phocomelia
Noun: A severe congenital abnormality characterized by the absence or extreme underdevelopment of the proximal (upper) segments of a limb or limbs. This results in the hands or feet appearing to be attached directly to the torso, resembling the flippers of a seal. This rare condition is a known teratogenic effect associated with maternal use of the drug thalidomide during pregnancy.
The term is used specifically in medical, clinical, and historical contexts to describe a particular type of birth defect. It is a technical term. - The doctor diagnosed the newborn with phocomelia. - The lecture covered the history of phocomelia in relation to pharmaceutical regulation. - Phocomelia serves as a tragic example of the importance of drug safety testing during pregnancy.
- Etiological Context: The term is often linked directly to its historical cause, thalidomide. It can be used to discuss the consequences of teratogens.
- The epidemic of phocomelia in the late 1950s led to a major overhaul of drug approval processes.
- Descriptive in Medicine: Used to classify and describe the specific phenotype of limb malformation.
- The ultrasound revealed signs consistent with phocomelia of the upper limbs.
- Phocomelic (adjective): Pertaining to or characterized by phocomelia.
- The study focused on the phocomelic spectrum of disorders.
- Amelia: A related but distinct condition involving the complete absence of one or more limbs.
- Meromelia: A general term for the congenital absence of any part of a limb.
- Seal limb deformity (descriptive synonym, now considered outdated and potentially insensitive in clinical use).
- Thalidomide embryopathy (when specifically referring to the syndrome caused by that drug, which can include phocomelia as a feature).
This term has a single, highly specific medical meaning. It is not used in general language or metaphorically. Its usage is almost exclusively confined to discussions of medical history, teratology, and congenital disorders.
- 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