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Case Reports
Journal Article
Germline mutations in PTEN and SDHC in a woman with epithelial thyroid cancer and carotid paraganglioma.
Nature Clinical Practice. Oncology 2007 October
BACKGROUND: A 43-year-old woman presented to a cancer genetics clinic for a genetic risk assessment because of her personal history of multiple neoplasias. At 37 years of age, she was diagnosed with multifocal papillary thyroid cancer, and within a year was further diagnosed with a paraganglioma of the left common carotid artery. Two years later, she was diagnosed with a paraganglioma of the right carotid body. All three tumors were treated with surgical resection. There was no family history of malignancy. Past medical history includes uterine leiomyoma and fibrocystic breast disease. Physical examination revealed macrocephaly and papillomatous papules.
INVESTIGATIONS: CT scan of the neck and thorax, 24-hour urine collection for measurement of metanephrines and catecholamines, MRI of the neck, thorax, and abdomen, metaiodobenzylguanidine scan, germline mutation analysis of PTEN, SDHB, SDHC and SDHD.
DIAGNOSIS: Cowden syndrome due to a germline mutation of PTEN, and pheochromocytoma-paraganglioma syndrome due to a germline mutation of SDHC.
MANAGEMENT: Clinical surveillance for breast, endometrial, thyroid, and renal cell carcinoma risks associated with Cowden syndrome according to the National Comprehensive Cancer Network guidelines, annual MRI of the neck, thorax, abdomen and pelvis, annual metabolic screening, and where available, annual 18-fluorodopamine PET scanning, predictive genetic testing of both PTEN and SDHC for the patient's daughter and parents.
INVESTIGATIONS: CT scan of the neck and thorax, 24-hour urine collection for measurement of metanephrines and catecholamines, MRI of the neck, thorax, and abdomen, metaiodobenzylguanidine scan, germline mutation analysis of PTEN, SDHB, SDHC and SDHD.
DIAGNOSIS: Cowden syndrome due to a germline mutation of PTEN, and pheochromocytoma-paraganglioma syndrome due to a germline mutation of SDHC.
MANAGEMENT: Clinical surveillance for breast, endometrial, thyroid, and renal cell carcinoma risks associated with Cowden syndrome according to the National Comprehensive Cancer Network guidelines, annual MRI of the neck, thorax, abdomen and pelvis, annual metabolic screening, and where available, annual 18-fluorodopamine PET scanning, predictive genetic testing of both PTEN and SDHC for the patient's daughter and parents.
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