- Rare tumor, most commonly benign with good prognosis after surgical resection
- Clinical presentations: pain, paresthesia, palpable mass
- Common pathology: schwannoma, neurofibroma. Other possibilities: malignant peripheral nerve sheath tumor (MPNST), desmoid, ganglion, epidermoid
- MRI is the study of choice to delineate the margins of tumor from surrounding tissues
- Characteristic feature on any imaging techniques is close relationship with the parent nerve, which helps to exclude other possibilities such as lymphadenopathy, vascular anomalies, etc.
- Low signal on T1, high signal on T2 and heterogeneous enhancement
- MRI cannot differentiate schwannoma from neurofibroma
1. Binder DK, Smith JS, Barbaro NM. Primary brachial plexus tumors: imaging, surgical, and pathological findings in 25 patients. Neurosurg Focus 2004;16.
2. Rettenbacher T, Sogner P, Springer P, et al. Schwannoma of the brachial plexus: cross-sectional imaging diagnosis using CT, sonography, and MR imaging. Eur Radiol 2003;13:1872-1875.