| FN | false negative; fibronectin; fluoride number |
|---|---|
| fn | function |
| FNA | Fine Needle Aspiration |
| FNA | fine-needle aspiration |
| FNAB | Fine Needle Aspiration Biopsy |
| FNAB | fine-needle aspiration biopsy |
| FNAC | fine-needle aspiration cytology |
| FNC | fatty nutritional cirrhosis |
| FNCJ | fine needle catheter jejunostomy |
| FND | febrile neutrophilic dermatosis; frontonasal dysplasia |