[Leukemoid reaction caused by hypernephroma primary diagnosed as chronic granulocytic leukemia]

A case of leukemoid reaction associated with renal carcinoma is presented. On account of the high leukocyte count and a palpable abdominal mass in the upper left quadrant, interpreted as an enlarged spleen, the primary tentative diagnosis was chronic granulocytic leukemia. Abdominal ultrasonographic scan revealed an enlarged left kidney and subsequent nephrectomy revealed a large hypernephroma. Leukemoid reactions associated with malignant disease are described in general with emphasis on the differential diagnosis.