"Starts as non-ulcerated swelling with pain. In 2-3 weeks, the necrotic tissue leads to ulcer(s). The condition is usually self-limiting and shows complete remission subsequently without treatment within 6 to 10 weeks."
"T1: hypointense"
"T2: hyperintense"
"T1 C+: thin peripheral enhancement"
"Five histological stages have been described: infarction, sequestration, ulceration, reparation and healing."