Metastatic Tumours and Tumours from Neighbouring Sites

A wide variety of tumours can invade the orbit and produce proptosis and often diplopia. Lymphoma is one example. It can present as an isolated lesion or in association with Hodgkin's disease or leukaemia. Examples of local spread from adjacent structures include carcinoma of the nasopharynx, carcinoma of the lacrimal gland and meningioma. In children, orbital metastases arise most commonly from neuro-blastoma and Ewing's sarcoma. In the adult, the commonest primary sites are bronchus, breast, prostate and kidneys.

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