Mature teratoma is not a cytological diagnosis. The presence of an immature or malignant component in a tumour cannot be ruled out through FNA.
Mature tumours in children are mostly cystic (dermoid cyst)
Bilateral in 15%
Representation of the different constituents (epithelial or mesenchymatous)
Presence of immature tissues (blastemal, cartilage, etc.)
Presence of malignant cells
Stains correspond to the tissues present
Modern diagnostic techniques
With all the tissues and tumours that may be present in mature, immature and/or malignant teratoma
Tumours that arise from a germ cell after first meiotic division
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