Other Perisellar Tumors

a Skull base metastasis b Chordoma of the clivus a Skull base metastasis b Chordoma of the clivus

Clivus Metastasis
c Epidermoid
Thin Clivus

Fig. 11.34a This metastasis from breast cancer is located just anterior to the pituitary. Differentiation from a primary pituitary adenoma is impossible on the basis of imaging alone. Clinical findings and the patient history need to be considered. b The clivus just posterior to the sella is expanded and surrounded by a sleeve of strongly enhancing soft tissue. This is

Fig. 11.34a This metastasis from breast cancer is located just anterior to the pituitary. Differentiation from a primary pituitary adenoma is impossible on the basis of imaging alone. Clinical findings and the patient history need to be considered. b The clivus just posterior to the sella is expanded and surrounded by a sleeve of strongly enhancing soft tissue. This is a typical chordoma of the clivus. c The cystic epidermoid contains fluid rich in cholesterol that has signal characteristics of CSF on T2-weighted (right) and T1-weighted (left) MR images. This epidermoid has completely obliterated the third ventricle and impinges on the pituitary from a posterior superior direction.

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