Abbreviations and Definitions for Common Terms

BaCC = Basil Cell Carcinoma
Biopsy – Tissue sample removed for microscopic examination
BOT = Base of tongue
Brachytherapy = Radiation therapy with internal radioactive “seeds”
CAT/CT = Computed Axial Tomography (scan); CT – Computed (Computer tomography (scan)
CCC - Comprehensive cancer center or clinic; A tumor board at a cancer center will include doctors trained in different disciplines. Having your case presented and evaluated by this type of multidisciplinary team will give you the best options for treatment, considering all possibilities from their different areas of expertise.
http://www.oralcancerfoundation.org/resources/cancer_centers.htm
Dives = Treatments in a HBO Unit
DO = Dental oncologist
DX - Diagnosis
EBT - External beam radiation therapy aka XRT
ENT - Ear, nose, throat Doctor aka Otolaryngologist
FNA = Fine needle aspiration (Needle Biopsy)
Glossectomy - Removal of tongue
HBO - Hyper-baric oxygen Patient given oxygen under pressure prior to dental surgery.
HIPAA = Health Insurance Portability and Accountability Act
HNC = Head and neck cancer
HPV - Human papilloma virus
IMRT = Intensity modulated radiation therapy
http://www.oralcancerfoundation.org/facts/imrt_radiation.htm
Margins - Refers to the margins of biopsied tissue; clean margins indicate that all the visible cancerous cells were removed.
http://www.oralcancerfoundation.org/facts/detailed_biopsy.htm
MET(s) = Metastasis or cancer spread
MO = Medical oncologist
MRI = Magnetic Resonance Imaging (scan)
NCCN - National Comprehensive Cancer Network (an alliance of 20 leading comprehensive cancer centers).
http://www.oralcancerfoundation.org/treatment/pdf/head-and-neck.pdf
OCF - Oral Cancer Foundation
PCP = Primary Care physician
PEG - Percutaneous Endoscopic Gastrostomy aka feeding tube
http://www.oralcancerfoundation.org/dental/tube_feeding.htm
PET = Positron emission tomography scan
PT = Physical therapist
QOL = Quality of Life
RAD = Radiation
RND = Radical Neck dissection (sometimes resection) also Modified
RO = Radiation Oncologist
RT = Radiation Therapy [(also Radiotherapy (Radio)]
RX = Prescription or treatment
SCC(a) = Squamous cell Carcinoma – also SqCCA and sq cell ca
Stage - Development of the cancer
http://www.oralcancerfoundation.org/facts/stages_cancer.htm
TNM - System for describing the cancer
TX = Treatment/therapy
Xerostomia - Dry mouth resulting from reduced or absent saliva flow
XRT - Conventional external beam radiation therapy aka EBT

A special thanks to julieann, who found several of the ists and consolidated them into this one.

another list is also located at http://oralcancersupport.org/forums/ubbthreads.php?ubb=showflat&Number=38706&nt=2&page=1