ectromelia

Ectromelia is a congenital condition characterized by the absence of one or more extremities. The term "ectromelic" is an adjective used to describe conditions marked by ectromelia. This malformation arises from errors in the development of the limb bud during the early stages of intrauterine life, specifically between the fourth and eighth weeks.12

Other related conditions include amelia, where limbs are entirely absent; phocomelia, where the upper limb is underdeveloped or missing, with the lower part attached directly to the trunk; hemimelia, where the lower part of the limb is absent or rudimentary; and sirenomelia, a severe abnormality where the legs are fused. Treatment for these conditions often involves prosthetics and specialized training, with surgery used for minor malformations.1