RT Journal Article SR Electronic T1 Fine needle aspiration biopsy in orbital tumours. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 491 OP 492 DO 10.1136/bjo.75.8.491 VO 75 IS 8 A1 J W Tijl A1 L Koornneef YR 1991 UL http://bjo.bmj.com/content/75/8/491.abstract AB Fine needle aspiration biopsy (FNAB) was performed in 46 patients with an orbital mass. Positive cytological identification was made in 43 biopsy specimens. In 26 cases with histopathological control the accuracy was 81%. In experienced hands FNAB is safe and appears to be a valuable tool in establishing a diagnosis of malignancy in orbital tumours.