Carney complex (CNC) is a rare autosomal dominantly inherited syndrome with near-to-complete penetrance characterized by multiple endocrine and nonendocrine neoplasia. Morbidities are mainly associated with cardiac myxoma and hormonal overactivity. Although genetically heterogeneous, most CNC cases are a consequence of germline inactivating mutations in the gene encoding the cAMP-dependent protein kinase A type I-alpha regulatory subunit (PRKAR1A). Here, we present the case of a patient with Cushing’s syndrome due to primary pigmented nodular adrenocortical disease (PPNAD) and an asymptomatic IGF-1 and GH excess, with a positive family history for adrenal cortisol-secreting adenoma. DNA mutation analysis revealed a heterozygous splice site mutation in PRKAR1A with possible deleterious effects on protein function. After medical treatment with steroidogenesis inhibitors, left monolateral laparoscopic adrenalectomy was performed, achieving a recovery of cortisol-related signs and symptoms. After substitutive glucocorticoid discontinuation, the pituitary-adrenal function was consistent with autonomous cortisol secretion without overt hypercortisolism. Treatment with somatostatin analogues was efficacious in normalizing IGF-1 levels.

Carney Complex in clinical practice

Filippo Ceccato;Gianluca Occhi
2020

Abstract

Carney complex (CNC) is a rare autosomal dominantly inherited syndrome with near-to-complete penetrance characterized by multiple endocrine and nonendocrine neoplasia. Morbidities are mainly associated with cardiac myxoma and hormonal overactivity. Although genetically heterogeneous, most CNC cases are a consequence of germline inactivating mutations in the gene encoding the cAMP-dependent protein kinase A type I-alpha regulatory subunit (PRKAR1A). Here, we present the case of a patient with Cushing’s syndrome due to primary pigmented nodular adrenocortical disease (PPNAD) and an asymptomatic IGF-1 and GH excess, with a positive family history for adrenal cortisol-secreting adenoma. DNA mutation analysis revealed a heterozygous splice site mutation in PRKAR1A with possible deleterious effects on protein function. After medical treatment with steroidogenesis inhibitors, left monolateral laparoscopic adrenalectomy was performed, achieving a recovery of cortisol-related signs and symptoms. After substitutive glucocorticoid discontinuation, the pituitary-adrenal function was consistent with autonomous cortisol secretion without overt hypercortisolism. Treatment with somatostatin analogues was efficacious in normalizing IGF-1 levels.
2020
Polyendocrine Disorders and Endocrine Neoplastic Syndromes
978-3-319-73082-0
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3392111
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