Low Field Magnetic Resonance Imaging Characteristics of Cranial Vault Meningiomas in 13 Dogs

Meningiomas are common intracranial masses in the dog, and surgical or radiation treatment of meningiomas depends on accurate identification and location. In this review of 13 patients with confirmed meningioma, low field magnetic resonance imaging characteristics of cranial vault meningiomas included increased signal intensity on T2‐weighted images, decreased signal intensity on T1‐weighted images, and marked contrast enhancement that was usually nonhomogeneous and well‐defined. Mass effect and edema were usually present. Cyst formation and meningeal enhancement were also found in some patients. Low field magnetic resonance imaging characteristics of the meningiomas in these patients were similar to those magnetic resonance imaging findings reported in humans and the few reports pertaining to animals.