When surgery is required the recommended procedure is a subtotal colectomy with end ileostomy. I meningiomas after subtotal (incomplete) tumor resections. Subtotal cor triatriatum with left partial anomalous pulmonary venous return. In the event of subtotal resection or widespread leptomeningeal disease, craniospinal irradiation is often used. The patients with total or subtotal block in preoperative myelography achieved the best result. Subtotal destruction of the host cell monolayer is less severe than total destruction. Usually, a subtotal of total direct costs is provided in the estimate. Monetary values are not shown, summary (subtotal) rows are missing as well. Subtotal removal is indicated when anything further risks life or neurological function. Subtotal destruction characteristically shows detachment of some but not all the cells in the monolayer. It is standardized in ISO 7000 as symbol ISO-7000-0650 ("Subtotal"). On equipment, especially calculators, the lozenge is used to mark the subtotal key.