The major findings are as follows: (1) the expression of TGFβ1 was upregulated in patients with MMD; (2) the level of TGFβ1 had a positive correlation with VEGF in plasma, which is related to the transdural collateral in patients with MMD; and (3) TGFβ1 upregulated VEGF to promote angiogenesis through the activation of the TGFβ signaling pathway. The gene discussed is TGFB1; the disease is multiminicore myopathy.