Midostaurin’s adverse effects include pancytopenia, infection, mucositis or stomatitis, pneumonitis or pulmonary infiltrates, GI tract intolerance (diarrhea, nausea), hepatotoxicity (increased alanine aminotransferase and hyperbilirubinemia), and electrolyte disturbances (hypokalemia, hyponatremia, hypophosphatemia, and hypocalcemia) [23]. The gene discussed is GPT; the disease is stomatitis.