Adult cholesteryl ester storage disease (CESD): Three case reports

Introduction Adult cholesteryl ester storage disease (CESD) is characterized by an autosomal-recessive deficiency of lysosomal acid lipase (LAL), which leads to accumulation of cholesteryl esters/triglycerides in macrophages with consecutive hepatosplenic involvement. In contrast to infantile Wolman disease, CESD follows a more benign clinical course. Sebelipase-α (Kanuma®​, Alexion) is a recombinant form of LAL approved in 2015 as enzyme replacement therapy (ERT) for CESD.

Methods Single-center retrospective study of CESD patients between 1999-2021.

Results Three patients were diagnosed with CESD. Patient #1 was a 36-year-old woman with hepatosplenomegaly and anemia, suspected for Gaucher´s disease. Palpebral xanthelasmata, enlarged supraclavicular lymph nodes and severe splenomegaly were noted. LDL/HDL was 211/25 mg/dl. Bone marrow aspirates revealed sea-blue histiocytes. Plasma chitotriosidase activity (CTA) was 827 nmol/ml/h (Ref. 20-100) and fibroblasts exhibited a 15-fold increase of cholesteryl esters. LAL activity was reduced and mutational analysis confirmed the diagnosis of CESD.

Pats. #2/#3 were siblings aged 30/32 with severe hepatomegaly and xanthelasmata. Total cholesterol was 480/500 mg/dl, livers were massively enlarged, with only slight splenomegaly. CTA was elevated 2-3 fold in both cases. Therapies with statins/colestyramin/colesevelam and ERT with sebelipase alpha decreased liver volume.

Conclusion In patients with liver steatosis, hepatosplenomegaly and elevated LDL/HDL ratio/hypercholesterolemia, CESD should be considered. Sebelipase-α improves visceral manifestations in this lysosomal storage disease.

Publikationsverlauf

Artikel online veröffentlicht:
26. Januar 2022