Figure 5.

Dynamic change of imaging characteristics and proGRP levels of the patient who was unresponsive to treatment. A, imaging characteristics; B, proGRP levels. Note: After the fifth cycle of chemotherapy, only chest CT, but no cranial MRI, was performed; after the sixth cycle of chemotherapy, both chest CT and cranial MRI were not performed; stars, radiological examination was performed here (chest CT or cranial MRI); arrows, chemotherapy or radiotherapy was given here. proGRP, progastrin releasing peptide; CT, computed tomography; MRI, magnetic resonance imaging