Cantú syndrome with coexisting familial pituitary adenoma.

Abstract:

CONTEXT:Pseudoacromegaly describes conditions with an acromegaly related physical appearance without abnormalities in the growth hormone (GH) axis. Acromegaloid facies, together with hypertrichosis, are typical manifestations of Cantú syndrome. CASE DESCRIPTION:We present a three-generation family with 5 affected members, with marked acromegaloid facies and prominent hypertrichosis, due to a novel missense variant in the ABCC9 gene. The proband, a 2-year-old girl, was referred due to marked hypertrichosis, noticed soon after birth, associated with coarsening of her facial appearance. Her endocrine assessment, including of the GH axis, was normal. The proband's father, paternal aunt, and half-sibling were referred to the Endocrine department for exclusion of acromegaly. Although the GH axis was normal in all, two subjects had clinically non-functioning pituitary macroadenomas, a feature which has not previously been associated with Cantú syndrome. CONCLUSIONS:Activating mutations in the ABCC9 and, less commonly, KCNJ8 genes-representing the two subunits of the ATP-sensitive potassium channel-have been linked with Cantú syndrome. Interestingly, minoxidil, a well-known ATP-sensitive potassium channel agonist, can cause a similar phenotype. There is no clear explanation why activating this channel would lead to acromegaloid features or hypertrichosis. This report raises awareness for this complex condition, especially for adult or pediatric endocrinologists who might see these patients referred for evaluation of acromegaloid features or hirsutism. The link between Cantú syndrome and pituitary adenomas is currently unclear.

journal_name

Endocrine

journal_title

Endocrine

authors

Marques P,Spencer R,Morrison PJ,Carr IM,Dang MN,Bonthron DT,Hunter S,Korbonits M

doi

10.1007/s12020-017-1497-9

subject

Has Abstract

pub_date

2018-03-01 00:00:00

pages

677-684

issue

3

eissn

1355-008X

issn

1559-0100

pii

10.1007/s12020-017-1497-9

journal_volume

59

pub_type

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