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Otitis media with effusion
Otitis media characterized by thick or sticky fluid behind the tympanic membrane. [from HPO]
Atypical choroid plexus papilloma
A very rare type of choroid plexus tumour that in contrast to papilloma of the choroid plexus has an increased likelihood of progression to carcinoma and of recurrence. The disease displays brisk mitoses, nuclear pleomorphism, raised cellular density, obscurity of the papillary growth pattern and cell necrosis. [from SNOMEDCT_US]
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