The ectopic posterior pituitary gland.
نویسندگان
چکیده
An ectopic posterior pituitary gland is a rare condition and may present with an empty pituitary fossa, hypoplasia or absence of the infundibular stalk and resultant short stature due to growth hormone deficiency. The location of the ectopic lobe can vary, but it is most commonly situated along the median eminence in the floor of the third ventricle. We report a case of an ectopic posterior pituitary gland, describe the causes and discuss the diagnostic imaging features.
منابع مشابه
Ectopia of the posterior pituitary gland as a normal variant: assessment with MR imaging.
Ectopia of the posterior lobe of the pituitary gland as demonstrated by MR imaging has been described previously in patients with pituitary dwarfism [1 ], transection of the pituitary infundibulum [2], and compression or destruction of the posterior lobe of the pituitary [3]. We report two patients in whom MR imaging revealed ectopic posterior pituitary glands, even though both patients had nor...
متن کاملMR imaging of pituitary dwarfism.
The purpose of this study was to determine whether the MR findings of idiopathic pituitary dwarfism correlated with a clinical history of perinatal abnormalities and abnormal levels of pituitary hormones. MR examinations of 18 patients with pituitary dwarfism were performed; these patients were divided into two groups: those with ectopic posterior lobes (group 1) and those with normal posterior...
متن کاملPosterior pituitary ectopia: an MR feature of pituitary dwarfism.
Using high-field-strength, 1.5-T, high-resolution MR, we identified the following complex of neurohypophyseal abnormalities in each of five pituitary dwarfs: (1) severe hypoplasia or total absence of the infundibulum; (2) absence of the posterior pituitary bright spot in its normal location; and (3) a 3-8-mm tissue nodule at the median eminence exhibiting lipidlike signal on T1-weighted images....
متن کاملEctopia of the posterior pituitary gland or lipoma?
I read , with great interest, the article [1] by Benshoff and Katz , "Ectopia of the Posterior Pituitary Gland as a Normal Variant: Assessment with MR Imaging," that appeared in the July/August 1990 issue of the AJNR. I am writing because of my concern about the confusion that this article may create. It is my opinion that the ectopic posterior pituitary gland does not occur as a normal variant...
متن کاملConsidering the Ectopic Pituitary Gland in Evaluation of the Nasopharyngeal Mass.
IMPORTANCE Extracranial pituitary ectopia is an uncommon finding characterized by all or a portion of the pituitary gland situated in an aberrant location. Often these lesions come to clinical attention only once they begin to function abnormally or increase in size significantly. OBSERVATIONS We describe an incidentally noted, asymptomatic pedunculated nasopharyngeal lesion in a 13-month-old...
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ورودعنوان ژورنال:
- South African journal of surgery. Suid-Afrikaanse tydskrif vir chirurgie
دوره 51 4 شماره
صفحات -
تاریخ انتشار 2013