title: A rare case of juvenile hypertension: coexistence of type 2 multiple endocrine neoplasia -related bilateral pheochromocytoma and reninoma in a young patient with ACE gene polymorphism.
abstract: BACKGROUND
  Pheochromocytoma and reninoma represent two rare diseases causing hypertension. We here reported a rare case of association between type 2 multiple endocrine neoplasia related bilateral pheochromocytoma and reninoma. Moreover, polymorphism of ACE gene, which is known to be related to an increase of cardiovascular risk, has been found in the same patient.
  
  
  METHODS
  A 24 year old Caucasian man came to our attention for severe hypertension, resistant to anti-hypertensive polytherapy. At the age of twenty he had undergone total thyroidectomy with lymphadenectomy for medullary carcinoma. Genetic testing showed a RET mutation of codon 918 (exon 16) not documented in other family members. During the follow-up, a progressive increase of urinary metanephrines and catecholamines was recorded. Our evaluation confirmed the presence of severe hypertension (220/140 mmHg) and a severe increase of urinary catecholamines and metanephrines. Due to the presence of hypokalemia, other causes of hypertension were researched leading to the discovery of hyperreninemia (236 μUI/ml) with mild hyperaldosteronism, and a mild increase of the renal artery resistance at ultrasound. An abdominal MRI showed multiple adrenal masses and a right kidney nodular lesion of about 2 cm. The patient underwent bilateral adrenalectomy and right nephrectomy, and histology confirmed the presence of bilateral pheochromocytoma and right reninoma. The post-surgery laboratory evaluation showed a rapid reduction of the urinary metanephrines while plasma renin level remained low in spite of the bilateral adrenalectomy without any mineralocorticoid supplementation. To further investigate these unusual feature, we performed genetic testing for the ACE gene, which revealed the presence of ACE I/D polymorphism.
  
  
  CONCLUSIONS
  This unique report describes the association between two rare causes of hypertension in the same patient. Furthermore, the absence of requirement of mineralocorticoid supplementation in spite of bilateral adrenalectomy, represent an uncommon and interest finding.
authors.affiliation: Endocrinology Unit, Università Cattolica del Sacro Cuore, Largo Agostino Gemelli 8, 00168, Rome, Italy. rosamariaparagliola@gmail.com.
authors.forename: Rosa Maria
authors.initials: RM
authors.lastname: Paragliola
authors.affiliation: Biochemistry and Clinical Biochemistry Unit, Università Cattolica del Sacro Cuore, Rome, Italy. ecapoluongo@rm.unicatt.it.
authors.forename: Ettore
authors.initials: E
authors.lastname: Capoluongo
authors.affiliation: Department of Systems Medicine, Università degli Studi Tor Vergata, Rome, Italy. torino@med.uniroma2.it.
authors.forename: Francesco
authors.initials: F
authors.lastname: Torino
authors.affiliation: Biochemistry and Clinical Biochemistry Unit, Università Cattolica del Sacro Cuore, Rome, Italy. angelo.minucci@virgilio.it.
authors.forename: Angelo
authors.initials: A
authors.lastname: Minucci
authors.affiliation: Biochemistry and Clinical Biochemistry Unit, Università Cattolica del Sacro Cuore, Rome, Italy. giuliacanu@gmail.com.
authors.forename: Giulia
authors.initials: G
authors.lastname: Canu
authors.affiliation: Endocrinology Unit, Università Cattolica del Sacro Cuore, Largo Agostino Gemelli 8, 00168, Rome, Italy. alessandro.prete85@gmail.com.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Prete
authors.affiliation: Endocrinology Unit, Università Cattolica del Sacro Cuore, Largo Agostino Gemelli 8, 00168, Rome, Italy. pontecorvi@rm.unicatt.it.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Pontecorvi
authors.affiliation: Endocrinology Unit, Università Cattolica del Sacro Cuore, Largo Agostino Gemelli 8, 00168, Rome, Italy. corsello.sm@mclink.it.
authors.forename: Salvatore Maria
authors.initials: SM
authors.lastname: Corsello
mesh_terms: D000236:Adenoma / Q000150:complications / Q000235:genetics* / Q000378:metabolism; D000310:Adrenal Gland Neoplasms / Q000150:complications / Q000235:genetics*; D006801:Humans; D006973:Hypertension / Q000209:etiology; D007680:Kidney Neoplasms / Q000150:complications / Q000235:genetics* / Q000378:metabolism; D008297:Male; D018814:Multiple Endocrine Neoplasia Type 2b / Q000235:genetics*; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D010673:Pheochromocytoma / Q000150:complications / Q000235:genetics*; D051096:Proto-Oncogene Proteins c-ret / Q000235:genetics*; D012083:Renin / Q000378:metabolism*; D055815:Young Adult
chemical_list: D051096:Proto-Oncogene Proteins c-ret; C099282:RET protein, human; C488034:ACE protein, human; D007703:Peptidyl-Dipeptidase A; D012083:Renin