The pectinate line

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Webb22 sep. 2024 · Anal cancer is a relatively rare cancer of the gastrointestinal tract, accounting for around 4% of colorectal cancers and has a UK incidence of approximately 1 in 100,000. The majority of anal cancers are squamous cell carcinomas, arising from below the dentate line (Fig. 1). The remainder (~10%) are adenocarcinomas arise from the … WebbThe pectineal line of the pubis (also pecten pubis) is a ridge on the superior ramus of the pubic bone. It forms part of the pelvic brim . Lying across from the pectineal line are fibers of the pectineal ligament, and the …

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Webb2 aug. 2024 · The inferior rectal nerve, also known as the inferior anal nerve or inferior hemorrhoidal nerve, is a branch of the pudendal nerve which is derived from S2, S3 and S4 nerve roots of the sacral plexus.The nerve provides sensory innervation to the anal canal inferior to the pectinate line and motor innervation to the external anal sphincter. Webb8 aug. 2024 · The inguinal lymph node can be subdivided into the superficial and deep lymph nodes and collectively drains the anal canal(below the pectinate line), the skin below ... pork wholesale cuts

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WebbWe indicate anterior and posterior. We show the anal columns, which are folds of tissue raised by the underlying vasculature. Inferiorly at the end of the columns, we see the pectinate line, which is a mucocutaneous line marking the demarcation between lining derived from endoderm superiorly and ectoderm inferiorly. WebbThe anal canal begins at the anal verge and ends at the anorectal junction (pectinate line, mucocutaneous junction, dentate line), where there are 8 to 12 anal crypts and 5 to 8 papillae. The canal is lined with anoderm, a continuation of the external skin. The anal canal and adjacent skin are innervated by somatic sensory nerves and are highly … Webb3 juni 2024 · Ano-Rectal anatomy: Above and below pectinate line Here's an illustration I made :) It shows the embryology, pathology, innervation, blood supply, venous drainage and lymphatic drainage on the rectum above and below pectinate line. That's all! A modified version of this will be in the First Aid book! :) -IkaN Posted by IkaN (Nakeya Dewaswala, … pork white meat

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The pectinate line

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Webb1 INTRODUCTION. The study of anatomy relies upon the ability to investigate three-dimensional (3D) spatial relationships between structures (Miller, 2000).Many authors have advocated that the best approach to learning anatomy is to use dissected cadaveric specimens within a dedicated ‘wet’ laboratory facility (Aziz et al., 2002; Kerby et al., 2011; … Webb25 juli 2024 · The pectinate line is an important anatomic landmark, as it is where the blood supply, lymphatics, and nerves differ based on being above or below the pectinate line. Above the pectinate line, the superior …

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WebbUpper region (frequently named pecten): It’s 15 millimeters long and stretches from the pectinate line to Hilton’s line. It’s lined by the non-keratinized stratified squamous epithelium. The mucous lining in this region appears bluish in colour because of underlying dense venous plexus and is adherent to the underlying structures. Webb23 juli 2016 · The anal valves collectively form an irregular circle – known as the pectinate line (or dentate line). This line divides the anal canal into upper and lower parts, which …

WebbFinally, the hindgut extends from the distal third of the transverse colon to the anal canal, above the pectinate line. It consists of the distal portion of the transverse colon, descending colon and sigmoid colon and rectum. Now, remember that organs with the same embryologic origin share the same arterial supply, ... WebbThe opening of the pit is lined with epithelial cells that secret a thick basic mucous that aids in the protection of the gastric mucosa (lining) found throughout the stomach. If we were to look deeper into the pit, we would see that the pit actually turns into the gastric gland. Within the gland, we see specialized epithelial cells.

http://endotoday.com/endotoday/anus.html Webb27 dec. 2016 · Anus and Perianal Area. Whenever the anatomy of the anal canal is discussed, one visible landmark, namely the dentate or pectinate line, is mentioned as important. This line is located at the distal end of the anal columns where the anal valves are situated. It has also been called the mucocutaneous line, although it is separated …

WebbThe pectinate line is an important anatomic landmark, as it is where the blood supply, lymphatics, and nerves differ based on being above or below the pectinate line. Can you feel the pectinate line? Internal hemorrhoids are the hemorrhoids in the anal canal above the pectinate line, also known as the pain line because below this area you feel pain.

Webb2 aug. 2024 · Histological images. (a) Histological image of the vicinity of the pectinate line of the anal canal showing the invasion of adenocarcinoma with tube formation directly under the stratified squamous epithelium. It was mucinous. Pagetoid cells, which are large clear cells, diffused into the stratified squamous epithelium. sharp longWebb26 juli 2024 · The pectinate line (or dentate line) is a horizontal, jagged band that runs circumferentially just below the level of the anal sinuses, and represents the junction between the hindgut and external skin. The mucosa above this line is fairly insensitive, whereas the area below is very sensitive. sharp lower back pain pregnancyWebb2 dec. 2024 · The pectineus muscle is a hip adductor, one of a group of five large muscles on the medial (middle) thigh that adduct the leg. The other hip adductors include the … sharp lr38603a cameraWebbpec·ti·nate line [TA] the line between the simple columnar epithelium of the rectum and the stratified epithelium of the anal canal, usually defined as being at the level of the anal … sharp locations californiaWebbThe pectinate line is an important anatomic landmark, as it is where the blood supply, lymphatics, and nerves differ based on being above or below the pectinate line. Can you … sharp lower pelvic pain in womenWebbAm Fam Physician. 2001;64 (1):77-89. A more recent article on benign anorectal conditions is available. This is Part II of a two-part article on anorectal conditions. Part I, “Symptoms and ... pork whiskey sauceWebbIf the venous drainage of the anal canal above the pectinate line is impaired in a patient with portal hypertension, there may be an increase in blood flow downward to the systemic venous system via anastomoses with the inferior rectal vein, which is a tributary of the: External iliac Inferior gluteal Inferior mesenteric Internal iliac sharp lower ab pain