Neoplastic degeneration in Paget's disease is a rare complication (approximately 1% of cases) and, despite the treatment, presents a poor prognosis. The authors report a case of a male, 82-year-old patient with long standing Paget's disease who presented imaging findings of malignant degeneration in the calcaneus histopathologically diagnosed as sarcomatous degeneration.
Paget's disease; Sarcoma; Sarcomatous degeneration; Calcaneus; Osteitis deformans
