Primary osteosarcoma of the parietal bone.

Area of Science:

• Oncology
• Orthopedic Surgery
• Pathology

Background:

• Osteosarcoma, the most common primary bone tumor, typically affects long bones.
• Skull osteosarcoma represents a rare but significant clinical entity.

Observation:

• A 29-year-old man presented with a growing skull mass after a skateboarding fall, initially suspected as a hematoma.
• During surgery for presumed hematoma, a suspicious mass was discovered and biopsied.

Findings:

• Histopathological evaluation confirmed high-grade osteosarcoma of the skull.
• The patient underwent surgical resection and adjuvant chemotherapy, complicated by wound infection.

Implications:

• This case underscores the importance of considering skull osteosarcoma in patients with skull masses, irrespective of head trauma history.
• Early suspicion and diagnostic workup are crucial for timely intervention in rare osteosarcoma presentations.