Summary
Definition
HS is an inherited abnormality of the red blood cell, caused by defects in structural membrane proteins. Globally, it is the most common red blood cell membrane disorder.[1]
The condition is dominantly inherited in 75% of people.[2] The severity of the disorder is related to the type and amount of membrane disruption, which is genetically determined. The abnormal cells are spherical. They are removed by the spleen, resulting in a reduced red-cell life span that deviates from the norm of 120 days by a variable degree. In severe cases, red-cell life span may be only 10 days. The severity of haemolysis varies between different individuals and can be exacerbated by infection. HS is associated with splenomegaly (commonly), anaemia (variably) with an increased reticulocyte count, and jaundice (occasionally). [Figure caption and citation for the preceding image starts]: Blood smear of a patient with HS; spherocyte indicatedFrom the collection of Shelley Crary, University of Texas Southwestern Medical Center, TX; used with permission [Citation ends].
History and exam
Key diagnostic factors
- presence of risk factors
- positive family history
- pallor
- jaundice
- splenomegaly
Other diagnostic factors
- fatigue
- hydrops foetalis or stillbirth
Risk factors
- family history of splenectomy, anaemia, jaundice, or hereditary spherocytosis (HS)
- at risk demographic
Diagnostic investigations
1st investigations to order
- FBC
- reticulocyte count
- blood smear
- serum bilirubin
- serum aminotransferases
- direct anti-globulin test (DAT)
Investigations to consider
- eosin-5-maleimide binding test
- acidified glycerol lysis test
- cryohaemolysis test
- genetic analysis
- sodium dodecyl sulfate-polyacrylamide gel electrophoresis
Treatment algorithm
neonates (<28 days old)
infants (>28 days old), children, and adults: severe hereditary spherocytosis (HS)
infants (>28 days old), children, and adults: mild-to-moderate hereditary spherocytosis (HS)
Contributors
Authors
Shelley Crary, MD, MSCS
Associate Professor of Pediatrics
University of Arkansas for Medical Sciences
Little Rock
AR
Disclosures
SC is reimbursed for membership on a drug and safety monitoring board (Novartis) for a non-related drug.
Acknowledgements
Dr Shelley Crary would like to gratefully acknowledge Dr Paula Bolton-Maggs, a previous contributor to this topic.
Disclosures
PB-M has received travel and accommodation payments to give a series of lectures on paediatric haematology, one of which was on HS. She also was an expert witness in a legal case concerning a child with HS. PB-M is an author of some references cited in this topic.
Peer reviewers
Robert Schilling, MD
Professor of Medicine Emeritus
School of Medicine and Public Health
University of Wisconsin-Madison
Madison
WI
Disclosures
RS is an author of a number of references cited in this topic.
References
Key articles
Eber SW, Armbrust R, Schroter W. Variable clinical severity of hereditary spherocytosis: relation to erythrocytic spectrin concentration, osmotic fragility, and autohemolysis. J Pediatr. 1990 Sep;117(3):409-16. Abstract
Bolton-Maggs PH, Langer JC, Iolascon A, et al; General Haematology Task Force of the British Committee for Standards in Haematology. Guidelines for the diagnosis and management of hereditary spherocytosis - 2011 update. Br J Haematol. 2012 Jan;156(1):37-49.Full text Abstract
Perrotta S, Gallagher PG, Mohandas N. Hereditary spherocytosis. Lancet. 2008 Oct 18;372(9647):1411-26. Abstract
King MJ, Garçon L, Hoyer JD, et al. ICSH guidelines for the laboratory diagnosis of nonimmune hereditary red cell membrane disorders. Int J Lab Hematol. 2015 Jun;37(3):304-25.Full text Abstract
Iolascon A, Andolfo I, Barcellini W, et al. Recommendations regarding splenectomy in hereditary hemolytic anemias. Haematologica. 2017 Aug;102(8):1304-13.Full text Abstract
Davies JM, Lewis MP, Wimperis J, et al. Review of guidelines for the prevention and treatment of infection in patients with an absent or dysfunctional spleen: prepared on behalf of the British Committee for Standards in Haematology by a working party of the Haemato-Oncology task force. Br J Haematol. 2011 Nov;155(3):308-17.Full text Abstract
Reference articles
A full list of sources referenced in this topic is available to users with access to all of BMJ Best Practice.
Differentials
- Non-haemolytic anaemia
- Other causes of haemolytic anaemia
- Other causes of spherocytosis
More DifferentialsGuidelines
- Recommendations regarding splenectomy in hereditary hemolytic anemias
- ICSH guidelines for the laboratory diagnosis of nonimmune hereditary red cell membrane disorders
More GuidelinesPatient information
Jaundice in newborn babies: what is it?
Jaundice in newborn babies: what treatments work?
Mais Patient information
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