Chondroblastoma of the occipital bone with aneurysmal bone cyst: A rare case report.

Background: Chondroblastoma is a rare, benign bone tumor originating from immature chondrocytes, typically found in the epiphyseal plates of long bones. Its occurrence in the skull, particularly the occipital bone, is extremely rare.

Case presentation: We report a 10-year-old girl presenting with paroxysmal dizziness, occipital pain, and a palpable mass. Imaging studies revealed an osteolytic lesion in the occipital bone with a multiloculated appearance, indicating a concomitant aneurysmal bone cyst. The patient underwent craniotomy with complete tumor excision. Postoperative follow-up showed no neurological deficits or complications and MRI confirmed no recurrence.

Conclusion: This case highlights the rare presentation of occipital bone chondroblastoma and emphasizes the importance of early surgical intervention for positive outcomes in pediatric patients.