Semin Liver Dis 2015; 35(04): 439-443
DOI: 10.1055/s-0035-1567834
Diagnostic Problems in Hepatology
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Hepatic Fibrinogen Storage Disease in a Patient with Hypofibrinogenemia: Report of a Case with a Missense Mutation of the FGA Gene

Michael J. Lee
1   Department of Pathology and Laboratory Medicine, Baylor University Medical Center, Dallas, Texas
,
Robert Venick
2   Department of Pediatric Gastroenterology, Ronald Reagan UCLA Medical Center, Los Angeles, California
,
Sunita Bhuta
3   Department of Pathology and Laboratory Medicine, Ronald Reagan UCLA Medical Center, Los Angeles, California
,
Xinmin Li
3   Department of Pathology and Laboratory Medicine, Ronald Reagan UCLA Medical Center, Los Angeles, California
,
Hanlin L. Wang
3   Department of Pathology and Laboratory Medicine, Ronald Reagan UCLA Medical Center, Los Angeles, California
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Publikationsverlauf

Publikationsdatum:
16. Dezember 2015 (online)

Abstract

We report a 9-year-old patient with abnormal liver tests found incidentally during routine bloodwork as part of a preoperative evaluation for excision of a benign cyst. A liver biopsy demonstrated hepatocytes to have pale and expanded cytoplasm that contained multiple vague globular eosinophilic inclusions. Electron microscopy showed fingerprint-like structures in the dilated cisternae of the rough endoplasmic reticulum, characteristic of fibrinogen. Whole exome sequencing identified a heterozygous missense mutation at codon 35 of the fibrinogen α (FGA) gene. No mutation was identified in the β or γ chains. His plasma fibrinogen levels were found to be decreased to 85 mg/dL (normal range 215–464). His family history was pertinent for his mother and maternal grandfather with hypofibrinogenemia. He had not had any significant bleeding episodes except for minor bruising over the shins. This case illustrates a rare etiology of storage disease that causes abnormal liver function tests.

 
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