A congenital birth defect where a parasitic (extra) limb or limb-like structure grows from the stomach area of a fetus.
From gastro- (Greek gaster, 'stomach') + -melus (Greek melos, 'limb'). A rare teratological term describing severe developmental abnormalities.
Gastromelus is one of the rarest birth defects ever documented—it represents a parasitic twin that never fully separated, with an extra limb sprouting from the main body's stomach region!
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