Differentials, in this case, would include:
- neurogenic tumours
- nerve sheath tumours (e.g. schwannoma and neurofibroma)
- parasymphathetic ganglion tumours
- sympathetic chain tumours (e.g. neuroblastoma, ganglioneuroblastoma, ganglioneuroma)
- lymphoma
- metastasis
- extramedullary haematopoiesis