Figure 1. Patterns of HER2–PET/CT confronted with FDG–PET/CT, Maximum intensity projection. Lesion uptake was considered pertinent when visually higher than blood pool. (A) Entire tumor load showed pertinent tracer uptake; (B) dominant part of tumor load showed tracer uptake; (C) minor part of tumor load showed tracer uptake; (D) entire tumor load lacked tracer uptake. From: Molecular imaging as a tool to investigate heterogeneity of advanced HER2-positive breast cancer and to predict patient outcome under trastuzumab emtansine (T-DM1): the ZEPHIR trial Ann Oncol. 2015;27(4):619-624. doi:10.1093/annonc/mdv577 Ann Oncol | © The Author 2015. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved. For permissions, please email: journals.permissions@oup.com. 1