Histological examination of the hemorrhoids in 67 preparations of the rectum of adult persons showed the significance, in their development, of glomus and glomus blocking arteriovenous anorectal cavernous bodies, the two-three-fold increase of their volume was established. The dilatation of the glomus body lumen (from 20-30 to 270-480 microns) in the cavernous body wall is due to the epithelioid cell atrophy and sclerosis. When persistent dilatation and shortening of the distance between glomus mouths occurs, arterial blood passes from the peripheral branches of the superior rectal artery directly to the vena lumen, resulting, first, in the development of a simple compensatory and then varicose angioma-like flebectasia.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Septic cavernous sinus thrombosis complicated by occlusion of the internal carotid artery and multiple embolic strokes after surgery of an anorectal abscess: a clinical chameleon.
Neurologist
September 2012
Department of Neurology, University of Muenster, Muenster, Germany.
Background: Septic thrombosis of the cavernous sinus (CST) is a rare and potentially life-threatening condition mostly caused by facial or ear, nose, and throat infections. Anatomic structures in vicinity of the cavernous sinus are thereby susceptible to inflammatory damage. In particular nervous system structures are almost regularly affected; however, only few authors reported severe involvement of the internal carotid artery (ICA).
View Article and Find Full Text PDFAtypical tumors of the rectum with pathologic correlation.
Curr Probl Diagn Radiol
December 2011
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA.
Although the majority of rectal masses are histologically characterized as adenocarcinoma, there is a wide spectrum of rare, but specific, neoplastic processes that can involve the rectum and present with rectal bleeding. Knowledge of their existence and protean imaging features is crucial for accurate diagnosis and appropriate management. This review article describes the clinical, imaging, and histopathologic characteristics of several pathologically proven rectal lesions, including rectal carcinoid, rectal gastrointestinal stromal tumor, rectal cavernous hemangioma, primary anorectal melanoma, primary rectal lymphoma, and rectal metastases.
View Article and Find Full Text PDFA rare cause of recurrent gastrointestinal bleeding: mesenteric hemangioma.
World J Emerg Surg
January 2009
Ege University Medical Faculty Department of General Surgery, Organ Transplantation and Research Center, Izmir, Turkey.
Lower gastrointestinal hemorrhage accounts for approximately 20% of gastrointestinal hemorrhage. The most common causes of lower gastrointestinal hemorrhage in adults are diverticular disease, inflammatory bowel disease, benign anorectal diseases, intestinal neoplasias, coagulopathies and arterio-venous malformations. Hemangiomas of gastrointestinal tract are rare.
View Article and Find Full Text PDFMassive hemorrhage in pregnancy caused by a diffuse cavernous hemangioma of the rectum--EUS as imaging modality of choice.
Medscape J Med
February 2009
Endoscopic Ultrasound, Sacred Heart Medical Center, Spokane, Washington, USA.
Hemorrhoidal bleeding is common during pregnancy. Other preexisting anorectal conditions can also be exacerbated by the increased vascular volume and pelvic congestion. We present the case of a young woman who developed life-threatening rectal bleeding requiring early delivery.
View Article and Find Full Text PDFRectourethralis muscle and pitfalls of anterior perineal dissection in abdominoperineal resection and intersphincteric resection for rectal cancer.
Anat Sci Int
March 2007
Department of Surgery, Nara Medical University, Nara, Japan.
When performing nerve-sparing abdominoperitoneal resection or intersphincteric resection of lower rectal cancer, difficulty is sometimes encountered during dissection, separation and treatment in the area anterior to the anorectum passing through the levator hiatus between the bilateral levator ani slings owing to missing the surgical plane or venous bleeding. The rectourethralis muscle, which is a mass of smooth muscle, occupies the levator hiatus. The present histological study using nine male cadaveric specimens demonstrated that: (i) the external anal sphincter is likely to be tightly connected to the rectourethralis muscle; (ii) the rectal muscularis propria communicates with the rectourethralis muscle; (iii) the anorectal veins take a tortuous course across the rectourethralis muscle; (iv) Denonvilliers' fascia ends at the rectourethralis muscle; and (v) the rectourethralis muscle provides posterior attachment for the rhabdosphincter.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!