Association Between Incomplete Partition Type III and Abnormal Hypothalamic Morphology: Further Imaging Evidence.


ÖZTUNALI Ç. , ŞAYLISOY S. , Toprak U. , Incesulu A.

Journal of computer assisted tomography, vol.44, no.5, pp.704-707, 2020 (Journal Indexed in SCI Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 5
  • Publication Date: 2020
  • Doi Number: 10.1097/rct.0000000000001050
  • Title of Journal : Journal of computer assisted tomography
  • Page Numbers: pp.704-707
  • Keywords: hypothalamus, incomplete partition III, magnetic resonance imaging, X-linked congenital progressive mixed deafness syndrome, X-LINKED DEAFNESS

Abstract

Purpose Incomplete partition III (IP-III), characterized by congenital mixed or sensorineural hearing loss, is a rare genetic disease transmitted through X-linked mode of inheritance. Inner ear findings of IP-III have been well described and allow an immediate diagnosis to be made. Recently, an association between IP-III and distinct hypothalamic malformations has been reported in some of the patients with IP-III. The purpose of this study was to investigate the morphologic abnormalities of the hypothalamus in IP-III. Materials and Methods Magnetic resonance imaging studies of 8 subjects, including 1 set of brothers, who were diagnosed with IP-III based on their clinical and inner ear imaging findings, were analyzed. Results Of the 8 subjects, 7 demonstrated some degree of morphologic abnormality of the hypothalamus. Of these, 2 showed asymmetrical thickening, 1 showed symmetrical thickening, and 4 showed mass-like enlargement of the hypothalamus. Six of 7 subjects with hypothalamic abnormalities showed asymmetry in caudal extension of the abnormalities, which was more discernible on coronal oblique T2-weighted images. Clinically, none of the subjects had endocrinologic or neurologic symptoms. Conclusions This retrospective analysis presents further magnetic resonance imaging evidence on the association between the rare IP-III malformations and the presence of hypothalamic morphologic abnormalities.