Patterns of mandibular invasion by gingival squamous cell carcinoma.

Abstract

PURPOSE:

This study examined patterns of invasion of lower gingiva cancer into the mandible. Our goal was to clarify the most common routes for gingival squamous cell carcinoma to enter and spread within the mandible.

PATIENTS AND METHODS:

The subjects were 176 patients with lower gingival squamous cell carcinoma who underwent mandibulectomy; all tumors were examined histopathologically. The method of mandibulectomy was decided on the basis of conventional plain radiographic and computed tomographic findings.

RESULTS:

The tumor extended to the periosteum in 33%, to the cortical bone in 23%, and to the bone marrow in 9% of the patients who underwent mandibular resection. The remaining 35% of our patients had no evidence of mandibular invasion.

CONCLUSION:

The area of bone resorption on preoperative clinical and radiographic examinations often disagreed with the extent of mandibular invasion on histopathologic examination.

• Authors: Takeshi Nomura, Takahiko Shibahara, Nian-Hui Cui, Hiroyasu Noma
• Journal: Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons (J Oral Maxillofac Surg) Vol. 63 Issue 10 Pg. 1489-93 (Oct 2005) ISSN: 0278-2391 [Print] United States
• PMID: 16182917 (Publication Type: Journal Article)

Topics

• Adult
• Aged
• Aged, 80 and over
• Bone Resorption (diagnostic imaging, etiology)
• Carcinoma, Squamous Cell (pathology, surgery)
• Female
• Gingival Neoplasms (pathology, surgery)
• Humans
• Male
• Mandible (surgery)
• Mandibular Neoplasms (diagnostic imaging, pathology, surgery)
• Middle Aged
• Neoplasm Invasiveness
• Neoplasm Recurrence, Local
• Neoplasm Staging
• Oral Surgical Procedures (methods)
• Radiography