Anal sinuses

Anal sinuses are small depressions or cavities that are located in the anal canal. They are also known as anal crypts or crypts of Morgagni, named after the Italian anatomist Giovanni Battista Morgagni who first described them.

Etymology

The term "sinus" comes from the Latin word "sinus", which means "bend" or "curve". The term "anal" is derived from the Latin word "anus", which means "ring" or "circle". The term "crypt" comes from the Greek word "kryptos", which means "hidden". The term "Morgagni" is derived from the surname of the Italian anatomist Giovanni Battista Morgagni.

Anatomy

Anal sinuses are located in the upper half of the anal canal, above the pectinate line. They are small, tubular, and extend upwards and inwards from the surface of the anal canal. They are lined with columnar epithelium and are surrounded by anal glands which secrete mucus into the sinuses. This mucus helps to lubricate the anal canal and facilitate the passage of feces.

Clinical significance

Anal sinuses and the associated anal glands can become infected or blocked, leading to conditions such as anal abscess or anal fistula. These conditions can cause symptoms such as pain, swelling, and discharge from the anus, and may require surgical treatment.

Related terms

• Anal canal
• Anal glands
• Anal abscess
• Anal fistula
• Pectinate line
• Giovanni Battista Morgagni

See also

• Anus
• Rectum
• Digestive system

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