Osteochondritis dissecans of the knee represents a complex pathology which is very frequentlydiagnosed late. It is therefore a challenge for the orthopaedic surgeon to avoid such delay in the diagnosis, and toprovide a suitable early treatment for the patient. We present the case of a patient with osteochondritis dissecansof trochlear grove localization, which is characterized by the uncommon location of the pathology (approximately1% according to the series consulted). The patient is a 13-year-old male suffering from pain and repetition spillsin his left knee of more than 2 years of evolution, which doesn’t allow normal sports activity. Even though the literaturerelated to the osteochondritis dissecans of the knee located in the medial femoral condyle is abundant andits treatment and rehabilitation algorithms are clear, they are not for the rest of its much less frequent locations

Osteochondritis dissecans of the knee represents a complex pathology which is very frequentlydiagnosed late. It is therefore a challenge for the orthopaedic surgeon to avoid such delay in the diagnosis, and toprovide a suitable early treatment for the patient. We present the case of a patient with osteochondritis dissecansof trochlear grove localization, which is characterized by the uncommon location of the pathology (approximately1% according to the series consulted). The patient is a 13-year-old male suffering from pain and repetition spillsin his left knee of more than 2 years of evolution, which doesn’t allow normal sports activity. Even though the literaturerelated to the osteochondritis dissecans of the knee located in the medial femoral condyle is abundant andits treatment and rehabilitation algorithms are clear, they are not for the rest of its much less frequent locations