Meconium pleuritis: cytologic diagnosis in a neonate with perforated sigmoid colon and diaphragmatic hernia.

Meconium pleuritis developed in a neonate with a perforation of the sigmoid colon, through a diaphragmatic defect. The meconium released in the abdomen communicated with the right pleural space. The association of these defects is unusual, and the cytologic diagnosis of meconium pleuritis has not been previously reported.