Incidence of this lesion has been reported about 5% [1,2] but other series have reported higher incidence (17%).
Dihlmann W and Delling G  and Cawley et al.  have attempted a classification into inflammatory and non-inflammatory types. Cawley  also describes the topography of lesion according to whether the lesion was localized or extensive. Localized lesions occurred either at the rim of the vertebra or in a small circumscribed area of end plate while extensive lesions involved both areas and spread across the whole disc margin. Lesion in spines with advanced ossification might be prorogued by minor trauma however there are some cases were traumatic antecedent has not be proven
Villanueva C (2014) Andersson Type III Lesion Treated by Double Approach. J Trauma Treat