Anaplastic large cell lymphoma, with 1,25(OH)2D3-mediated hypercalcemia: A case report.

Anaplastic large cell lymphoma, with 1,25(OH)2D3-mediated hypercalcemia: A case report. J Clin Exp Hematop. 2019;59(1):22-28 Authors: Mitobe M, Kawamoto K, Suzuki T, Kiryu M, Nanba A, Suwabe T, Tanaka T, Fuse K, Shibasaki Y, Masuko M, Miyoshi H, Ohshima K, Sone H, Takizawa J Abstract Hypercalcemia due to malignant tumors including malignant lymphomas is relatively common. Among cancer patients with hypercalcemia, humoral hypercalcemia of malignancy is the most common and accounts for about 80% of all cases with hypercalcemia. 1,25-dihydroxyvitamin D3(1,25(OH)2D3)-mediated hypercalcemia is relatively rare. Although malignant lymphoma has been also reported to cause 1,25(OH)2D3-mediated hypercalcemia, it is not known whether there is any association between 1,25(OH)2D3-mediated hypercalcemia and any specific histological type of malignant lymphoma. We herein report a case of an anaplastic large cell lymphoma (ALCL), anaplastic lymphoma kinase (ALK) -negative with 1,25(OH)2D3-mediated hypercalcemia, which has never been previously reported. An 80-year-old Japanese man was admitted to our department due to acute exacerbation of hypercalcemia. He was diagnosed with ALCL, ALK-negative. Serum 1,25(OH)2D3 level was high and seemed to be associated with the lymphoma because the serum calcium and 1,25(OH)2D3 levels improved in response to chemotherapy. Histological findings showed that many CD68 positive macrophages were observed in the microe...
Source: Journal of Clinical and Experimental Hematopathology : JCEH - Category: Hematology Tags: J Clin Exp Hematop Source Type: research