A 9-year-old girl has bruising noted on the extremities and…

A 9-year-old girl has bruising noted on the extremities and back, reportedly recurrent for one month duration. Lab results show a Hgb 7.1 g/dL, Hct 22.8%, MCV 89 fL, platelet count 63,000/µL, WBC count 19,128/µL. BM biopsy shows 100% cellularity with replacement by primitive cells with large nuclei, delicate chromatin; indistinct nucleoli with scanty cytoplasm. These cells mark for CD10 (CALLA) antigen. Which of the following is the most likely diagnosis?

A bone marrow sample evaluated for a patient describes the f…

A bone marrow sample evaluated for a patient describes the following notes: Erythropoiesis decreased. Erythrocytic precursors show abnormal development; nuclear bridging and budding. Rare precursor cells show iron stores ringing the nucleus Which disorder is suggested?