Utility of (111)In-Cl3 scintigraphy for differentiating bone marrow reconversion.

Indium chloride ((111)In-Cl3) scintigraphy has been used to evaluate various hematological diseases for many years. However, there have been few reports on patients with bone marrow reconversion showing high uptake in (111)In-Cl3 scintigraphy. Herein, we report a case of a 68-year-old man with esophageal cancer who underwent (18)F-FDG PET/CT for staging of the disease. (18)F-FDG PET/CT demonstrated high uptake in the first lumbar vertebral body, which was difficult to distinguish bone metastasis and bone marrow reconversion. (111)In-Cl3 scintigraphy demonstrated specific findings with high uptake in the lesion, indicating bone marrow hyperplasia or reconversion.