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Related Concept Videos

Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

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Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
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Muscles of the Pelvic Floor and Perineum01:26

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The muscles of the pelvic floor and perineum are crucial for supporting the pelvic organs, controlling continence, and aiding in sexual function, childbirth, and core stability. They are typically divided into the superficial perineal layer and the deep pelvic floor layer.
Perineal Layer
The perineum is a diamond-shaped area below the pelvic diaphragm, divided into an anterior urogenital triangle that contains the external genitals and a posterior anal triangle housing the anus. The urogenital...
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Large Intestine01:09

Large Intestine

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The large intestine is divided into three main regions: the cecum, colon, and rectum. Extending from the ileocecal valve to the anus, it frames the small intestine on three sides.
The ileocecal sphincter, a mucous membrane fold, guards the opening from the ileum to the large intestine. This valve permits material from the small intestine to pass into the large intestine. Attached to the ileocecal valve is the cecum. This small pouch, approximately 6 cm long, has a twisted, coiled tube known as...
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Spinal Nerves: Plexus II01:21

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The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
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Abdominal Regions and Quadrants01:19

Abdominal Regions and Quadrants

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To promote clear communication, for instance, about the location of a patient's abdominal pain or a suspicious mass, anatomists and clinicians typically use imaginary lines to categorize the abdominopelvic cavity into either four quadrants or nine regions to identify organs in the cavity.
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Veins of the Abdomen and Pelvis01:18

Veins of the Abdomen and Pelvis

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The human body is a complex system of interconnected parts, and the circulatory system plays a crucial role in maintaining overall health. One key component of this system is the inferior vena cava, a large vein responsible for returning blood from the abdominopelvic viscera and abdominal walls to the heart.
The inferior vena cava is fed by numerous smaller veins. The lumbar veins, for instance, drain the posterior abdominal wall, emptying both directly into the inferior vena cava and into the...
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Related Experiment Video

Updated: Jan 19, 2026

Transvaginal Mesh Insertion in the Ovine Model
10:32

Transvaginal Mesh Insertion in the Ovine Model

Published on: July 27, 2017

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Umbilical pilonidal sinus

S B Schoelch1, T L Barrett

  • 1Department of Dermatology, Naval Medical Center, San Diego, California 92134-5000, USA.

Cutis
|August 26, 1998
PubMed
Summary
This summary is machine-generated.

Umbilical pilonidal sinus, though rare, requires aggressive treatment due to potential peritoneal spread. It should be considered in the diagnosis of umbilical nodules.

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Area of Science:

  • General Surgery
  • Dermatology

Background:

  • Pilonidal sinus commonly affects the sacrococcygeal area.
  • Umbilical pilonidal sinus is an uncommon presentation.

Observation:

  • Umbilical pilonidal sinus carries a risk of peritoneal extension of inflammation.
  • This necessitates a more aggressive treatment approach compared to sacrococcygeal cases.

Findings:

  • Umbilical pilonidal sinus is a distinct clinical entity requiring specific diagnostic consideration.
  • Early and aggressive management is crucial to prevent complications.

Implications:

  • Pilonidal sinus should be included in the differential diagnosis for umbilical nodules.
  • Awareness of this condition can lead to timely and appropriate interventions.