title: Asymmetric agenesis of the mastoid antrum in a neonate.
abstract: The authors report a case of asymmetric development of the mastoid antrum in a neonate. The lack of mastoid development most likely represents a congenital maldevelopment. Agenesis of the mastoid antrum has surgical implications, as failure to recognize its absence can result in disorientation during surgery, with potential to injure adjacent structures.
authors.affiliation: Division of Otolaryngology, Children's National Medical Center, The George Washington University Medical Center, 111 Michigan Ave., NW, Washington, DC 20010-2970, USA. rshah@cnmc.org
authors.forename: Rahul K
authors.initials: RK
authors.lastname: Shah
authors.forename: Adarsh
authors.initials: A
authors.lastname: Vasanth
authors.forename: Collin S
authors.initials: CS
authors.lastname: Karmody
mesh_terms: D000015:Abnormalities, Multiple / Q000175:diagnosis*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008416:Mastoid / Q000002:abnormalities*; D010579:Petrous Bone / Q000002:abnormalities; D014057:Tomography, X-Ray Computed