Systemic mastocytosis associated with essential thrombocythemia

Vol. 53 No. 1, 2012


Camelia Dobrea, M. Ciochinaru, Amelia Gaman, E. Danaila, D. Coriu

Mastocytosis comprises a spectrum of disorders characterized by abnormal growth of mast cells (MS). Four entities are recognizable according to WHO classification. Association of systemic mastocytosis (SM) with a chronic myeloproliferative neoplasia (SM-AHNMD) is the second frequently category. Published descriptions of the clinicopathologic features of SM-AHNMD are largely limited to individual case reports. We present the case of a 41-year-old woman with thrombocytosis and mild splenomegaly. Clinical suspicion was of chronic myeloproliferative neoplasia (CMN). Bone marrow trephine biopsy examination (histology and immunohistochemistry for CD117 and CD25) revealed a SM associated with CMN, essential thrombocythemia (ET) type. The JAK2 V617F (for CMN) was detected but KIT / Asp816Val (reported in approx. 80% of SM) was absent. We discussed the particularity of the cases correlated with a review of the literature.

Corresponding author: Camelia Dobrea, MD, PhD, e-mail:

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