synostosis hereditary disease humero-radio-ulnar synostosis https://github.com/monarch-initiative/mondo/issues/6751 https://github.com/monarch-initiative/mondo/issues/6876 https://github.com/monarch-initiative/mondo/issues/6877 https://www.malacards.org/card/isolated_humero_radio_ulnar_synostosis icd11.foundation:1798339866 Humero-radio-ulnar synostosis is an extremely rare, genetic, congenital joint formation defect disorder characterized by uni- or bilateral fusion of the humerus, radius and ulnar bones, leading to loss of elbow motion and, in most, functional arm incapacity. It may appear as distal humeral bifurcation with absent elbow joint and shortened arm length on imaging. Hand abnormalities, namely oligoectrosyndactyly, may be associated. GARD:0002749 humero-radio-ulnar fusion UMLS:C4751207 Orphanet:3266 MONDO:0017983 MEDGEN:1656946