Fine needle aspiration of the orbit

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Abstract
Cytological findings of 112 fine needle aspirations (FNA) are described. No false-positive diagnoses occurred. The false-negative rate was 5% (suspicious reports not included) or 13% (suspicious reports included). In doubtful cases immune- and enzyme-cytochemical findings are able to support substantial diagnostic information. FN A cytology, using a 23 gauge needle, is a safe and simple method, provided that the aspirations are carried out in a technically appropriate way and examined by an experienced cytologist. In non-palpable lesions the CT scan is invaluable inguiding the exact route of the needle. In principle, each orbital lesion of unknown etiology may be considered a target for FNA.

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