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Magnetic Resonance Imaging characteristics in case of TOR1AIP1 muscular dystrophy
Journal article   Open access   Peer reviewed

Magnetic Resonance Imaging characteristics in case of TOR1AIP1 muscular dystrophy

Aashim Bhatia, Bret C Mobley, Joy Cogan, Mary E Koziura, Elly Brokamp, John Phillips, John Newman, Steven A Moore, Rizwan Hamid and Undiagnosed Diseases Network (UDN)
Clinical imaging, Vol.58, pp.108-113
11/2019
DOI: 10.1016/j.clinimag.2019.06.010
PMCID: PMC6893088
PMID: 31299614
url
https://doi.org/10.1016/j.clinimag.2019.06.010View
Published (Version of record) Open Access

Abstract

Mutations in the torsinA-interacting protein 1 (TOR1AIP1) gene result in a severe muscular dystrophy with minimal literature in the pediatric population. We review a case of TOR1AIP1 gene mutation in a 16-year-old Caucasian female with a long history of muscle weakness. Extensive clinical workup was performed and MRI at time of initial presentation demonstrated no significant muscular atrophy with heterogenous STIR hyperintensity of the lower extremity muscles. MRI findings seven years later included extensive atrophy of the lower extremities, with severe progression, including the gluteal muscles, iliopsoas, rectus femoris, and obturator internus. There was also significant atrophy of the rectus abdominis and internal and external oblique muscles, and iliacus muscles. The MRI findings showed more proximal involvement of lower extremities and no atrophy of the tibialis anterior, making TOR1AIP1 the more likely genetic cause. Muscle biopsy findings supported TOR1AIP1 limb-girdle muscular dystrophy. Though rare, TOR1AIP1 gene mutation occurs in pediatric patients and MRI can aid in diagnosis and help differentiate from other types of muscular dystrophy. Genetic and pathology workup is also crucial to accurate diagnosis and possible treatment of these patients.
Adolescent Female Humans Lower Extremity - pathology Magnetic Resonance Imaging - methods Molecular Chaperones - genetics Muscle Weakness - pathology Muscle, Skeletal - pathology Muscular Atrophy - pathology Muscular Dystrophies, Limb-Girdle - genetics Muscular Dystrophies, Limb-Girdle - pathology

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