Systemic mastocytosis (SM), a rare myeloid neoplasm, is characterized by the pathological proliferation of mast cells in various organs. The most common symptoms include anaphylaxis, urticaria, abdominal pain, diarrhea, and depression. However, SM may also present with uncommon manifestations, such as osteosclerotic lesions. Diagnosis is based on elevated serum tryptase and specific bone marrow alterations according to the World Health Organization criteria. We present the case of a 38-year-old male with systemic mastocytosis, initially presenting with bone pain, polyclonal hypergammaglobulinemia, and osteosclerotic lesions. The diagnosis was confirmed through bone marrow biopsy, and the patient showed clinical improvement with sodium cromoglycate treatment.
La mastocitosis sistémica es un trastorno raro con acumulación patológica de mastocitos en los tejidos. Los síntomas iniciales más frecuentes son anafilaxia, urticaria, dolor abdominal, diarrea y depresión. Existen otras manifestaciones iniciales menos frecuentes como las lesiones óseas escleróticas. Su diagnóstico se basa en la elevación de triptasa y alteraciones de médula ósea según los criterios de la Organización Mundial de la Salud. Se presenta el caso de un varón de 38 años con dolor óseo generalizado, hipergammaglobulinemia policlonal y lesiones blásticas, diagnosticándose de mastocitosis sistémica tras biopsia ósea, con buena evolución tras inicio de tratamiento con cromoglicato disódico
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