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Structural Abnormalities in Congenital Growth Hormone Deficiency

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Growth Hormone Related Diseases and Therapy

Part of the book series: Contemporary Endocrinology ((COE))

Abstract

Until the advent of magnetic resonance imaging (MRI), only small advances were made in the field of pituitary imaging. MRI, however, led to an enormous increase in our detailed knowledge of pituitary morphology, thus improving the differential diagnosis of hypopituitarism. Indeed, MRI represents the examination method of choice for evaluating hypothalamic-pituitary-related endocrine diseases thanks to its ability to provide strongly contrasted high-resolution multiplanar and spatial images. Specifically, MRI allows for a detailed and precise anatomical study of the pituitary gland by differentiating between the anterior and posterior pituitary lobes. The MRI identification of pituitary hyperintensity in the posterior part of the sella, now considered a marker of neurohypophyseal functional integrity, has been the most striking finding for the diagnosis and understanding of some forms of “idiopathic” and permanent growth hormone deficiency (GHD). Published data show a number of correlations between pituitary abnormalities as observed on MRI and a patient’s endocrine profile. Indeed, several trends have emerged and have been confirmed: (1) normal MRI or anterior pituitary hypoplasia generally indicates isolated GHD which is transient and not confirmed after adult height achievement; (2) patients with MPHD seldom show a normal pituitary gland; (3) the classic triad of ectopic posterior pituitary gland, pituitary stalk hypoplasia/agenesis, and anterior pituitary gland hypoplasia is more frequently reported in MPHD patients and is generally associated with permanent GHD. Pituitary abnormalities have been reported in patients with GHD carrying mutations in several genes encoding transcription factors such as POU1F1, PROP1, HESX1, LHX3, LHX4, GLI2, PITX1, PITX2, SOX3, SOX2, and OTX2. Establishing endocrine and MRI phenotypes is extremely helpful in the selection and management of patients with hypopituitarism, both in terms of possible genetic counseling, as well as that of early diagnosis of evolving anterior pituitary hormone deficiencies.

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  1. Department of Pediatrics, IRCCS, Giannina Gaslini – University of Genova, Genova, Italy

    Andrea Secco & Natascia Di Iorgi

  2. Department of Pediatrics, IRCCS, Giannina Gaslini – University of Genova, Largo Gerolamo Gaslini 5, 16147, Genova, Italy

    Mohamad Maghnie

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    Ken Ho

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Secco, A., Di Iorgi, N., Maghnie, M. (2011). Structural Abnormalities in Congenital Growth Hormone Deficiency. In: Ho, K. (eds) Growth Hormone Related Diseases and Therapy. Contemporary Endocrinology. Humana Press. https://doi.org/10.1007/978-1-60761-317-6_6

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