Ebook Direct diagnosisin radiology urogenital imaging: Part 2
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Ebook Direct diagnosisin radiology urogenital imaging: Part 2
3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • The Ebook Direct diagnosisin radiology urogenital imaging: Part 2 straight terminal portions of the seminiferous tubules join to form the rete testis, enter the mediastinum testis, and become the efferent ductules • The ductules pierce through the tunica albuginea to form the head of epididymis and then converge into the larger vas deferens in the body and tail • Ebook Direct diagnosisin radiology urogenital imaging: Part 2 The seminiferous tubules are composed of germ cells and Sertoli cells • Testoster-one-producing Leydig cells are in the testicular interstitium • TunEbook Direct diagnosisin radiology urogenital imaging: Part 2
ica albuginea: this is a dense fibrous capsule with an overlying mesothelial layer, enclosing the testis.Imaging Signs►Modality of choiceUltrasound • 3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • The Ebook Direct diagnosisin radiology urogenital imaging: Part 2e granular echotexture • Infant testis: 1.5 X 1 cm in size and of lower echogenicity • Small amount of serous fluid should not be misinterpreted as hydrocele.Tunica albuginea: Thin echogenic line surrounding the testis • Best seen where it reflects into the testis as the mediastinum testis.Mediastin Ebook Direct diagnosisin radiology urogenital imaging: Part 2um testis: Echogenic • Located eccentrically • Tubules coursing in a caudocranial direction.Scrotal cavity: Thin anechoic rim representing fluid is ofEbook Direct diagnosisin radiology urogenital imaging: Part 2
ten seen, especially in the area adjacent to the head of epididymis.Epididymis: Isoechoic or hypoechoic and somewhat coarser than the testis • Pyramid3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • The Ebook Direct diagnosisin radiology urogenital imaging: Part 25 mm. Epididymal appendix: Pedunculated hydatid attached to the epididymal head.Testicular appendix (hydatid of Morgagni): Ovoid hydatid. 5 mm in size, between the upper pole of the testis and the epididymis • Isoechoic • Cystic • Typically seen only when a hydrocele is present or in case of torsion Ebook Direct diagnosisin radiology urogenital imaging: Part 2.Testicular artery: Primary vascular supply to the testis • Branch of the abdominal aorta • Pierces the tunica albuginea at the mediastinum, forming cEbook Direct diagnosisin radiology urogenital imaging: Part 2
apsular arteries • Capsulararteriesgive off centripetal branches • An occasional variant runs directly within the mediastinum as a transmediastinal ar3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • The Ebook Direct diagnosisin radiology urogenital imaging: Part 2ly the epididymis, vas deferens, and peritesticular tissue • Rl 0.63-1.0.Pampiniform plexus: Venous drainage • Part of the spermatic cord • Opens into the ipsilateral testicular vein.Scrotal AnatomyFig. 3.1 Normal upper pole of the testis. Longitudinal ultrasound scan. Higher echogenicity of the tes Ebook Direct diagnosisin radiology urogenital imaging: Part 2tis in the polar region compared with the adjacent pyramidal head of the epididymis (filled arrow). A small amount of fluid in the scrotum (open arrowEbook Direct diagnosisin radiology urogenital imaging: Part 2
) is normal.The Male GenitalsFig. 3.2 Doppler ultrasound of the testis. Normal biphasic arterial flow pattern.3Scrotal AnatomyThe Male GenitalsFig. 3.3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • The Ebook Direct diagnosisin radiology urogenital imaging: Part 2rast administration. Testis with intermediate signal intensity. Normal tail of epididymis (arrow).► MRI findingsTestis: Homogeneous intermediate signal intensity on T1-weighted images • High signal intensity on T2-weighted images • Hypointense septa radially extending from the capsule to the mediast Ebook Direct diagnosisin radiology urogenital imaging: Part 2inum testis • Tunica albuginea: Thin line of low signal intensity.Epididymis: Isointense to testis on T1-weighted images, hypointense on T2-weighted iEbook Direct diagnosisin radiology urogenital imaging: Part 2
mages • More marked contrast enhancement compared with the testis.Differential DiagnosisCryptorchidism- Undescended testis, seen in 3% of newborns, ma3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • The Ebook Direct diagnosisin radiology urogenital imaging: Part 2will atrophy and has a higher risk of testicular tumor3 I Scrotal AnatomyThe Male GenitalsDefinition►AnatomyEach testis consists of lobules containing densely packed convoluted seminiferous tubules • TheGọi ngay
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