Rapidly progressive autoimmune pancytopenia successfully treated with steroids

Area of Science:

• Hematology
• Immunology

Background:

• Pancytopenia, characterized by a reduction in all three blood cell lines, can stem from various causes, including autoimmune disorders.
• Evans syndrome, a condition involving autoimmune hemolytic anemia and immune thrombocytopenia, can sometimes be associated with other autoimmune cytopenias.

Observation:

• A 73-year-old woman presented with pancytopenia, elevated reticulated erythrocytes and platelets, a positive direct Coombs test, and hemolysis, initially suggesting Evans syndrome.
• Further investigation revealed decreased mature neutrophils and the presence of antineutrophil antibodies, indicating concurrent autoimmune neutropenia.
• The patient had no identifiable underlying conditions, leading to a diagnosis of idiopathic autoimmune pancytopenia.

Findings:

• The patient was diagnosed with idiopathic autoimmune pancytopenia, a complex hematological disorder involving autoimmune destruction of multiple blood cell lineages.
• Antineutrophil antibodies were confirmed via immunofluorescence, supporting the autoimmune neutropenia component of the pancytopenia.

Implications:

• This case underscores the importance of comprehensive immunological workup in pancytopenia cases, even when initial findings suggest a more common diagnosis like Evans syndrome.
• The successful treatment with prednisolone indicates its potential efficacy in managing idiopathic autoimmune pancytopenia, offering a therapeutic option for this rare condition.