Five cases of psoas abscesses are discussed, four pyogens and one tube
rculous, the current etiology of this process, together with its patho
genia and clinical manifestations are discussed. In all of them the gu
ided punction through Computerized Axial Tomography (CAT) has been the
way to diagnose and treat the process. Utility of this technique cons
idering both aspects is discussed because it allows to determine the e
tiology and avoids the surgical drainage; even tough this therapy shou
ld be individualized in each case, probably is in primary staphylococc
i abscesses where this therapeutic option is best indicated.