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Pars Intermedia Cyst
Case Detail
| Anatomy: Neck-Face |
 Joseph Junewick, MD FACR |
| Diagnostic Category: Genetic or Congenital |
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| Created: over 3 years ago |
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| Updated: over 2 years ago |
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| Tags:
PEDS
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| Modality/Study Types:
MR
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Activities:  PDF  ImageJA |
History
2 year old with seizure.
Case Images
Diagnosis
Pars intermedia cyst (Rathke’s cleft cyst)
Findings
MR – Nonenhancing T1 hypointense and T2 hyperintense focus interposed between the anterior and posterior pituitary.
Discussion
Pars intermedia cysts, also referred to as Rathke’s cleft cysts, are thought to be congenital remnants of Rathke’s pouch. Pars intermedia cysts are common, found in 13-22 % of autopsies but are rarely symptomatic because most are less than 3 mm in diameter. Cysts are lined by goblet epithelial cells and can enlarge and produce headaches, pituitary dysfunction, visual disturbance and hypothalamic symptoms. MR signal varies depending upon the cyst contents; nodules can occur in the cyst wall.
Reference
Byun WM, et al. MR Imaging Findings of Rathke’s Cysts: Significance if Intracystic Nodules. AJNR 2000; 21:485-488.