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Ependymoma
Joseph Junewick, MD FACR
over 7 years ago
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ARSt Case Repository

Pars Intermedia Cyst

Case Detail

Anatomy: Neck-Face
Junewick
Joseph Junewick, MD FACR
Diagnostic Category: Genetic or Congenital
Created: over 8 years ago
Updated: over 8 years ago
Tags: PEDS
Modality/Study Types: MR
Activities:
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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.



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