Science and Education Publishing American Journal of Medical Case Reports 2374-216X 3 11 2015 10 15 Osteochondritis Dissecans Treated With Autograft Cartilage Transplantation System (Mosaicplasty): MRI Contribution on Patient Follow-up - Case Report 374 376 EN Francisco Abaete Chagas-Neto Francisco Jose Magalhaes Pinto Claudia Fontenele Bruno Elizabeth Maria de Araujo Lucena Tenorio Izabel Rene Leitao Afonsina Pereira de Aquino Marcello Henrique Nogueira-Barbosa AJMCR20153117 10.12691/ajmcr-3-11-7 2015 6 13 2015 9 14 2015 10 13 Articular cartilage injuries may be caused by several mechanisms, including metabolic, genetic, vascular and traumatic events. A single episode of knee trauma or chronic and repetitive mechanical stress overloading the subchondral bone can start the process. The authors report a case of a young male patient with regular exercise routine, diagnosed with osteochondritis dissecans after sudden severe right knee pain. This patient underwent surgical treatment with autograft cartilage transplantation (mosaicplasty). Comparison between initial MRI, one-­�\year and two-­�\year follow-­�\up MRIs was performed. This case report illustrates the importance of the MRI in the evaluation of mosaicplasty treatment for osteochondritis dissecans. We further discuss prognostic factors related to chondral repair and MRI assessment of implant integration.