Splenic rupture in acute megakaryoblastic leukemia

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• Acute megakaryoblastic leukemia (AMKL) is a rare subtype of acute myeloid leukemia.
• AMKL is characterized by the proliferation of immature cells of megakaryocytic lineage.
• Clinical presentation often includes pancytopenia and circulating blast cells.

Observation:

• A 43-year-old male presented with pancytopenia and circulating blast cells.
• Bone marrow biopsy revealed reticulin fibrosis and blast cell infiltration.
• Cytogenetic analysis showed 48,XY,+15,+18.

Findings:

• The megakaryocytic origin of blast cells was confirmed via ultrastructural platelet peroxidase reaction.
• The patient developed rapid splenomegaly, which was not palpable on admission.
• The spleen ruptured spontaneously, a critical and previously undocumented complication of AMKL.

Implications:

• This case highlights a novel and life-threatening splenic complication associated with acute megakaryoblastic leukemia.
• The findings underscore the importance of vigilant monitoring for organomegaly in AMKL patients.
• Further research may be warranted to understand the mechanisms leading to splenic rupture in this leukemia subtype.