PT - JOURNAL ARTICLE AU - S C Chin AU - C Y Chen AU - R A Zimmerman TI - Pericoccygeal hidrocystoma. DP - 1998 Mar 01 TA - American Journal of Neuroradiology PG - 587--588 VI - 19 IP - 3 4099 - http://www.ajnr.org/content/19/3/587.short 4100 - http://www.ajnr.org/content/19/3/587.full SO - Am. J. Neuroradiol.1998 Mar 01; 19 AB - We report the imaging findings of pericoccygeal hidrocystoma in a 52-year-old woman. Sonography showed a large cystic lesion with internal echoes in the pericoccygeal region; it appeared as a well-defined, low-density mass on CT, and as a high-signal-intensity mass on T1- and T2-weighted MR images. Histopathologic examination revealed an apocrine hidrocystoma.