obsolete_Becker nevus syndrome https://rarediseases.info.nih.gov/diseases/3856/becker-nevus-syndrome true MESH:C565735 GARD:0003856 Becker nevus syndrome is characterized by the presence of a Becker nevus in association withunderdevelopment (hypoplasia)of the breast or other skin-related, muscular, or skeletal defects, all of which usually involve the same side of the bodyas the nevus (ipsilateral). Specific signs and symptoms in addition to the nevus may include ipsilateral breast hypoplasia;skeletal abnormalities such ashypoplasia of the shoulder girdle, scoliosis, fused ribs, and ipsilateral shortness of the arm; and several other features. Thecondition is thought to be sporadic (occurring in individuals with no history of the condition in the family). Treatment varies depending upon the specific symptoms present and the extent of the condition in the affected individual. hairy epidermal nevus syndrome Orphanet:64755 UMLS:C1858042 3.41.0 pigmentary hairy epidermal nevus http://purl.obolibrary.org/obo/MONDO_0011500 Becker nevus syndrome ICD10:D22.5 Replaced with Mondo term. OMIM:604919