Autopsy case of adult T cell leukemia associated with hypertrophy of the parathyroid glands

: An autopsy case of adult T cell leukemia associated with hypercalcemia and hyperplastic parathyroid glands is reported. A 51-year-old man complained of systemic lymphadenopathy and hepato-splenomegaly; a diagnosis of adult T cell leukemia was made based on clinico-pathological findings. The pathogenesis of hypercalcemia in adult T cell leukemia is discussed. However, cases associated with hyperplasia of the parathyroid gland are very rare. We emphasize the role of the parathyroid gland in the pathogenesis of hypercalcemia in adult T cell leukemia.