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Table 3 Perioperative staging and assessment of residual tumor

From: Current practices of cytoreductive surgery and hyperthermic intraperitoneal chemotherapy in the treatment of peritoneal surface malignancies: an international survey of oncologic surgeons

During operation, how to measure the extent of peritoneal invasion? N (%)
 Sugarbaker’s staging 20 (59)
 Own peritoneal carcinomatosis index 7 (21)
 Expressing location and size of intra-abdominal tumor using descriptive method 2 (6)
 Keeping pictures of each parts of abdomen 3 (9)
 Others  
How to measure the size of residual tumor that spreads in a miliary shape but sticks together (conglomerate)? N (%)
 Measure the size of whole clustered group as one tumor 21 (62)
 Measure the size of each small miliary-shaped tumor 9 (26)
 Others 2 (6)
How to assess residual tumor?
 Measure the longest section of the residual tumor with naked eyes 28 (82)
 Measure the shortest section of the residual tumor with naked eyes 1 (3)
 Measure the longest section of the residual tumor with ruler 2 (6)
 Measure the shortest section of the residual tumor with ruler 0
 Measure the residual tumor with a ruler after taking an image 1 (3)
Others
After performing not en bloc resection but electrocauterization in the area of miliary tumor spread, how do you assess residual tumor? N (%)
 If the residual tumor is not seen, define it as R0 16 (47)
 If the residual tumor is not seen but there is leftover, define it as R1 13 (38)
 Others 3 (9)