Left sided mass.
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A well circumscribed mass demonstrates high T2 and low T1 signal.
The patient went on to have this mass excised.
The tumor is a peripheral nerve sheath tumor. Most areas are most consistent with a schwannoma. However, in view of the presence of areas with a histologic appearance reminiscent of neurofibroma and the occurrence of rare axons within the lesion, a co-existing neurofibroma component cannot be excluded.