Kotaro Sekiya DDS, PhD, Presenter: Nothing to Disclose

Hirofumi Kuno MD, Abstract Co-Author: Nothing to Disclose

Satoshi Fujii MD, PhD, Abstract Co-Author: Nothing to Disclose

Takashi Kaneda DDS, PhD, Abstract Co-Author: Nothing to Disclose

Masahiko Kusumoto MD, Abstract Co-Author: Nothing to Disclose

Ryuichi Hayashi MD, PhD, Abstract Co-Author: Nothing to Disclose

Masaaki Suemitsu DDS, PhD, Abstract Co-Author: Nothing to Disclose

Mitsuo Satake MD, PhD, Abstract Co-Author: Nothing to Disclose

In patients with oral cavity carcinoma, preoperative evaluation of the extension of tumors (depth and range) in the mandible is crucial for planning surgical procedures and postoperative treatment. The extension of a tumor into/in the mandible has several patterns, and depends on the following factors:  a. Primary location of the tumor (e.g. gingiva, retromolar trigone)  b. Mandibular subsites for invasion  c. Histological characteristics of the tumor  d. Condition of the mandible (e.g. presence of teeth, dental or periodontal disease)  e. Presence of perineural spread Furthermore, some dental and inflammatory diseases may influence bone marrow imaging of the tumor in the mandible, and may mimic the tumors on CT and MRI. This educational exhibit will show what radiologists need to know for accurately evaluating extension of tumors in the mandible based on clinical significance.

1. Key anatomy of the mandible for evaluating bone marrow invasion 2. Illustrations of various cases of carcinoma invading the mandibular bone marrow  a. How to diagnose invasion to the mandibular bone marrow  b. How to evaluate the extension of the tumor in the mandible based on surgical procedures  c. How to determine when postoperative chemo-radiotherapy is required 3. Summary and classification of extension patterns of tumors

http://abstract.rsna.org/uploads/2014/14007819/14007819_cg32.pdf

Sekiya, K, Kuno, H, Fujii, S, Kaneda, T, Kusumoto, M, Hayashi, R, Suemitsu, M, Satake, M, Extension Patterns of Oral Cavity Carcinoma in the Mandible and Its Clinical Significance.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14007819.html