| FBSS | failed back surgery syndrome |
|---|---|
| FCMS | Fellow of the College of Medicine and Surgery; Foix-Chavany-Marie syndrome |
| FDS | Fellow in Dental Surgery; fiber duodenoscope; flexor digitorum superficialis |
| FDSRCSEng | Fellow in Dental Surgery of the Royal College of Surgeons of England |
| FESS | functional endoscopic sinus surgery |