title: Measuring the tumor volume of gastric carcinoma by computer image analysis: clinical significance.
abstract: The tumor diameter of gastric carcinoma, measured by gross or histologic examination, is a rough indicator of actual tumor size. Therefore we investigated the utility of three-dimensional reconstruction of tumors in gastric carcinoma. Altogether 105 primary gastric carcinoma lesions, consisting of 16 advanced and 89 early carcinomas, were analyzed. A total of 942 lesion tissue sections, comprising 2 to 37 sections per lesion (mean 9 sections), were examined histologically. Surface rendering using a computer graphics analysis program was then performed from serial sections to create a three-dimensional reconstruction of tumor morphology from which to measure tumor volume. For the 105 lesions the tumor diameter ranged between 4 and 106 mm (average +/- SE: 32.4 +/- 2.0 mm), and tumor volume ranged between 4 and 5853 mm3 (average +/- SE: 773.0 +/- 104.6 mm3). A significant correlation was found between tumor diameter and the log of the tumor volume (r = 0.733, p < 0.0001). Although the logs of tumor volume for advanced carcinomas were all > 2.5, in 11 of these 16 patients (66%) the tumor diameter was < 4 cm, and in one patient < 2 cm. In addition, tumor diameter did not differ significantly between the 16 advanced and the 89 early gastric carcinomas (p = 0.114), whereas the log of the tumor volume did (p < 0.0001). In conclusion, conventional measurements of tumor diameter as a rough indicator of tumor size can predict the actual tumor size of a gastric carcinoma. Three-dimensional reconstruction using computer graphics provides a better estimation of true tumor size and extent of progression than tumor diameter.
authors.affiliation: Department of Surgery, School of Medicine, Kitasato University, Sagamihara-shi, Kanagawa, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Kikuchi
authors.forename: Y
authors.initials: Y
authors.lastname: Hiki
authors.forename: Y
authors.initials: Y
authors.lastname: Sakakibara
authors.forename: A
authors.initials: A
authors.lastname: Kakita
authors.forename: S
authors.initials: S
authors.lastname: Kuwao
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003936:Diagnosis, Computer-Assisted; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000473:pathology*