Peripheral nerve sheath tumor
Query right axillary nerve schwannoma
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There is a rounded soft tissue mass within the right axillary region. The mass measures 3.4cm in length, 3.9cm in width and 3.5cm in depth. The mass is located inferomedial to the axillary artery and infero-anterior to the axillary vein. There is mass effect and partial effacement of the axillary vein as it courses around the mass. The mass appears to be contiguous with the brachial plexus branches.
The lesion is well encapsulated and there is no evidence of infiltration through the adjacent fat. The mass demonstrates heterogenous and predominantly high signal on T2, and is isointense to muscles on T1. There is heterogenous enhancement with mixed solid and cystic change following the administration of gadolinium.
These imaging features are most in keeping with a peripheral nerve sheath tumor.
Acquired on a 1.5T Toshiba Titan.