Clival Epidermoid-MRI
38 yr old male with headache has a restricted
diffusion, expansile , possibly extraaxial lesion within clivus in basisphenoid
and basiocciput region, showing pressure erosions and scalloping with cavernous
ICAs compression, no bleed or MR demonstrable calcification-possibly
epidermoid.
Teaching points by Dr MGK Murthy, Abdul Hamid and
Venkat
- Usually less than1%of intracranial tumours. Common in posterior fossa at CP angles and usually large and intradural, Extradural less common. Non restricted diffusion varieties not known
- Differentials include arachnoid cyst(not restricted on DW, cholesteatoma (petrous apex may be involved), cysts of of various varieties including infectious type etc
- Have outer capsule comprised of connective tissue, which surrounds a layer of keratinized stratified squamous epithelium
- Classically benign and slow growing , though occasional malignant transformation at CP angles described
- Removal of capsule to perform complete excision difficult in about 20 to 50% cases due to adhesions to nerves, pia & vessels.
Clival Epidermoid-MRI
Reviewed by Sumer Sethi
on
Wednesday, June 05, 2013
Rating:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUmda10XlBg0BfyMeGgiZAQhZ8Pcbnge_OJBnCozWNq7Uthl-jGtTFihtfZMTiR2fGb7lKHy7BV5Q1itgMx_PZpLTLK1Pa9wZCnqwu1gFkcvpnHidUCWaGAtlai0UKK81AQUM14w/s72-c/clivus+is+it+cholesteatoma1.jpg)
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