Abstract
Peripheral nerve sheath tumors are categorized into benign and malignant forms, comprising
of neurofibroma and schwannoma in the benign category and malignant peripheral nerve
sheath tumors in the malignant category. Magnetic resonance imaging plays an important
role in the diagnosis of these lesions. The various imaging features and signs that
help to identify and characterize a nerve sheath tumor are, distribution of the tumor
along a major nerve, an entering or exiting nerve sign, target sign, a fascicular
sign and a split-fat sign.
Keywords
Magnetic resonance imaging - neurofibroma - schwannoma - target sign
