A patient demonstrating long tumor dormancy. 57 y.o. female with mediastinal lymph node metastasis. CT images at (A) pretreatment state and (B) post-treatment state, PET images at (C) pretreatment state and (D) post-treatment state, fused PET/CT images at (E) pretreatment state and (F) post-treatment state. The diameter of mediastinal lymph node decreased 7% and its SUVmax decreased 20% in post-sunitinib treatment state. She maintained an SD for 887 days.