LOBAR PRIMARY PULMONARY LYMPHOMA - IODINE-123-IODOAMPHETAMINE AND THALLIUM-201-CHLORIDE SCINTIGRAPHIC FINDINGS

A case of primary pulmonary malignant lymphoma (PML) was evaluated by I-123-IMP scintigraphy and (TlCl)-Tl-201 SPECT. Radiography and CT sho wed a so-called lobar consolidation on the chest that was difficult to differentiate from other benign conditions. However, I-123-IMP scinti graphy showed a defect corresponding to the lesion both in the early a nd delayed images, and (TlCl)-Tl-201 SPECT showed a higher retention i ndex than that of benign disorders. Both results were highly suggestiv e of malignancy. These scintigraphies can help differentiate PML from benign lesions and other malignant pulmonary tumors.