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Familial Cancer

, Volume 10, Issue 2, pp 365–371 | Cite as

Novel germline SDHD mutation: diagnosis and implications to the patient

  • Jeena Varghese
  • Montserrat Ayala-Ramirez
  • Thereasa Rich
  • Eric Rohren
  • Priya Rao
  • Camilo Jimenez
Article
  • 103 Downloads

Abstract

A 54-year-old man presented with hypertensive crisis. He was found to have bilateral pheochromocytomas and left paraaortic sympathetic paraganglioma. Although he had no family history of paragangliomas or pheochromocytomas, he had been diagnosed with bilateral head and neck paragangliomas 10 years prior. The patient had symptoms of catecholamine excess exacerbated by vanilla ice-cream consumption. Biochemical testing revealed elevated plasma-free metanephrines and chromogranin A levels. Computed tomography showed bilateral carotid body tumors and four reteroperitoneal masses (two in the right adrenal, one in the left adrenal and one in the left paraaortic area). Metaiodobenzylguanidine-SPECT scans showed functional tumors in both the adrenal gland and left paraaortic area. Fluorine 18-fluorodeoxyglucose positron emission tomography did not show any visceral or skeletal metastasis. We carried out gene mutation analysis for succinate dehydrogenase complex subunit B, and succinate dehydrogenase complex subunit D. The patient was diagnosed with hereditary paraganglioma syndrome type 1 with a previously unreported subunit D mutation in exon 3 (c.198G > A, p.W66X). He was treated with phenoxybenzamine at 10 mg/day and with metoprolol at 12.5 mg/day. His blood pressures as well as symptoms of catecholamine excess were controlled. He then underwent bilateral adrenalectomy and reteroperitoneal dissection. His blood pressure normalized and he discontinued antihypertensive medications after surgery. He is currently on replacement therapy with hydrocortisone and fludrocortisone.

Keywords

Paraganglioma type 1 Head and neck paragangliomas Pheochromocytomas Sympathetic paragangliomas SDHD Adrenal insufficiency Flushing and vanilla ice-cream 

Abbreviations

mm Hg

Millimeters of mercury

CT

Computed tomography

MIBG

Metaiodobenzylguanidine

mCi

Millicuries

MEN

Multiple endocrine neoplasia

VHL

Von Hippel-Lindau disease

FDG

Fluorine 18 (18F)-fluorodeoxyglucose

PET

Positron emission tomography

SDH

Succinate dehydrogenase

PGL1

Paraganglioma syndrome type 1

MRI

Magnetic resonance imaging

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Jeena Varghese
    • 1
  • Montserrat Ayala-Ramirez
    • 1
  • Thereasa Rich
    • 2
  • Eric Rohren
    • 3
  • Priya Rao
    • 4
  • Camilo Jimenez
    • 1
  1. 1.Departments of Endocrine Neoplasia and Hormonal Disorders, Unit 1461The University of Texas MD Anderson Cancer CenterHoustonUSA
  2. 2.Departments of Surgical OncologyThe University of Texas MD Anderson Cancer CenterHoustonUSA
  3. 3.Departments of Nuclear MedicineThe University of Texas MD Anderson Cancer CenterHoustonUSA
  4. 4.Departments of PathologyThe University of Texas MD Anderson Cancer CenterHoustonUSA

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