SEMA3F and small cell lung carcinoma: SEMA3F is a secreted protein that has been reported to function as a axon guidance factor, a tumor suppressor gene in small cell lung cancer, a inhibitor of angiogenesis, and a possible direct inhibitor of tumor cell migration and attachment.[93] Although there have been no previous reports describing SEMA3F expression in AML, our comparison included three papers that associated increased expression of SEMA3F with a good prognosis, which suggest that a SEMA3F analog could have potential for treatment in AML.