Fig. 4

HE stain images of samples used in fluorescence imaging. Each figure shows noncancerous tissue (left) and lesion area (PTC or other tissue) (right). Case 1: This is a representative fluorescence image corresponding to Case 1 in Fig. 2. Papillary carcinoma was well differentiated. Slight inflammation was seen in noncancerous tissue (left). Case 2: This PTC was also well differentiated. The noncancerous tissue was accompanied with light inflammation. Case 3: This PTC recurrence case was also a well-differentiated papillary carcinoma. Case 4: At first, this case was thought to be a malignant tumor because bleeding and necrosis were seen. HE staining established the final diagnosis as mediastinal goiter, an adenomatous goiter in the thymus. Case 5: Chronic inflammation case