Definition

Noun: 1. A congenital or pathological condition characterized by the absence or abnormal closure of a natural passage, tube, or opening in the body. This is a medical term describing the failure of a bodily orifice or tubular organ to develop properly, resulting in it being closed or missing.

Usage

The word "atresia" is used exclusively as a medical term to describe a specific type of anatomical defect. It is almost always preceded by the name of the affected structure. * It is a countable noun (e.g., an atresia, several atresias). * It is commonly found in formal medical writing, diagnosis, and clinical discussion.

Examples

• The newborn was diagnosed with esophageal atresia, requiring immediate surgery.
• Biliary atresia is a serious liver condition affecting infants.
• The surgeon successfully repaired the anal atresia.
• A common cause of infertility in women can be follicular atresia within the ovaries.

Advanced Usage

• Pathological vs. Physiological Atresia: While typically congenital (present at birth), "atresia" can also describe a normal physiological process, such as the degeneration of ovarian follicles (follicular atresia), which is a part of the regular menstrual cycle.
• The condition is often described in terms of its location and can be classified (e.g., ).

Variants and Related Words

• Atretic (adjective): Pertaining to or affected by atresia.
  • The atretic segment of the intestine was removed.

Synonyms

• Imperforation: Specifically refers to the absence of a normal opening.
• Occlusion: A broader term for blockage or closure, which can be acquired (not necessarily congenital like atresia).
• Stenosis: A narrowing of a passage, which is different from a complete closure (atresia).

Antonyms

• Patency: The state of being open, unobstructed, and functioning normally.
• Permeability: The quality of allowing liquids or gases to pass through.

Noun

1. an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent