An usual cause of elliptocytosis.

We report a 60-year-old adult case with a normocytic normochromic regenerative anemia discovered incidentally. The objectification of elliptocytosis accompanied by splenomegaly, a collagen myelofibrosis and the presence of the mutation JAK2V617F allowed the diagnosis of primary myelofibrosis with atypical initial presentation. The causes of elliptocytoses are discussed.