Siopen Scoring System

**Semantic type:** Intellectual Product

**Definition:** A scoring system used to measure metastatic response to therapy using 123I-metaiodobenzylguanidine scintigraphy, in which 12 regions of the body are scored. (Lewington V, Lambert B, Poetschger U, Sever ZB, Giammarile F, McEwan AJB, Castellani R, Lynch T, Shulkin B, Drobics M, Staudenherz A, Ladenstein R. 123I-mIBG scintigraphy in neuroblastoma: development of a SIOPEN semi-quantitative reporting method by an international panel. Eur J Nucl Med Mol Imaging. 2017 Feb;44(2):234-241.)

**Synonyms:** - SIOPENSC - Siopen Absolute Score - Siopen Absolute Score - Siopen Score