Hodgkin disease and red cell aplasia

Area of Science:

• Hematology
• Oncology
• Immunology

Background:

• Hodgkin disease (HD) is a lymphoid malignancy.
• Pure red cell aplasia (PRCA) is a rare condition characterized by the selective absence of erythroid precursors in the bone marrow.
• Autoimmune phenomena can occur in patients with lymphomas.

Observation:

• A teenage boy with mixed-cellularity Hodgkin disease presented with severe anemia.
• Bone marrow examination showed PRCA without lymphomatous infiltration or hemolysis.
• Serum studies revealed an IgG inhibitor of erythropoietin activity, not directly binding erythropoietin.

Findings:

• The patient's anemia resolved completely after chemotherapy for Hodgkin disease.
• The erythropoietin inhibitor disappeared concurrently with the resolution of anemia.
• The inhibitor likely targeted an early stage of red blood cell production.

Implications:

• This case highlights an unusual paraneoplastic manifestation of Hodgkin disease.
• The findings suggest a potential autoimmune mechanism underlying PRCA in lymphoma.
• This phenomenon may offer insights into the broader spectrum of autoimmune complications in lymphoid malignancies.