Cancer Frequency in MuSK Myasthenia Gravis and Histological Evidence of Paraneoplastic Etiology.

Falso, Silvia; Gessi, Marco; Marini, Sofia; Benvenuto, Roberta; Sabatelli, Eleonora; D'Amati, Antonio; Marini, Martina; Evoli, Amelia et al. · Ann Neurol · 2024

case_series · Level IV

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Abstract

Cancer frequency in muscle-specific kinase myasthenia gravis (MuSK-MG) has not yet been explored and the mechanisms leading to the formation of MuSK IgG remain elusive. We aimed to explore cancer frequency in MuSK-MG patients and to assess MuSK expression in cancer cells from 2 tumors occurred in this cohort. Immunohistochemistry on tumor specimens revealed the expression of MuSK in the cancer cells from primary mediastinal B cell lymphoma and endometrial carcinoma. Twenty-one males and 73 females were enrolled. Fifteen cancers occurred in 13 of 94 patients (13.8%). Patients with cancer were significantly older at time of MuSK-MG onset. ANN NEUROL 2024;96:1020-1025.

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