Homo sapiens pisiform http://upload.wikimedia.org/wikipedia/commons/5/50/Carpus.png A laterally positioned sesamoid bone found in close proximity with and occasionally fused to the ulnare. UBERON:0001429 os pisiforme check: accessory carpal NCIT:C12855 accessory carpal bone SCTID:181966004 Wikipedia:Pisiform_bone MA:0001339 UMLS:C0223729 FMA:23718 galen:Pisiform EMAPA:36165 SCTID:9181003 pisiform bone proximal carpal bone sesamoid bone of manus Melissa Haendel Christopher J. Mungall