Grossly, the amniotic side of the fetal membranes and placental disk is inspected for any greenish discoloration, which indicates the presence of mecinoum.
When the presence of meconium is suspected from clinical history and/or the gross exam, look for the following histopathologic signs of it:
The pigment-laden macrophages are presumably meconium-laden "meconiophages", the pathologic diagnosis can be termed "meconium histocytosis"
- Weida, Jennifer N.; Schubert, Frank P.; Pastrick, Meredith A.; Patil, Avinash S. (2015). "Comprehensive Review of the Stillborn Placenta ". Journal of Midwifery & Women's Health 60 (4): 380–389. doi:10.1111/jmwh.12338. ISSN 15269523.
- Mandolin S. Ziadie. Placenta - Nonneoplastic placental conditions and abnormalities - Noninfectious - Meconium staining. Pathology Outlines. Topic Completed: 1 October 2011. Minor changes: 27 August 2020