title: Unilateral lateral mass hypertrophy: An extremely rare congenital anomaly of atlas.
abstract: A wide variety of congenital anomalies are observed around the craniovertebral junctional area. However, hypertrophied unilateral lateral mass of atlas in association with chiari-1 malformation leading to myelopathy is extremely uncommon. Herein we report a case of 28-year-old female who presented to us with a high cervical compressive myelopathy. Imaging revealed bony hypertrophy involving right sided C1 lateral mass along with chiari malformation-type 1. She underwent transoral as well as posterior decompression followed by occipito-cervical fusion. The authors discuss their case in light of other such reported cases and present a review of the literature.
authors.affiliation: Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Kuntal Kanti
authors.initials: KK
authors.lastname: Das
authors.affiliation: Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Anant
authors.initials: A
authors.lastname: Mehrotra
authors.affiliation: Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Rabi Narayan
authors.initials: RN
authors.lastname: Sahu
authors.affiliation: Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Arun Kumar
authors.initials: AK
authors.lastname: Srivastava
authors.affiliation: Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Awadhesh Kumar
authors.initials: AK
authors.lastname: Jaiswal
authors.affiliation: Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Behari
keywords: C1 lateral mass; chiari malformation type 1; compressive myelopathy; hypertrophy; surgery; unilateral
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