PAROSTEAL OSTEOSARCOMA OF THE MAXILLA: A case report and review of the literature

Parosteal osteosarcoma of the maxilla

Abstract

OBJECTIVE: A report of a rare case of parosteal osteosarcoma, a 
low-grade malignant lesion diagnosed in our Centre, and to 
highlight the diagnostic challenges, treatment considerations and 
prognosis of the lesion; compared to other reactive, benign and 
malignant jaw lesions. 
CASE REPORT: A 67 years old female who presented with a slow 
growing oval shaped, well circumscribed, bony hard, left maxillary 
swelling of 4 months duration; extending from the region of the left 
upper lateral incisor tooth (22) to the left upper first molar tooth 
(26) and fixed to the overlying gingiva. Oblique lateral radiograph 
showed the left maxillary labial alveolus with lobulated ossified 
mass. The clinical differential diagnoses of the lesion were osteoma 
and fibrous dysplasia. Histopathological diagnosis of parosteal 
osteosarcoma was made after incisional biopsy of the lesion. 
Surgical resection (with wide margin) of the affected maxillary 
segment and the associated teeth was performed and post-surgical 
biopsy confirmed the diagnosis of parosteal osteosarcoma. No 
recurrence was observed after 4 years follow up of the patient. 

CONCLUSION: Parosteal osteosarcoma shares similar clinico
pathological characteristics with some periosteal lesions. However, 
special imaging techniques and histopathological evaluation 
remains the most reliable tools for definitive diagnosis of these 
lesions. This study recommends close cooperation between Oral 
and Maxillofacial Surgeons, Pathologists and Radiologists in the 
management of parosteal osteosarcoma.