Giant Cell Tumor of the Patella: A Case Report.

Giant cell tumors (GCT) are uncommon as primary tumors localized within the patella. This is a case report of a 25-year-old male who developed a GCT in his patella. The patient had intermittent right anterior knee discomfort for a year before presentation. The radiological features pointed to a benign illness. The GCT of the bone was the intraoperative pathological diagnosis. Radiation curettage and adjuvant therapy consisting of phenol and ethanol injections and calcium phosphate cement were used to treat the lesion. Histologically, the tumor comprised several large osteoclastic cells mixed in with spherical- or spindle-shaped mononuclear cells. Sixteen months following surgery, the patient had no symptoms and no signs of distant metastasis or local recurrence. In particular, in young individuals, patellar GCTs may be included in the differential diagnosis of anterior knee discomfort and/or edema despite their rarity.