Abstract

The cytopathologic features of choroid plexus papilloma observed in a one year-old male child are reported and compared with other paediatric central nervous system neoplasms. The cytologic features of choroid plexus papilloma are similar to those of normal choroid plexus and may be difficult to distinguish from those of a well differentiated papillary ependymoma and other tumours with papillae formation. However, the salient cytologic features of choroid plexus papilloma include well defined papillary clusters, monolayered sheets and isolated scattered tumour cells, comprising of cuboidal cells with uniform round or oval nuclei, evenly dispersed chromatin and moderate amount of cytoplasm. The utility of crush cytology in the rapid diagnosis of central nervous system tumours along with the differential diagnoses are highlighted in this report.

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