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. The testis is divided into a number of lobes by connective tissue. Sections of epididymis may therefore not contain both types of ducts. Most of the time it is discovered incidentally on scrotal sonograms and may be misinterpreted as malignant.
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. A set of electron micrographs demonstrates normal, benign, and malignant pathologic findings as seen by use of electron microscopy. Using the following terms, trace the pathway of sperm from the testes to the urethra. Within the left testis, tubular cystic areas are seen near mediastinum of testis tubular ectasia of the rete testes. 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 cavity, like the rest of the peritoneum, is lined by a serosa consisting of mesothelial cells supported by a fibrous connective tissue. Rete testis is a network of small tubules found in the part of the testicle that carries sperm. Pdf identification and characterization of myosin from rat. The lesion was located in the proximity of the mediastinal rete testis 6. Male reproductive system ans 215 physiology and anatomy of domesticated animals. The seminiferous tubules start and end at the rete testis. Well go over the different structures within each testis and. Carcinoma embrionario testicular con neoplasia intratubular.
Histology of the testis, epididymis and spermatogenesis. 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. 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. These tubules connect the seminiferous tubules to an anastomosing labyrinth of epitheliumlined channels, the rete testis. Testis, rete testis dilation nonneoplastic lesion atlas. Describe the process of spermatogenesis and the cytology of the cells involved in that process. There is still little knowledge about its etiology and pathogenesis. Tutorials, images, and examination questions in histology to illustrate cells and tissues in a variety of organ sites. Paraffin embedded, 6 micron sections stained with masson. These spermatozoacontaining cysts communicate with the tubular system into the epididymis.
The rete testis have concentrated sperm and fluid in them, and they help the epididymis to absorb this fluid. Abstracts 2019 anatomia, histologia, embryologia wiley. Rete testis the rete testis connects the seminiferous tubules to the ductus efferentes. The epithelial cells form a single layer that lines the inner surface of the tubules. Primary adenocarcinoma of rete testis is one of the rarest intrascrotal tumors. The epididymis has three parts 1head or caput epididymis it is the proximal part of the epididymis. This study revealed that the seminiferous tubules originate from the sex cords of the coelomic epithelium and leydig cells from the proximal part of. Helping the student recognize the microscopic structural features of. Igcn formerly carcinoma in situ is present in about 5% of cases in the contralateral gonad of those patients with a testicular neoplasm.
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. 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. Aug 19, 2014 the anatomy, histology and development of the testis, epididymis and ductus deferens. A case of adenocarcinoma of the rete testis accompanied by. Tubular ectasia of rete testis radiology reference article. Can you identify the thick collagenous capsule on the outside called the tunica albuginea. It is located within a highly vascular connective tissue in the mediastinum testis. Pathology this is a benign condition thought to result from the partial or complet. Ultrastructural evidence for phagocytosis of spermatozoa in the bovine rete testis and testicular straight tubules. Rete tubular ectasia is a benign condition, usually found in older men, involving numerous small, tubular cystic structures within the rete 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.
Describe the histology of and identify, in order, the passageways through which sperm pass as they exit from the body. We report a case of adenocarcinoma of rete testis in 64yearold man. Rete testis simple english wikipedia, the free encyclopedia. If the fluid is not absorbed, the person can be infertile. 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. 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.
No fat to maintain temperature lower than rest of body contains. Tubular ectasia of the rete testis tert is a benign entity due to dilation of the tubules of the rete testis. Male anatomy 10 medical university of south carolina. Recognize sertoli cells and leydig cells, and explain their roles in the production of sperm and regulation of the male reproductive system. Bilateral ductal ectasia of the rete testis longdom publishing sl.
It is the counterpart of the rete ovarii in females. What is the function of the cavernous bodies seen in the male penis. Webpathology is a free educational resource with 10312 high quality pathology images of benign and malignant neoplasms and related entities. Each testis is suspended in a outpouching of the peritoneal cavity. Tubular ectasia of rete testis radiology reference. Pdf in the mammalian testis, peritubular myoid cells pmcs surround seminiferous tubules. The average size after puberty measures to around 2 inches in length, 0. 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. Zur entwicklung des pferdehodens, anatomia, histologia. Very few cases have been reported in the literature. Due to its low occurrence and the scarcity of data, sonographic characteristics of adenocarcinoma of the rete testis are still poorly defined. It is also near the arterial supply of the testis which comes from the testicular artery. In all cases, the rete testis appeared hyperplastic and the other components efferent ductules, epididymus well preserved.
Tubular ectasia of the rete testis is a benign condition usually found incidentally, it has a prevalence of 1. Tubular ectasia of rete testis represents dilated testicular mediastinal tubules. Seminiferous tubules converge into rete testis at hilum, anastomose into efferent tubules. Tissues were collected from 4 adult animals, fixed in bouin, gendre, zenker and in 10 % neutral formalin fixatives for histologic preparation. In addition, presence of biphasic component creates difficulty in the diagnosis. Case report, ultrastructural observations, and clinicopathologic correlates. The scrotum is often asymmetric, with one testis extending further down than the other. This condition is more common in men over the age of 55 years. The rete testis was examined in the domestic goat capra hircus by light microscopic means. A 46yearold male complained of swelling and pain in the right side of the scrotum. Herein, we present a case of rete testis adenocarcinoma in a 36yearold chinese male.
Endocytosis in epithelial cells lining the rete testis of the. The activity of the cilia helps to move the spermatozoa along the tube, as they are immobile until they reach the epididymis. Centered on testicular hilum, associated with transition to normal rete testis. 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 germinal epithelium suddenly ends with begin of the rete testis, forming a kind of valve to prevent the backflow of spermatozoa. The testes are two ovalshaped organs in the male reproductive system. This is a benign condition thought to result from the partial or complete obliteration of the efferent ducts. Histology and anatomy for medical education webpath.
Primary adenocarcinoma of rete testis with distinct biphasic. 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. Male reproductive system the university of arizona. The rete testis in turn leads through numerous small efferent ductules from the mediastinum into the epididymis. There is also an extratesticular multicystic lesion seen abutting head and body of epididymis. If the testis is biopsied, it is usually for fertility. Histology of the male reproductive system learning objectives. 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. To the best of our knowledge this is the first report of a primary clear cell carcinoma of the rete testis. Rete testis is an anastomosing network of tubules within the mediastinum testis. Bilateral involvement should be recorded when present. This article outlines the diagnostic criteria of tert, its possible causes, its incidence and its potential evolution. In tubular ectasia, many cystic structures are seen within the rete testis.
Waalkes sertoli cell tumors are, except in dogs, rare testicular neo plasms. 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. The anatomy, histology and development of the testis, epididymis and ductus deferens. The anatomy, histology and development of the testis. It carries sperm from the seminiferous tubules to the vasa efferentia.
The rete testis is a dilated intratesticular structure located directly under the tunica albuginea at the cranial pole of the testis fig. The definitive pathological report showed a right embryonal carcinoma with wide intratubular germ cell neoplasia igcn of the contralateral testis. Jan 15, 2010 anatomia histologia embriologia y fisiologia renal. The testicular artery is convoluted and is surrounded by the venous pampiniform plexus for heat exchange. Exercise 27 anatomy of the reproductive system flashcards. It is usually asymptomatic and seen on ultrasound as an incidental finding. Zur entwicklung des pferdehodens zur entwicklung des pferdehodens knospe, c. The testis, plural testes, are important for survival of the species. They are contained within the scrotal sac, which is located directly behind the penis and in front of the anus. Its function is to provide a site for fluid reabsorption. It is lined by ciliated cuboidal epithelial cells that also contain microvilli. His first diagnosis was hydrocele of left testis, but aspiration cytology showed malignancy. Ultrastructural evidence for phagocytosis of spermatozoa in the.
Each of these lobes contains one to four, which converge on a tubular region at the testis hilus called the. Testis, rete testis hyperplasia nonneoplastic lesion atlas. In humans the testes occur as a pair of ovalshaped organs. Describe the blood testis barrier and the cell that forms. This portion of the testis is known as the mediastinum. Vasa efferentia from the rete testis open into the epididymis which is a highly coiled tubule. Histology of testis by dr mohammad manzoor mashwani. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Testis, plural testes, also called testicle, in animals, the organ that produces sperm, the male reproductive cell, and androgens, the male hormones. Manuals for preparation and performance of routine and special stains, and manuals for laboratory safety, are available in acrobat pdf format electron microscopy. Effects of estrogens on the testis of transsexuals. Mixed sertolileydig cell tumor and rete testis adenocarcinoma in rats treated with cdci, s. The cutup of orchiectomy specimens is dealt with in orchiectomy grossing.
Name the three layers of the uterine wall from the inside out. In peripheral area of the tumor, the remaining normal rete testis. Around the testis, the parietal peritoneum is named tunica vaginalis while the visceral peritoneum is named tunica albuginea. Size of testis in healthy european males, the average volume of each testicle is 18cm2. A set of electron micrographs demonstrates normal, benign, and malignant pathologic. 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. Such lesions require careful scrutiny including immunohistochemical analysis to exclude malignant lesions such as mesothelioma or papillary serous carcinoma. Histology of testis by dr mohammad manzoor mashwani 1. Primary adenocarcinoma of the rete testis is an extremely rare extratesticular neoplasm. The tumor was predominantly composed of irregular small tubules and papillary structures with cuboidal or polygonal cells. The objectives for examining microscopic slides as part of a course in basic histology include.
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