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CT and MRI findings after stereotactic resection of brain lesions.

Abstract：

OBJECTIVE:To describe postoperative CT and MRI findings and their time course in uncomplicated cases after stereotactic volumetric resections of brain lesions. MATERIALS AND METHODS:One-hundred twenty-eight imaging studies (CT, 86; MRI, 42), performed 6 h to 2 years after 52 stereotactic operations, were retrospectively reviewed and analyzed in relation to time of surgery in cases without complications. RESULTS:The extent of resection bed did not change during the first week after operation; reduction of size then began and continued up to 3-6 months. Mass effect and edema showed no changed during the first 4 days, then later regressed gradually. Pneumocephalus was found in 58% of cases in the first 3 weeks, but never later. Benign, surgically-induced enhancement appeared at the margins of encephalotomy and retractor at the end of the first postoperative week, became more prominent during the following weeks, and lasted up to 3-5 months. In the majority of cases enhancement prevented recognition of the residual tumor. Dural enhancement was observed at the craniotomy site very early after the operation and persisted up to 1 year. Meningeal enhancement over convexities was found in 44% of MRI studies. CONCLUSION:Extent of the resection bed, mass effect, edema, and pneumocephalus show, in uncomplicated cases, a regular regression during the postoperative period. The time course of enhancement is complex and can be a source of diagnostic misinterpretation.

journal_name

Eur J Radiol

journal_title

European journal of radiology

authors

Herman M,Pozzi-Mucelli RS,Skrap M

doi

10.1016/s0720-048x(96)00774-7

subject

Has Abstract

pub_date

1996-11-01 00:00:00

pages

228-34

issue

3

eissn

0720-048X

issn

1872-7727

pii

S0720048X96007747

journal_volume

23

pub_type

杂志文章

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