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Updated: Mar 24, 2026

Immunostaining-Based Detection of Dynamic Alterations in Red Blood Cell Proteins
Published on: March 17, 2023
A SEVEN-YEAR-OLD MALE WITH CIRCULATING RED BLOOD CELLS SHOWING A THERMAL INJURY-LIKE MORPHOLOGY
R Shackelford1, J Ansari2, D Veillon3
1Dr. Shackelford is associated with the Department of Pathology.
Insights
Hereditary pyropoikilocytosis is a rare red blood cell disorder causing anemia and jaundice. This case highlights unusual erythrocyte morphology in a pediatric patient, aiding diagnosis.
Area of Science:
- Hematology
- Genetics
Background:
- Hereditary pyropoikilocytosis (HPP) is a rare, inherited hemolytic anemia.
- It is characterized by abnormal red blood cell shape and fragility.
Observation:
- A pediatric patient presented with a history of hematuria, jaundice, and anemia.
- Family history revealed similar symptoms in his father and sister, diagnosed with HPP.
- Peripheral blood smear showed extreme erythrocyte poikilocytosis with bizarre forms.
Findings:
- Laboratory studies confirmed hemolytic anemia with elevated alkaline phosphatase and bilirubin.
- Erythrocyte morphology was highly unusual, resembling that seen in severe thermal burns.
Implications:
- This case underscores the importance of considering HPP in pediatric patients with unexplained hemolytic anemia and abnormal red blood cell morphology.
- Recognizing these distinctive erythrocyte shapes can aid in the diagnosis of HPP, even in atypical presentations.
- Further research into the genetic basis and clinical spectrum of HPP is warranted.
Abstract:
A seven-year-old African-American male presented with a history of hematuria, proteinuria, jaundice, and anemia occasionally treated with transfusions since early childhood. The family history included a father and sister with similar symptoms of anemia, both of which had been diagnosed with hereditary pyropoikilocytosis. Due to the patient's family history and symptoms indicating a possible hematologic problem, a blood draw was performed. Laboratory studies showed an elevated alkaline phosphatase and bilirubin, and hemolytic anemia with unusual erythrocyte indices. The patient's vital signs and abdominal ultrasound were normal, and he had no known allergies. Examination of the patient's peripheral blood smear revealed extreme erythrocyte poikilocytosis with bizarre forms resembling the erythrocyte morphology sometimes seen in individuals with severe thermal burns.
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