Kraske's operation

[krăskēz, kräskəz]
n.
  1. Removal of the coccyx and excision of the left wing of the sacrum to afford approach for resection of the rectum in cases of cancer or stenosis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.