Dyslipidemias pp 235-250 | Cite as

Sitosterolemia and Other Rare Sterol Disorders

  • Shailendra B. PatelEmail author
Part of the Contemporary Endocrinology book series (COE)


Rare monogenic disorders that disrupt sterol metabolism are now increasingly recognized as causing human disease and, more importantly, specific therapies that can prevent or ameliorate the complications are increasingly available. Thus, genetic defects that were thought previously to be exoteric or where no treatments could be offered are now beginning to populate the treatable spectrum of disease. These diseases, by definition of being rare, affect less than 1000 people in the USA. The key to diagnosing these conditions is the knowledge of these conditions. Sterol (as opposed to steroid) disorders include those that are caused by defects involving sterol synthesis genes, typically involving the postsqualene intermediates, or sterol breakdown genes (typically the bile acid pathway) or pathways that regulate sterol absorption and excretion. This chapter highlights one example in each of these pathways to illustrate the current state of the art, elucidate diagnostic procedures, and highlight specific therapies, where available.


ABCG5 ABCG8 Bile acids Cataracts Chenodeoxycholic acid Ezetimibe Hypolipoproteinemia Macrothrombocytopenia Sitosterol Smith–Lemli–Opitz syndrome Xanthomas 


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Copyright information

© Humana Press 2015

Authors and Affiliations

  1. 1.Department of Medicine and Division of Endocrinology, HRC4850, Division of EndocrinologyClement J Zablocki Veterans Affairs Medical Center, and Medical College of WisconsinMilwaukeeUSA

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