ArticleSurgical neurology international2024
A novel leucine zipper-like transcriptional regulator 1 variant identified in a pair of siblings with familial schwannomatosis.
Article in Surgical neurology international, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Schwannomatosis is a rare genetic disorder marked by the emergence or predisposition to developing multiple schwannomas. Patients typically present with chronic pain or a mass in the second or third decade of life. Schwannomatosis is characterized by its associated gene, or if the specific gene is not known, then a descriptor is used. Here, we report a new Leucine zipper-like transcriptional regulator 1 (LZTR1) pathogenic variant identified in a pair of siblings with familial LZTR1-related schwannomatosis. Case Descriptions: A 35-year-old male presented for evaluation of the left lower extremity pain. Magnetic resonance imaging (MRI) demonstrated multiple lesions throughout his body, highly likely for schwannomatosis. He underwent surgical resection of two of these lesions, located in the left femoral nerve and distal shin. Pathology confirmed that the resected lesions were schwannomas. Six months later, his 34-year-old sister was referred and evaluated for a right ankle mass, previously diagnosed as a ganglion cyst. MRI of her right ankle demonstrated a one-centimeter subcutaneous tumor. She underwent surgical resection, and pathology confirmed that the tumor was a schwannoma. Both siblings elected to undergo genetic analysis for pathogenic variants associated with schwannomatosis. Both results were positive for the c.263del pathogenic variant of the LZTR1 gene associated with LZTR1-related schwannomatosis. Additionally, genetic analysis also determined the mother of the siblings also carried the same c.263del pathogenic variant. Conclusion: There are still schwannomatosis cases with novel switch/sucrose non-fermentable-related matrix-associated actin-dependent regulators of chromatin subfamily B member 1 or LZTR1 mutations to be reported. We report the first three cases of the c.263+1del LZTR1 pathogenic variant causing LZTR1-related schwannomatosis initially found in the two siblings. Identifying further LZTR1 pathogenic variants can give more insight into the pathogenicity of each variant.
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