where is and what is the lesion?

Comment

Comment by mohamad mirchi on September 1, 2009 at 12:54pm

well done!thanks for your complete explanation,dear wael.the other DDx. can be cholesteatoma.

Comment by Wael Nemattalla on September 1, 2009 at 8:40am

Glomus tympanicum tumor.
Mass is lying in direct apposition to the promontory.
The most common mass in hypotympanum of middle ear cavity.
Syn. paraganglioma, chemodectoma.
Glomus jagulare may erode bone making differential difficult.
Role of 5 for paraganglioma:
5% distant metastasis.
5% active with para-neoplastic syndrome.
Highly vascular. Salt and pepper on T2 WI.
Can be multifocal with other lesions in the body.