Unusual Pathology Presentation, Chondroblastic Osteosarcoma of the Right Calcaneal Bone.

Introduction: tumors that form in the bones of the foot are considered an uncommon or unusual finding in the medical setting. In most cases, the tumors are identified incidentally through imaging studies, and are generally classified as benign, meaning that they are not cancerous and do not pose a significant health risk. However, it is important to exercise appropriate caution, as these malignant bone tumors, which can form in the calcaneus, are particularly aggressive in nature and require specialized care. Lesions that are considered malignant tend to manifest themselves with increased frequency and, when they do, are often accompanied by symptoms such as pain and marked swelling in the affected area. Osteosarcoma is the most common primary non-hematopoietic malignant bone tumor in children and adolescents. However, it rarely occurs in the calcaneus and there are only a few case reports in the literature. The aim of the present case report is to learn about the clinical presentation of this unusual clinical and surgical pathology. Case Report: 13-year-old patient presented with mild pain in the right heel for approximately 6 months, which intensified during sports activities. Three hours ago, the patient was playing soccer and the symptomatology was exacerbated. Conclusion: the relevance of a preliminary diagnosis and the early administration of adequate treatment for osteosarcoma in people who experience chronic pain in the heel area is of utmost importance. Furthermore, it underscores the need to consider osteosarcoma as a diagnostic possibility to be considered in adolescents suffering from chronic heel pain, even though this disease is relatively uncommon.