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Intraocular tumours in goldfish

Tumours that develop inside the eye are exceptionally rare in fish although they appear more commonly in black moors (telescope eye goldfish varieties). They cause noticeable enlargement of the eyeball which is easily seen by comparing to the opposite unaffected eye. They are often at an advanced stage when first presented for treatment and ultrasound scanning is the most effective means of diagnosis. Identifying the exact tissue type is challenging and requires specialised staining of histological samples. Enucleation is often unsuccessful, and this may be related to collateral damage to the brain. Click here for a scientific report.

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