Sitosterolemia Presenting as Thrombocytopenia and Anemia with Abdominal Pain.

Indian J Pediatr

Department of Clinical Laboratory, South China Hospital, Medical School, Shenzhen University, Shenzhen, China.

Published: January 2025

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http://dx.doi.org/10.1007/s12098-024-05311-xDOI Listing

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Sitosterolemia is a rare autosomal recessive disorder characterized by impaired excretion of plant sterols, leading to their accumulation in tissues and organs. We identified a hitherto unreported homozygous variant, in ATP-binding cassette sub-family G member 5 (ABCG5) (NM_022436.3) c.

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Background: Patients suffering from sitosterolemia with ABCG5/8 mutation typically present with early-onset or rapidly progressive atherosclerosis. Their kindreds with partial genetic deficiencies of ABCG5/8 are often considered healthy. However, discerning sitosterolemia from its familial kindreds and hyperlipidemia subjects has remained challenging.

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Sitosterolemia is a rare autosomal recessively inherited lipid disorder characterized by an accumulation and deposition of phytosterols in various tissues with decreased biliary excretion leading to various complications. We report a case of a three-year-old Saudi girl who exhibited xanthomas and elevated cholesterol levels. Initially, she was misdiagnosed with familial hypercholesterolemia, but subsequent testing of the low-density lipoprotein receptor gene by next-generation sequencing ruled out this condition.

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Cerebral involvement in sitosterolemia.

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  • Sitosterolemia is a rare genetic condition leading to abnormal metabolism of plant sterols, resulting in symptoms like skin xanthomas and early heart disease, but brain damage related to the condition hasn't been well-studied.
  • * Researchers examined a family with severe cases of sitosterolemia, where a 66-year-old female patient showed neurological issues including weakness and incontinence, along with brain imaging revealing abnormalities and cholesterol crystal deposits.
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