdominal wall and descend to scrotum before birth. The rete testis is an anastomosing network of delicate tubules located in the hilum of the testicle. Start studying exercise 27 anatomy of the reproductive system.
This article outlines the diagnostic criteria of tert, its possible causes, its incidence and its potential evolution. A 46yearold male complained of swelling and pain in the right side of the scrotum. Rete tubular ectasia is a benign condition, usually found in older men, involving numerous small, tubular cystic structures within the rete testis. The epithelial cells form a single layer that lines the inner surface of the tubules. Primary tumours of the rete testis, either benign or malignant, are very rare. Tubular ectasia of rete testis radiology reference. The scrotum is often asymmetric, with one testis extending further down than the other. The testicular artery is convoluted and is surrounded by the venous pampiniform plexus for heat exchange. What is the function of the cavernous bodies seen in the male penis. If the testis is biopsied, it is usually for fertility. In all cases, the rete testis appeared hyperplastic and the other components efferent ductules, epididymus well preserved. The rete testis is a dilated intratesticular structure located directly under the tunica albuginea at the cranial pole of the testis fig. Most of the time it is discovered incidentally on scrotal sonograms and may be misinterpreted as malignant. The activity of the cilia helps to move the spermatozoa along the tube, as they are immobile until they reach the epididymis.
His first diagnosis was hydrocele of left testis, but aspiration cytology showed malignancy. Testes is paired organ suspended in scrotum by spermatic cord each testis is attached to an epididymis, which connects rete testis to vas deferens testis is composed of convoluted seminiferous tubules in a stroma with leydig cells. The seminiferous tubules start and end at the rete testis. Within the left testis, tubular cystic areas are seen near mediastinum of testis tubular ectasia of the rete testes. Cystic dysplasia of the testis is a rare congenital defect that results in the formation of numerous irregularly shaped cystic spaces in the mediastinum testis. These tubules connect the seminiferous tubules to an anastomosing labyrinth of epitheliumlined channels, the rete testis. Around the testis, the parietal peritoneum is named tunica vaginalis while the visceral peritoneum is named tunica albuginea.
The clinical presentation of such a disorder usually occurs in the paediatric age group as an asymptomatic scrotal swelling that can mimic testicular tumours. The rete testis in turn leads through numerous small efferent ductules from the mediastinum into the epididymis. Histology of testis testis is covered by tunica vaginalis tunica albuginea tunica vasculosa tunica albuginea is a thick white fibrous connective tissuecalled capsule of testis deep to the capsule, there is tunica vasculosa which is a highly vascularised connective tissue. Case report, ultrastructural observations, and clinicopathologic correlates. There is still little knowledge about its etiology and pathogenesis. Primary adenocarcinoma of rete testis is one of the rarest intrascrotal tumors. Rete testis hyperplasia should be diagnosed and graded whenever present. The rete testis is the network of interconnecting tubules where the straight seminiferous tubules the terminal part of the seminiferous tubules empty. May 04, 2010 the tubules are convoluted and have the form of loops at whose ends the lumen narrows and continues in short segments, known as straight tubules, or tubulirecti. It carries sperm from the seminiferous tubules to the vasa efferentia.
These cells mature through the initial phases of spermatogenesis and then move into the straight seminiferous tubules which eventually empty into the rete testis found within the mediastinum testis. Three cases of cystic ectasia of the rete testis were diagnosed over the sixyear period, in all the indication for ultrasound was testicular pain. These spermatozoacontaining cysts communicate with the tubular system into the epididymis. The formation of cysts in the rete testis is associated with the obstruction of the efferent ducts, which connect the rete testis with the head of the epididymis. The testis, plural testes, are important for survival of the species. A case of adenocarcinoma of the rete testis accompanied by. This low power photograph of the testis shows its basic organisation. The cutup of orchiectomy specimens is dealt with in orchiectomy grossing. The rete testis have concentrated sperm and fluid in them, and they help the epididymis to absorb this fluid. Ultrastructural evidence for phagocytosis of spermatozoa in the bovine rete testis and testicular straight tubules. Thus, the epithelial cells of the rete testis do not appear to be only involved in the uptake of substances from the lumen and their disposal by the lysosomal system, but also appear to contribute to the transport of certain macromolecules from the lumen to the laterobasal surfaces of the cells. Each of these lobes contains one to four, which converge on a tubular region at the testis hilus called the.
This condition is more common in men over the age of 55 years. Its function is to provide a site for fluid reabsorption. Due to its low occurrence and the scarcity of data, sonographic characteristics of adenocarcinoma of the rete testis are still poorly defined. The epididymis has three parts 1head or caput epididymis it is the proximal part of the epididymis.
A set of electron micrographs demonstrates normal, benign, and malignant pathologic findings as seen by use of electron microscopy. Manuals for preparation and performance of routine and special stains, and manuals for laboratory safety, are available in acrobat pdf format electron microscopy. Rete testis the rete testis connects the seminiferous tubules to the ductus efferentes. Aug 19, 2014 the anatomy, histology and development of the testis, epididymis and ductus deferens. Abstracts 2019 anatomia, histologia, embryologia wiley. Bilateral ductal ectasia of the rete testis longdom publishing sl. The objectives for examining microscopic slides as part of a course in basic histology include. Histology and anatomy for medical education webpath. Ultrastructural evidence for phagocytosis of spermatozoa in the. It is usually asymptomatic and seen on ultrasound as an incidental finding. Epidemiology this condition is more common in men over the age of 55 years.
Tubules lined by low cuboidal to flat cells which may be vacuolated but are not watery clear as seen in primary epididymal adenocarcinoma low grade nuclear features mesothelial origin ihc for mesothelial markers usually positive. Carcinoma embrionario testicular con neoplasia intratubular. Webpathology is a free educational resource with 10312 high quality pathology images of benign and malignant neoplasms and related entities. Male reproductive system the university of arizona. No fat to maintain temperature lower than rest of body contains. The germinal epithelium suddenly ends with begin of the rete testis, forming a kind of valve to prevent the backflow of spermatozoa. They are contained within the scrotal sac, which is located directly behind the penis and in front of the anus. Can you also identify the seminiferous tubules, which open into a network of anastomosing channels called the rete rete net testis at the mediastinum testes. Waalkes sertoli cell tumors are, except in dogs, rare testicular neo plasms. Mixed sertolileydig cell tumor and rete testis adenocarcinoma in rats treated with cdci, s. It is the counterpart of the rete ovarii in females.
Describe the histology of and identify, in order, the passageways through which sperm pass as they exit from the body. Pdf identification and characterization of myosin from rat. Herein, we present a case of rete testis adenocarcinoma in a 36yearold chinese male. Testis, rete testis dilation nonneoplastic lesion atlas.
Endocytosis in epithelial cells lining the rete testis of the. Histology of the testis, epididymis and spermatogenesis. Rete testis simple english wikipedia, the free encyclopedia. Tubular ectasia of rete testis radiology reference article. Rete testis is a network of small tubules found in the part of the testicle that carries sperm. The anatomy, histology and development of the testis. Tutorials, images, and examination questions in histology to illustrate cells and tissues in a variety of organ sites. Tubular ectasia of rete testis represents dilated testicular mediastinal tubules.
The definitive pathological report showed a right embryonal carcinoma with wide intratubular germ cell neoplasia igcn of the contralateral testis. Tubular ectasia of the rete testis tert is a benign entity due to dilation of the tubules of the rete testis. It is lined by ciliated cuboidal epithelial cells that also contain microvilli. In humans the testes occur as a pair of ovalshaped organs. The average size after puberty measures to around 2 inches in length, 0. Exercise 27 anatomy of the reproductive system flashcards. The rete testis was examined in the domestic goat capra hircus by light microscopic means. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Histology of the male reproductive system learning objectives.
Can you identify the thick collagenous capsule on the outside called the tunica albuginea. The testis is divided into a number of lobes by connective tissue. Male anatomy 10 medical university of south carolina. Centered on testicular hilum, associated with transition to normal rete testis. Zur entwicklung des pferdehodens zur entwicklung des pferdehodens knospe, c. This portion of the testis is known as the mediastinum. Male reproductive system introduction grading scheme should be used in documenting commonly occurring lesions in male reproductive tissues if treatmentrelated exacerbation of common background changes is suspected. This study revealed that the seminiferous tubules originate from the sex cords of the coelomic epithelium and leydig cells from the proximal part of. Name the three layers of the uterine wall from the inside out. The transitional tubules and the tubuli recti can be mistaken for atrophic seminiferous tubules see male reproductive system introduction for normal histology of rete testis. Histology of testis by dr mohammad manzoor mashwani.
This is a benign condition thought to result from the partial or complete obliteration of the efferent ducts. This cavity, like the rest of the peritoneum, is lined by a serosa consisting of mesothelial cells supported by a fibrous connective tissue. Effects of estrogens on the testis of transsexuals. After their descent, the testes remain connected with the abdomen by spermatic cords, and attached to the scrotum by the testicular ligament. Pathology this is a benign condition thought to result from the partial or complet. For images of the rete testis or the efferent ductules, consult your textbook or check out the male reproductive section of uc davis histo quizorama.
The lesion was located in the proximity of the mediastinal rete testis 6. There is also an extratesticular multicystic lesion seen abutting head and body of epididymis. Testis, plural testes, also called testicle, in animals, the organ that produces sperm, the male reproductive cell, and androgens, the male hormones. Size of testis in healthy european males, the average volume of each testicle is 18cm2. Zur entwicklung des pferdehodens, anatomia, histologia. The efferent ductules proved to be the only structure where er can be located by the erica procedure, whereas staining for the p 29 erassociated antigen is strongly positive both here and in the rete testis. In addition, presence of biphasic component creates difficulty in the diagnosis. Histology of testis by dr mohammad manzoor mashwani 1.
718 761 593 1243 1138 1396 99 320 624 685 720 919 662 153 736 1477 915 869 1187 1009 1347 532 128 461 702 17 1025 1412 194 486 1199 634 1073 1390 394 1165