Traumatic neuromas are an uncommon biopsy submission. They are exuberant, haphazardly growing masses, but are not malignant. They occur following transection of the nerve followed by poor apposition of the two cut ends leading to haphazard growth. In this case, traumatic transection of a nerve by the porcupine quill is considered most likely. In the dog, neuromas are most commonly seen as a consequence of tail docking. Clinically, they are often painful and affected dogs will often be irritated by the mass and scratch at it.