title: Fine-needle aspiration biopsy. Its use in orbital tumors.
abstract: Fifteen orbital tumors have been evaluated with the fine-needle aspiration biopsy (FNAB) technique. The best indication for FNAB is supposed malignant orbital disease. The technique has not been helpful in tumors or inflammatory disease with a high fibrous content. Lesions that are suspected of being pseudotumors are not recommended for FNAB since, even in histologic sections, they are notoriously difficult to distinguish from well-differentiated lymphocytic malignant lymphoma. Benign encapsulated tumors should not be subjected to FNAB.
mesh_terms: D000328:Adult; D000368:Aged; D001707:Biopsy, Needle / Q000379:methods*; D002648:Child; D003390:Cranial Nerve Neoplasms / Q000473:pathology; D003937:Diagnosis, Differential; D005128:Eye Diseases / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009901:Optic Nerve Diseases / Q000473:pathology; D009915:Orbit; D009918:Orbital Neoplasms / Q000473:pathology*