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Topic: Testis

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MSN Encarta - Search View - Testis In man the sex hormone produced by the testis is testosterone, which controls the growth of the male reproductive system and stimulates the development of the male secondary sexual characteristics, such as the growth of the beard, the deepening of the voice, and the male contours of the body. Undescended testis is sometimes caused by dysfunctional hormones that control the development of the spermatic cord, which is comprised of the vas deferens and supporting nerves and blood vessels. Sperm travels from the testis through the epididymis to the vas deferens, which carries the sperm to the urethra. encarta.msn.com /text_761587454__1/Testis.html   (691 words)

Hydrocele testis - Wikipedia, the free encyclopedia A hydrocele testis is an accumulation of clear fluid in the tunica vaginalis, the most internal of membranes containing a testicle. A primary hydrocele causes a painless enlargement in the scrotum on the affected side and is thought to be due to the defective absorbption of fluid secreted between the two layers of the tunica vaginalis (investing membrane). A secondary hydrocele is secondary to either inflammation or a neoplasm in the testis. en.wikipedia.org /wiki/Hydrocele_testis   (242 words)

testis on Encyclopedia.com Cystic dysplasia of the testis with terminal ureterectasis and renal absence: evidence of involution of a dysplastic kidney? A testis is composed of about 800 coiled seminiferous tubules whose linings contain cells that develop into sperm. Let them play: Renal, testis injuries are rare, minor : Solitary testis or kidney should not preclude team sport participation, study suggests. www.encyclopedia.com /html/t1/testis.asp   (649 words)

Undescended Testis, Cincinnati Children's Hospital Medical Center The testis is freed from the structures preventing its descent, and the blood supply to the testis and the vas deferens (the tube that carries sperm from the testis to the prostate) is preserved. Thus, when a testis cannot be felt within the scrotum or in the groin, an ultrasound exam is sometimes obtained to determine whether it is present. The undescended testis may be located in the inguinal canal, within the abdominal cavity, or in an ectopic (unusual) location, but it is most commonly found within the inguinal canal (80%). www.cincinnatichildrens.org /health/info/urinary/diagnose/undescended-testis.htm   (918 words)

From the Archives of the AFIP: Tumors and Tumorlike Lesions of the Testis: Radiologic-Pathologic Correlation -- Woodward et al. 22 (1): 189 -- RadioGraphics unilateral, and clustered in the periphery of the testis (Fig 20) the tumor is confined to the testis, epididymis, or spermatic Tumors and Tumorlike Lesions of the Testis: Radiologic-Pathologic Correlation radiographics.rsnajnls.org /cgi/content/full/22/1/189   (6309 words)

Testis Cancer - Evaluation Testis cancer is suspected with the finding of any mass involving the body of the testicle, although, GCTs are found outside of the testis in about 10% of cases. Tissue is obtained by surgical removal of the involved testis (inguinal orchidectomy) through a groin incision using an approach similar to performing a hernia repair. A scrotal ultrasound is a safe and non-invasive test often used to determine the anatomic relationship between the mass and the testis as well as to identify components of fluid and blood flow. urologychannel.com /cornell/testis/evaluation   (502 words)

Cryptorchidism Incidence: Because the testis descends into the scrotum during the last month of pregnancy, many premature boys are delivered before the descent process is completed. At tunnel is made into the scrotum and the testis is brought through the tunnel and anchored in the scrotum. Try to entrap the testis between the hand moving along the inguinal canal and a finger placed on the scrotum. www.meddean.luc.edu /lumen/MedEd/urology/fltstdes.htm   (242 words)

ABSENT TESTIS IN SCROTUM - Pediatric Oncall If the testis is palpable in the inguinal region, it can be easily brought down in one operation, but those, which are not felt and are in the abdomen, may need one or two operations to be fixed in the scrotum. If the testis can be felt, no other investigations are required; however, if the testis is not palpable, then, it may be inside the abdomen, deep in the inguinal region, or rarely, it may be absent on that side. This testis may be felt in the groin or inguinal region, or it may not be felt at all. www.pediatriconcall.com /forpatients/CommonChild/absenttestis_scrotum.asp   (686 words)

Testis Cancer: Germ Cell Tumors Testis tumors are rare in the black population regardless of which geographic black population is studied, i.e. Epididymitis and epididymo-orchitis (inflammation of the attachment to the testis and testis) are the most frequently mistaken diagnosis for testis cancer. Testis tumors make up approximately two percent of all malignant cancers in men and account for up to ten percent of all malignant disease occurring within the male genitourinary system. www.urologyinstitute.com /html/testis_cancer__germ_cell_tumor.html   (2153 words)

Medindia.net - Paediatrics urology - Undescended During this operation, the testis is found at the lower part of the belly and fixed to the testis after achieving enough length. When the baby is formed in the womb, the testis is initially formed inside the baby’s belly.As the fetus (baby in the womb) grows, the testes gradually descend out of the body and reach the sac (scrotum). When the testis does not come down by it self by 6 months, it is essential to consult a Paediatric Urologist with a view to correct. www.medindia.net /patients/paediatrics/Undescended.asp   (861 words)

Ischemia-Reperfusion of the Murine Testis Stimulates the Expression of Proinflammatory Cytokines and Activation of c-jun N-Terminal Kinase in a Pathway to E-Selectin Expression -- Lysiak et al. 69 (1): 202 -- Biology of Reproduction incision was reopened, the testis was counterrotated to the and the testis was freed from the epididymo-testicular membrane. Ischemia-Reperfusion of the Murine Testis Stimulates the Expression of Proinflammatory Cytokines and Activation of c-jun N-Terminal Kinase in a Pathway to E-Selectin Expression -- Lysiak et al. www.biolreprod.org /cgi/content/full/69/1/202   (4625 words)

Testis Agenesis A testis that does not descend into the patent processus vaginalis in the inguinal canal may not be palpable. Diagnosis: When the testis fails to develop, of course, it cannot be palpated on examination. Later failure may result in absence of the testis with presence of a vas. www.meddean.luc.edu /lumen/Meded/urology/fltestdv.htm   (203 words)

torsion of the testis If the testis is explored within 6 hours of torsion, the salvage rate for the testis is up to 90%. The abnormal testis is removed, and the other side often explored to make sure the remaining testis will not twist. It can be confused with torsion of the appendix of the testis, or epididymitis in the child over 13 or so. drhull.com /EncyMaster/T/torsion_testis.html   (251 words)

testis --  Encyclopædia Britannica In humans the testis is either of the paired, oval-shaped organs that produce sperm and the male hormones, the androgens. The enzymes have been found in insects, leeches, snake venom, mammalian tissues (testis being the richest mammalian source), and in bacteria. Includes links to several prominent testis research/treatment facilities and to a glossary for medical terms. www.britannica.com /eb/article-9071830?tocId=9071830   (481 words)

NEL, Hypoxia alters testis development in neonatal rats Testosterone (T) in the plasma and the testis was measured in rats at PND 3, 7, 14, 21, 28, 35 and 45 respectively. The current study was designed to investigate the effects of hypoxia on development of the rat testis from the neonatal to reproductively mature ages. : To investigate the effects of continued hypoxia on postnatal development of the rat testis. www.nel.edu /23_3/NEL230302A05_Du.htm   (330 words)

Multiple Effects of Retinoids on the Development of Sertoli, Germ, and Leydig Cells of Fetal and Neonatal Rat Testis in Culture -- Livera et al. 62 (5): 1303 -- Biology of Reproduction on the onset of steroidogenesis in the 14.5-dpc fetal testis. The organization of the cords was completed in the testis cultured in control medium, whereas it had regressed in the testis cultured with RA. One testis from each fetus was cultured in the control medium and the other in medium with various concentrations of RA (A) or RE (B). www.biolreprod.org /cgi/content/full/62/5/1303   (7263 words)

Ultrasonography Is Unnecessary in Evaluating Boys With a Nonpalpable Testis -- Elder 110 (4): 748 -- Pediatrics identified the testis in the inguinal canal or scrotum in all The testis was identified by sonography in 12 (18%) of 66 cases, testis in 12 (18%) of 66 cases, and all were identified as being pediatrics.aappublications.org /cgi/content/full/110/4/748   (2217 words)

Male Genital Pathology Identify the body of the testis, epididymis, and spermatic cord. Note the presence of two vestigial structures, the appendix testis and the appendix epididymis. Here is a normal testis and adjacent structures. www-medlib.med.utah.edu /WebPath/MALEHTML/MALE130.html   (32 words)

Testis definition - Medical Dictionary definitions of popular medical terms Testis: The testis (or testicle) is the male sex gland. The word "testis" is a Latin word that means "witness." In ancient times, a person providing testimony might validate it by holding the scrotum, his or another man's. Testis definition - Medical Dictionary definitions of popular medical terms www.medterms.com /script/main/art.asp?articlekey=8975   (272 words)

Testis and Scrotum We have observed microlithiasis of the epididymis and the rete testis in surgical (8 epididymis and 6 testis) and autopsy specimens (12 cases). Mucinous tumors of the testis and paratestis resemble their ovarian counterparts, exhibiting the same morphologic spectrum, from benign to borderline to malignant, and having both endocervical-like and intestinal features. In infants and young adults, microlithiasis of the epididymis and the rete testis is frequently associated with alterations in the development of the proximal spermatic way. www.thedoctorsdoctor.com /bodysites/testis_scrotum.htm   (4392 words)

testis. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. The resemblance between testimony, testify, testis, and testicle shows an etymological relationship, but linguists are not agreed on precisely how English testis came to have its current meaning. The Latin testis originally meant “witness,” and etymologically means “third (person) standing by”: the te– part comes from an older tri–, a combining form of the word for “three,” and –stis is a noun derived from the Indo-European root st Another theory says that the sense of testicle in Latin testis is due to a calque, or loan translation, from Greek. www.bartleby.com /61/73/T0127300.html   (304 words)

ABC of General Paediatric Surgery: INGUINAL HERNIA, HYDROCELE, AND THE UNDESCENDED TESTIS -- Davenport 312 (7030): 564 -- BMJ to be induced by temperature, that an undescended testis undergoes testis is missing, it is small (dysplastic), or it is lying the testis through the layers of the body wall towards the scrotum. bmj.bmjjournals.com /cgi/content/full/312/7030/564   (1460 words)

Testis Chance of survival of patients with testis cancer is excellent. For all practical purposes, testis cancers can be grouped in three categories, depending on the mass and the amount of cancer: Testis cancer can travel to distant sites such as local www.tirgan.com /testis.htm   (551 words)

1. Predisposing Factors/Prevention : BC Cancer Agency Cancer of the testis is relatively uncommon in B.C., but the incidence rate has been increasing for at least 2 decades at about 1-2% per year. Carcinoma in situ of contralateral testis in patients with testicular germ cell cancer: study of 27 cases in 500 patients. First degree relatives of a testis cancer patient have a 3-10 fold increase in risk for developing a testis cancer. www.bccancer.bc.ca /HPI/CancerManagementGuidelines/Genitourinary/Testis   (309 words)

Pdgfr-alpha mediates testis cord organization and fetal Leydig cell development in the XY gonad -- Brennan et al. 17 (6): 800 -- Genes and Development and in the partitioning of interstitial and testis cord compartments. Merchant-Larios, H., Moreno-Mendoza, N., and Buehr, M. The role of the mesonephros in cell differentiation and morphogenesis of the mouse fetal testis. XY samples, subdivision of testis cord and interstitial compartments had not occurred and the coelomic vessel (arrowhead) had formed few distinct branches between cords (arrows). www.genesdev.org /cgi/content/full/17/6/800   (6288 words)

Role of Neurotropins in Rat Embryonic Testis Morphogenesis (Cord Formation) -- Levine et al. 62 (1): 132 -- Biology of Reproduction The appearance of p75/LNGFR in the testis correlated with the Merchant-Larios H, Moreno-Mendoza N, Buehr M. The role of the mesonephros in cell differentiation and morphogenesis of the mouse fetal testis. testis and are required for cord formation [22]. www.biolreprod.org /cgi/content/full/62/1/132   (6295 words)

Expression of Testis Angiotensin-Converting Enzyme Is Mediated by a Cyclic AMP Responsive Element Testis angiotensin-converting enzyme (testis ACE), an ACE isozyme that plays an important role in male fertility, is transcribed from a unique promoter active only in developing spermatids. In vitro analysis suggests the importance of a cyclic AMP response element (CRE)-like region within the testis ACE promoter, and similar DNA motifs are important in the expression of a variety of testis-specific genes. These experiments prove that the CRE-like element is essential for testis ACE promoter activity, although it does not appear to be responsible for its tissue specificity. info.med.yale.edu /labinvest/abstracts/97months/9711nov/1197.013.html   (245 words)

Cell Junction Dynamics in the Testis: Sertoli-Germ Cell Interactions and Male Contraceptive Development -- Cheng and Mruk 82 (4): 825 -- Physiological Reviews In the testis, the basement membrane is adjacent In mammals, the functional unit of the testis is the seminiferous tubule. Figure 5 depicts a hypothetical pathway by which Sertoli cell TJ dynamics are regulated in the rat testis. physrev.physiology.org /cgi/content/full/82/4/825   (10214 words)

eSynopsis of Infarct of the Testis •The condition is unilateral; the affected testis may be elevated in the scrotal sac. •There may be predisposing conditions such as incomplete descent of the testis or abscence of the gubernaculum testis. •Extensive testicular hemorrhage is usually due to torsion of the testis. pathweb.uchc.edu /esynopsis/S308.htm   (146 words)

The Mosby Medical Encyclopedia: testis@ HighBeam Research The ducts in which the sperm is stored (epididymic) are located on the back of the testis. Each testis is an oval body about 4 cm long, 2.5 cm wide. /tes'tis/, pl. testes, one of the pair of male gonads that produce semen. www.highbeam.com /library/doc0.asp?DOCID=1P1:28741155   (175 words)

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