Tumor recurrence criteria for postoperative contrast-enhanced computed tomography after surgical treatment of oral cancer and flap repair

Toru Chikui, Kenji Yuasa, Masafumi Inagaki, Masamichi Ohishi, Kanemitsu Shirasuna, Shigenobu Kanda

Research output: Contribution to journalArticle

6 Citations (Scopus)


Objective. To characterize the computed tomography (CT) findings that distinguish cancer recurrence from postoperative changes that mimic such recurrence. Study design. We evaluated a total of 72 CT scans from 32 patients who had undergone surgery with either pectoralis major myocutaneous flap or forearm flap. The observers evaluated the presence and pattern of enhancement, the presence of low density areas, and changes in the adipose tissue of the flap. Results. A persistent zone of high attenuation over 6 months suggested the high possibility of recurrence. However, an enhancement within 6 months occurred both with the recurrent tumor and with postoperative tissue. In the patients with recurrence (n = 12), the enhanced areas were focal (n = 8) or diffuse (n = 4). Focal-type recurrence often occurred at the posterior margin. The presence of low-density areas and changes in the adipose tissue in the flap are also helpful for detecting recurrence. Conclusions. The combination of several features seen on CT images can be useful in differentiating tumor recurrence from postoperative tissue changes. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000;90:369-76).

Original languageEnglish
Article number42280
Pages (from-to)369-376
Number of pages8
JournalOral surgery, oral medicine, oral pathology, oral radiology, and endodontics
Issue number3
Publication statusPublished - Jan 1 2000
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology
  • Dentistry(all)

Cite this