polyserositis

[pŏl′ē-sîr′ō-sītĭs]
n.
  1. Chronic inflammation of several serous membranes with effusions in serous cavities resulting in fibrous thickening of the serosa and constrictive pericarditis.Concato's disease
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.