UNEXPECTED BONE-MARROW UPTAKE OF TL-201 IN NONSECRETORY MYELOMA

A 43-yr-old man was referred for any possible parathyroid abnormality that could explain his hypercalcemia and slightly increased parathormo ne levels. The thallium-technetium scan showed a diffuse abnormal thal lium uptake incidentally in the bone marrow, otherwise parathyroid sca n appearance was normal. He had an essentially normal bone scan, altho ugh subsequent nanocolloid scintigraphy demonstrated bone marrow expan sion. Further investigations, including a bone marrow aspiration biops y, confirmed the diagnosis of nonsecretory myeloma. This finding sugge sts that Tl-201 imaging can be a useful tool to investigate those pati ents suffering from similar myeloid disorders causing bone marrow hype rplasia.