Another skin lesion, pyoderma gangrenosum, is typically a painful ulcerating nodule. This localization focuses the radiation exposure on the cancerous lesion. After a peripheral nerve lesion, aberrant regeneration may occur. Dentigerous cyst is potentially capable of becoming an aggressive lesion. The grade of squamous intraepithelial lesion can vary. There are common signs that can highlight the presence of a malignant lesion. Dural ectasia is an example of a spinal cord lesion that may affect continence. Flaccid paralysis can be associated with a lower motor neuron lesion. He named the lesion "erythema migrans". Isolated RA is associated with a visible thalamic lesion. Performance is generally preserved in the side ipsilateral to the lesion (ipsilesional). Diagnosis is typically based on examination with light shining through the lesion being supportive. In one instance transient global amnesia was caused by a hippocampal CA1 lesion. It is one of the characteristic responses of an upper motor neuron lesion. Correlation of common lesion characteristics is made.