SMN1 and neoplasm: On dynamic CT scan images, the median tumor size was 32.9 mm and the incidence of tumor–vascular contact or invasion of ≥180° was 47.0% (150/319) for SMV/PV, 17.2% (55/319) for CA, 24.1% (77/319) for SMA, and 18.1% (67/319) for CHA contact.