NCIthesaurus disease has location anus disease skin disease vein disease pelvic varices hemorrhoid MESH:D006484 UMLS_CUI:C0019112 SNOMEDCT_US_2025_09_01:70153002 disease_ontology DOID:9746 ICD10CM:K64 A pelvic varices that is characterized by swollen, inflamed veins around the anus or lower rectum. NCI:C26792 ICD9CM:455 hemorrhoidal disease anus perianal skin