seal limbs

Học thuật
Thân thiện
Definition

Noun: A congenital malformation where the proximal segments (upper arm or thigh) of a limb are absent or severely underdeveloped, resulting in the hand or foot being attached directly to the torso, resembling the flipper of a seal. This rare condition is historically associated with in utero exposure to the drug thalidomide.

Usage

The term is used specifically in medical and teratological contexts to describe a severe type of limb reduction defect. * The autopsy report noted the presence of seal limbs, confirming the suspected thalidomide syndrome. * Research into the mechanisms of thalidomide aims to understand how it causes developmental abnormalities like seal limbs.

Advanced Usage
  • The term is often used in a historical context when discussing the thalidomide tragedy of the late 1950s and early 1960s.
    • The documentary highlighted the devastating effects of the drug, which included causing seal limbs in thousands of infants worldwide.
Variants and Related Words
  • Phocomelia (n): The formal medical term for this condition. "Seal limbs" is a descriptive lay term for a severe form of phocomelia.
    • The diagnosis was severe phocomelia, affecting all four limbs.
  • Limb reduction defect (n): A broader category of congenital abnormalities that includes phocomelia/seal limbs.
  • Thalidomide embryopathy (n): The spectrum of birth defects caused by thalidomide exposure, which often includes phocomelia.
Synonyms
  • Phocomelia (n): The direct medical synonym.
  • Flipper limbs (n): A similar descriptive term, though less common than "seal limbs."
Notes on Meaning
  • The term is highly specific and graphic, deriving from the visual resemblance of the affected limb to a seal's flipper. It is primarily a descriptive term rather than a formal clinical diagnosis, which would be "phocomelia."
  • Due to its association with a major pharmaceutical disaster, its use is almost exclusively linked to discussions of teratogens (substances that cause birth defects) and medical history.
Noun
  1. an abnormality of development in which the upper part of an arm or leg is missing so the hands or feet are attached to the body like stumps; rare condition that results from taking thalidomide during pregnancy

Từ đồng nghĩa