Article ; Online: Pseudohyperkalemia due to cryohydrocytosis in GLUT1 deficiency syndrome. A case report and literature review.
Epileptic disorders : international epilepsy journal with videotape
2023 Volume 25, Issue 3, Page(s) 410–415
Abstract: Cryohydrocytosis is a form of stomatocytosis characterized by the leakage of sodium and potassium from red blood cells at low temperatures, characterized by pseudohyperkalemia. Stomatin-deficient cryohydrocytosis is an extremely rare variant that only ... ...
Abstract | Cryohydrocytosis is a form of stomatocytosis characterized by the leakage of sodium and potassium from red blood cells at low temperatures, characterized by pseudohyperkalemia. Stomatin-deficient cryohydrocytosis is an extremely rare variant that only recently has been related to pathogenic variants in the SLC2A1 gene, encoding the main glucose transporter of the blood-brain barrier and red blood cells, GLUT1. It follows that GLUT1 deficiency syndrome, a rare but significant cause of metabolic epilepsy, may present with stomatin-deficient cryohydrocytosis, although this correlation has only been reported in a few instances. We present the case of a patient carrying a novel de novo SLC2A1 pathogenic variant presenting with GLUT1 deficiency syndrome, pseudohyperkalemia, and splenomegaly consistent with cryohydrocytosis. We also review the previously reported cases of stomatin-deficient cryohydrocytosis in the literature. As highlighted by our case, elevated potassium levels are a cause of concern, and GLUT1 deficiency syndrome patients are thus at risk of being subjected to unnecessary examinations; pseudohyperkalemia may be underrecognized in clinical practice. |
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MeSH term(s) | Humans ; Hyperkalemia/diagnosis ; Hyperkalemia/etiology ; Epilepsy/genetics ; Potassium/metabolism |
Chemical Substances | Potassium (RWP5GA015D) |
Language | English |
Publishing date | 2023-04-27 |
Publishing country | United States |
Document type | Case Reports ; Review ; Journal Article |
ZDB-ID | 2086797-9 |
ISSN | 1950-6945 ; 1294-9361 |
ISSN (online) | 1950-6945 |
ISSN | 1294-9361 |
DOI | 10.1002/epd2.20039 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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