It surrounds the anal canal. Composed of skeletal muscle and classically categorized into deep, superficial, and subcutaneous parts:. Anatomy: Abdominopelvic. Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Updating… Please wait.

Objectives: To evaluate the structure and function of the internal IAS and external EAS anal sphincters in anoreceptive homosexual men and to determine whether anoreceptive intercourse ARI is associated with a higher risk of incontinence in this population. Methods: We studied 14 anoreceptive homosexual males and 10 age-matched non-anoreceptive heterosexual males in a controlled, prospective cohort study. Subjects underwent evaluation of resting and maximum squeeze anal canal pressures maximum squeeze pressure obtained over resting pressure by station pull-through technique, using a manometric perfusion catheter followed by endoanal ultrasonography to evaluate the structure of the IAS and EAS. Manometry also was performed in age-matched male controls.

Grassi 74, Milan, Italy. Squamocellular anal carcinoma is increasingly diagnosed in patients with risk factors. State-of-the-art imaging with magnetic resonance imaging MRI using phased-array coils and volumetric multidetector computed tomography CT provides detailed visualisation of anal disorders, identification and extent assessment of neoplastic tissue, detection and characterisation of nodal and visceral metastases.