" /> Pituitary adenoma 1, multiple types - CISMeF





Preferred Label : Pituitary adenoma 1, multiple types;

Symbol : PITA1;

CISMeF acronym : PAP; PITA1;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Somatotropinoma, familial isolated; Isolated familial somatotropinoma; Somatotrophinoma, familial; Acromegaly due to pituitary adenoma 1; FIS; IFS; PAGH1;

Included titles and symbols : Pituitary adenoma predisposition; Pituitary adenoma, familial isolated; PAP; FIPA;

Description : Pituitary adenomas are benign monoclonal neoplasms of the anterior pituitary gland, accounting for approximately 15% of intracranial tumors. Growth hormone (GH; 139250)-secreting tumors, which clinically result in acromegaly, comprise about 20% of all pituitary tumors and are the second most common hormone-secreting pituitary tumor after prolactin (176760)-secreting tumors (600634), which account for 40 to 45% of pituitary tumors. ACTH-secreting tumors, resulting in Cushing disease (219090), and thyrotropin (TSHB; 188540)-secreting tumors are much less common. Nonsecreting pituitary tumors, which account for about 33%, can cause symptoms due to local compressive effects of tumor growth (Vierimaa et al., 2006; Georgitsi et al., 2007; Horvath and Stratakis, 2008). Acromegaly is characterized by coarse facial features, protruding jaw, and enlarged extremities (Vierimaa et al., 2006). Familial isolated somatotropinoma (FIS) is defined as the occurrence of at least 2 cases of acromegaly or gigantism in a family that does not exhibit features of other endocrine syndromes. FIS patients tend to have onset about 4 to 10 years earlier than patients with sporadic disease (Gadelha et al., 1999; Horvath and Stratakis, 2008). Familial isolated pituitary adenoma (FIPA) and pituitary adenoma predisposition (PAP) are terms referring to families in which 2 or more individuals develop pituitary tumors. Within a family, tumor types can be heterogeneous, with members of the same family having GH-secreting, prolactin-secreting, ACTH-secreting, or nonsecreting adenomas; in contrast, some families are homogeneous with regard to tumor type. Familial isolated somatotropinoma refers specifically to GH-secreting tumors and is usually associated with an acromegaly phenotype. Thus, FIS is a subset of FIPA or PAP (Toledo et al., 2007). Familial acromegaly can also occur in association with multiple endocrine neoplasia type I (MEN1; 131100), Carney complex (CNC1; 160980), and the McCune-Albright syndrome (174800).;

Inheritance : Autosomal dominant; Somatic mutation;

Molecular basis : Caused by mutation in the aryl hydrocarbon receptor-interacting protein gene (AIP, 605555.0001); Caused by somatic mutation in the alpha-stimulatory subunit of the guanine nucleotide-binding protein gene (GNAS1, 139320.0008);

Neoplasia : Pituitary adenoma; Somatotrophinoma; Prolactinoma;

Laboratory abnormalities : Increased serum growth hormone levels; Increased serum IGF1; Increased serum prolactin;

Prefixed ID : #102200;

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12/05/2024


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