Marotta, Nicola Giant xanthogranuloma of the pelvis with S1 origin: Complete removal with only posterior approach, technical note. [electronic resource] - World journal of clinical cases Jan 2015 - 77-80 p. digital Publication Type: Case Reports; Journal Article ISSN: 2307-8960 Standard No.: 10.12998/wjcc.v3.i1.77 doi