FNAB
Also written as: FNAB — Fine Needle Aspiration Biopsy
Fine needle aspiration biopsy, a diagnostic procedure to obtain tissue samples from ocular tumors.
Full Definition
Fine needle aspiration biopsy (FNAB) is a minimally invasive diagnostic technique used to obtain cellular material from suspicious intraocular masses for cytological and molecular analysis. In ocular oncology, FNAB is particularly valuable for sampling choroidal and ciliary body lesions when the diagnosis remains uncertain after clinical and imaging evaluation. The procedure involves inserting a fine-gauge needle through the sclera to aspirate cells from the tumor. While FNAB provides important diagnostic information and can guide treatment decisions, it carries theoretical risks including tumor seeding along the needle tract and requires careful patient selection and expert interpretation of cytological findings.
Usage
Usage note: Always spell out on first use in clinical documents.
In Context
- "FNAB of the ciliary body mass yielded melanoma cells with epithelioid morphology." — Pathology consultation
- "The oncology team recommended FNAB to confirm the diagnosis before initiating systemic therapy." — Multidisciplinary team meeting notes