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2 Cases of Intra-Labyrinthine Schw annomas With Different Treatment Options Based on Clinical Presentation
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Vestibular schwannoma is a benign tumor that arises from the eighth cranial nerve and is themost common neoplasm in the internal auditory canal (IAC). It typically arises in the cerebel-lopontine angle or in IAC; however, in rare cases, they can arise within the labyrinth. Thesetumors arising in the labyrinth have been termed intra-labyrinthine schwannomas (ILS) andhave different clinical features than the typical vestibular schwannomas. Clinical manifesta-tions of an ILS typically include hearing loss, tinnitus, and vertigo, with unusual symptomsincluding a sense of fullness or imbalance. Temporal bone MRI is considered the most impor-tant test for diagnosing ILS. Tumors show nodular enhancement on T1-weighted images andfilling defects on T2-weighted images. Treatment of ILS may include observation, microsurgi-cal resection, and stereotactic radiosurgery depending on the location, size, and clinical pre-sentation. In this paper, we present two cases diagnosed as ILS with different treatment op-tions and provide a literature review for each case.
Abstract
Vestibular schwannoma is a benign tumor that arises from the eighth cranial nerve and is themost common neoplasm in the internal auditory canal (IAC). It typically arises in the cerebel-lopontine angle or in IAC; however, in rare cases, they can arise within the labyrinth. Thesetumors arising in the labyrinth have been termed intra-labyrinthine schwannomas (ILS) andhave different clinical features than the typical vestibular schwannomas. Clinical manifesta-tions of an ILS typically include hearing loss, tinnitus, and vertigo, with unusual symptomsincluding a sense of fullness or imbalance. Temporal bone MRI is considered the most impor-tant test for diagnosing ILS. Tumors show nodular enhancement on T1-weighted images andfilling defects on T2-weighted images. Treatment of ILS may include observation, microsurgi-cal resection, and stereotactic radiosurgery depending on the location, size, and clinical pre-sentation. In this paper, we present two cases diagnosed as ILS with different treatment op-tions and provide a literature review for each case.
참고문헌 (10)
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