Jj. Curtin et al., STAGHORN CALCULUS COMPLICATED BY PSOAS ABSCESS PRESENTING AS FLANK MASS IN A TEENAGER, British journal of radiology, 66(789), 1993, pp. 844-846
An 18-year-old male presented with a marked lack of symptoms despite t
he presence of a staghorn calculus complicated by a psoas abscess, whi
ch had herniated posteriorly through Petit's lumbar triangle.