Early Second-Trimester Spontaneous Miscarriage Due to Fourth Ventricle Choroid Plexus Papilloma

Miscarriage due to fetal tumors is an extremely rare finding, with a varying incidence from 1.7 to 13.5 per 100,000 live births, with central nervous system tumors occupying a minority of these cases. Herein, we report the gross morphological and histological findings of a 17-gestational week spontaneous miscarriage in a 27 year old multi-gravida due to a fourth ventricle choroid plexus papilloma (CPP). The CPP was composed of a pronoun fibro-vascular stroma covered with a dense lining of tall cuboid sparsely ciliated single cell layer with rich in chromatin nuclei. The cytoplasm of the CPP covering cells was intensely colored when compared to the pale cytoplasm of the covering cells of the choroid plexus collected from the lateral ventricle, which also lacked in such pronoun fibrovascular stroma. The fourth ventricle was significantly dilated with parenchymal compression of nervous tissue towards the chondral fetal cranium.