megasigmoid

mac·ro·sig·moid

(mak'rō-sig'moyd),
Enlargement or dilation of the sigmoid colon.
Synonym(s): megasigmoid
Farlex Partner Medical Dictionary © Farlex 2012

megasigmoid

A term of waning use for toxic megacolon involving the sigmoid colon.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
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It appears that these patients had idiopathic megasigmoid, he said.