TY - JOUR T1 - Mastoid pneumocele causing atlantooccipital pneumatization. JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1231 LP - 1233 VL - 19 IS - 7 AU - M L Martin AU - R Bhargava AU - R A Ashforth AU - D B Russell Y1 - 1998/08/01 UR - http://www.ajnr.org/content/19/7/1231.abstract N2 - A 49-year-old woman had a palpable mass in her occipital region. Plain radiographs and CT examination revealed extensive atlantooccipital pneumatization with findings consistent with the diagnosis of mastoid pneumocele. Decompression was achieved with placement of a myringotomy tube, resulting in prompt symptomatic relief. On a follow-up CT examination, the pneumatized areas had become opacified and new bone formation was present. ER -