AK	Actinic keratosis
UV	Ultraviolet
5-FU	5-fluorouracil
PDT	Photodynamic therapy
HA	Hyaluronic acid
LSR	Local skin reactions
CCR	Complete clearance rate
SA	Salicylic acid
SL	Solar lentigo
IMI	Imiquimod
NSAID	Nonsteroidal anti-inflammatory drug
COX-2	Cyclooxygenase-2
RCM	Reflectance confocal microscopy
IFN-α	Interferon-alpha
TNF-α	Tumor necrosis factor-alpha
TLR7	Toll-like receptor 7
MAL	Methyl aminolevulinate
ALA	Aminolevulinic acid
ROS	Reactive oxygen species
MMP	Matrix metalloproteinases
TGF-β1	Transforming growth factor-beta 1
MITF	Microphthalmia-associated transcription factor
NADPH	Nicotinamide adenine dinucleotide phosphate hydrogen
cSCC	Cutaneous squamous cell carcinoma
IPL	Intense pulsed light
PDL	Pulsed-dye laser
GAIS	Global Aesthetic Improvement Scale
OTR	Organ transplant recipient
LPNY	Nd:YAG laser