<prompt> The most common cause of malignant adrenal mass isAdrenocoical carcinomaMalignant phaeochromocytomaLymphomaMetastasis from another solid tissue tumor  <response>: Ans. is d i.e., Metastasis from another solid tissue tumor The most common cause of adrenal tumors is metastasis from another solid tumor like breast cancer and lung cancer. Malignant Percentage Adrenocoical carcinoma 2-5 Malignant pheochromocytoma 