Monarch Disease Ontology identifier MONDO_0007062 (adactylia, unilateral) is a rare, non-syndromic, terminal transverse limb reduction defect characterized by unilateral absence of the terminal portions of digits 2 to 5, with a mildly hypoplastic thumb and small nail remnants on the digital stumps. Metacarpal bones may be variably reduced. Also known as: Adactyly of hand, unilateral, adactylia unilateral, congenital absence/hypoplasia of fingers excluding thumb, unilateral, digits 2-5 hypodactyly, unilateral, digits 2-5 oligodactyly, unilateral.