membranous urethra

WordNet

1. relating to or made of or similar to a membrane; "membranous lining"
2. characterized by formation of a membrane (or something resembling a membrane); "membranous gastritis" (同)membrane-forming
3. duct through which urine is discharged in most mammals and which serves as the male genital duct

PrepTutorEJDIC

1. 膜の;皮膜に似ている
2. 尿道

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/11/22 19:15:38」(JST)

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Membranous urethra
The male urethra laid open on its anterior (upper) surface. (Membranous part labeled at upper right.)
Dissection of the prostate showing the prostatic and membranous portions of the urethra (unlabeled)
Details
Latin	Pars intermedia urethrae masculinae, pars membranacea urethrae masculinae
Dorlands /Elsevier	p_07/12616970
Anatomical terminology

The membranous urethra or intermediate part of male urethra is the shortest, least dilatable, and, with the exception of the urinary meatus, the narrowest part of the urethra.

It extends downward and forward, with a slight anterior concavity, between the apex of the prostate and the bulb of the urethra, perforating the urogenital diaphragm about 2.5 cm below and behind the pubic symphysis.

The hinder part of the urethral bulb lies in apposition with the inferior fascia of the urogenital diaphragm, but its upper portion diverges somewhat from this fascia: the anterior wall of the membranous urethra is thus prolonged for a short distance in front of the urogenital diaphragm; it measures about 2 cm in length, while the posterior wall which is between the two fasciæ of the diaphragm is only 1.25 cm long. The anatomical variation in membranous urethral length measurements in men have been reported to range from 0.5 cm to 34.3 cm.

The membranous portion of the urethra is completely surrounded by the fibers of the Sphincter urethrae membranaceae.

In front of it the deep dorsal vein of the penis enters the pelvis between the transverse ligament of the pelvis and the arcuate pubic ligament; on either side near its termination are the bulbourethral glands.

Additional images

• Structure of the penis

• Vertical section of bladder, penis, and urethra.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

• Anatomy photo:43:08-0102 at the SUNY Downstate Medical Center - "The Female Pelvis: The Urethra"
• Anatomy photo:44:06-0103 at the SUNY Downstate Medical Center - "The Male Pelvis: The Urethra"
• MedEd at Loyola Grossanatomy/dissector/practical/pelvis/pelvis11.html

UpToDate Contents

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• 1. Clinical features and therapy of lupus membranous nephropathy
• 2. 膜性腎症の原因および診断 causes and diagnosis of membranous nephropathy
• 3. 男性における尿道狭窄疾患の治療 treatment of urethral stricture disease in men
• 4. Membranous nephropathy and renal transplantation
• 5. 後部尿道弁の臨床症状および診断 clinical presentation and diagnosis of posterior urethral valves

English Journal

• Treatment for long bulbar urethral strictures with membranous involvement using urethroplasty with oral mucosa graft.

• Gimbernat H1, Arance I1, Redondo C1, Meilán E1, Andrés G1, Angulo JC2.
• Actas urologicas espanolas.Actas Urol Esp.2014 Jun 16. pii: S0210-4806(14)00139-9. doi: 10.1016/j.acuro.2014.04.001. [Epub ahead of print]
• INTRODUCTION: Urethroplasty with oral mucosa grafting is the most popular technique for treating nontraumatic bulbar urethral strictures; however, cases involving the membranous portion are usually treated using progressive perineal anastomotic urethroplasty. We assessed the feasibility of performin
• PMID 24948356

• Pelvic floor musculature and bladder neck changes before and after continence recovery after radical prostatectomy in pelvic MRI.

• Sohn DW1, Hong CK, Chung DJ, Kim SH, Kim SJ, Chung J, Joung JY, Lee KH, Seo HK.
• Journal of magnetic resonance imaging : JMRI.J Magn Reson Imaging.2014 Jun;39(6):1431-5. doi: 10.1002/jmri.24299. Epub 2013 Sep 10.
• PURPOSE: To evaluate the changes in pelvic floor anatomy using MRI before and after continence recovery after radical prostatectomy (RP).MATERIALS AND METHODS: Thirteen men with prostate cancer who underwent RP (mean age, 67.4 ± 8.8 years) volunteered for this study. Prostate MRIs were performed du
• PMID 24023035

Japanese Journal

• HPV16型を検出した尿道原発コンジローマ様癌の1例

• 浦 慎太郎,高野 徳昭,原武 譲二
• 日本泌尿器科學會雑誌 105(2), 47-50, 2014
• 免疫抑制剤の長期投与を行っている腎移植後の男性患者において，HPV16型を検出して診断した極めて稀な尿道原発コンジローマ様癌の1例を報告する．外尿道口より約1 cm膀胱側から膜様部尿道のやや手前まで広範囲に渡って乳頭状腫瘍が充満していた．組織学的には，腫瘍は著明な乳頭状を呈して増殖し，表層部を主体とするkoilocytotic atypiaが目立っていた．また尿道海綿体と静脈内の一部に浸潤像を認め …
• NAID 130005076058

• 尿道狭窄症に対する経尿道的内尿道切開術の有効性の検討

• 磯野 誠,堀口 明男,田崎 新資 [他],黒田 健司,佐藤 全伯,朝隈 純一,瀬口 健至,伊藤 敬一,早川 正道,淺野 友彦
• 日本泌尿器科學會雜誌 103(6), 691-696, 2012-11-20
• (目的) 尿道狭窄症に対する内尿道切開術の有効性について検討した． (対象と方法) 当院で内尿道切開を行った尿道狭窄症19例を対象とした．狭窄部位は球部尿道17例，膜様部尿道1例，振子部尿道1例であった．狭窄長は1 cm未満13例，1～2 cmが2例，2 cm以上が4例で，狭窄原因は騎乗型損傷7例，経尿道的手術後7例，骨盤骨折1例，不明4例であった．全例とも手術はガイドワイヤーを併用した，cold …
• NAID 10031126330

Related Pictures

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★リンクテーブル★

リンク元	「膜様部尿道」
関連記事	「membranous」

「膜様部尿道」

　　[★]

英

membranous urethra

同

隔膜部尿道

関

後部尿道(膜様部尿道+前立腺部尿道) -> 前部尿道

「membranous」

　　[★]

• adj.

• 膜状の、膜性の