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J Clin Endocrinol Metab. 2018 Jul 1;103(7):2417-2423. doi: 10.1210/jc.2017-02646.

Glucagonoma With Necrolytic Migratory Erythema: Metabolic Profile and Detection of Biallelic Inactivation of DAXX Gene.

Author information

1
Department of Clinical Cell Biology and Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
2
Division of Diabetes, Endocrinology, and Metabolism, Chiba University Hospital, Chiba, Japan.
3
Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
4
Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan.
5
Department of Dermatology, Graduate School of Medicine, Chiba University, Chiba, Japan.
6
Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan.
7
Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan.
8
Department of Pathology, Toranomon Hospital, Tokyo, Japan.

Abstract

Context:

Necrolytic migratory erythema (NME) occurs in approximately 70% of patients with glucagonoma syndrome. Excessive stimulation of metabolic pathways by hyperglucagonemia, which leads to hypoaminoacidemia, contributes to NME pathogenesis. However, the molecular pathogenesis of glucagonoma and relationships between metabolic abnormalities and clinical symptoms remain unclear.

Patient:

A 53-year-old woman was referred to our hospital with a generalized rash and weight loss. NME was diagnosed by histopathological examination of skin biopsy tissue. Laboratory tests revealed diabetes, hyperglucagonemia, marked insulin resistance, severe hypoaminoacidemia, ketosis, and anemia. Enhanced computed tomography scans detected a 29-mm pancreatic hypervascular tumor, which was eventually diagnosed as glucagonoma. Preoperative treatment with octreotide long-acting release reduced the glucagon level, improved the amino acid profile, and produced NME remission. Surgical tumor excision normalized the metabolic status and led to remission of symptoms, including NME.

Interventions:

Whole-exome sequencing (WES) and subsequent targeted capture sequencing, followed by Sanger sequencing and pyrosequencing, identified biallelic alteration of death-domain associated protein (DAXX) with a combination of loss of heterozygosity and frameshift mutations (c.553_554del:p.R185fs and c.1884dupC:p.C629fs) in the glucagonoma. Consistently, immunohistochemistry confirmed near-absence of DAXX staining in the tumor cells. Tumor expression of glucagon and somatostatin receptor subtype 2 and 3 messenger RNA was markedly upregulated.

Conclusions:

This is a report of glucagonoma with biallelic inactivation of DAXX determined by WES. The tumor manifested as glucagonoma syndrome with generalized NME. This case showed the relationship between hypoaminoacidemia and NME status. Further investigations are required to elucidate the underlying mechanisms of NME onset and glucagonoma tumorigenesis.

PMID:
29688432
DOI:
10.1210/jc.2017-02646
[Indexed for MEDLINE]

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