TY - JOUR T1 - Perfusion MR Imaging of an Intracranial Collision Tumor Confirmed by Image-Guided Biopsy JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 94 LP - 97 VL - 27 IS - 1 AU - P. Jun AU - J. Garcia AU - T. Tihan AU - M.W. McDermott AU - S. Cha Y1 - 2006/01/01 UR - http://www.ajnr.org/content/27/1/94.abstract N2 - SUMMARY: We present a patient with a new intracranial mass lesion that was initially interpreted as a metastasis on conventional anatomic MR imaging. On dynamic, contrast-enhanced, susceptibility-weighted perfusion MR imaging, however, there were regional hemodynamic differences within the lesion. Image-guided open biopsy targeting these regions uncovered a collision tumor between a typical meningioma and a metastatic breast carcinoma. In cases where conventional anatomic MR imaging is ambiguous, physiology-based neuroimaging methods provide complementary physiologic information useful for discriminating between histologically unique tissue types. ER -