Acronym	Definition
μm	micrometre
AK	actinic keratosis
ANN	artificial neural network
BCC	basal cell carcinoma
BD	Bowen’s disease
BPC	between‐person comparison (of tests)
CAD	computer‐assisted diagnosis
CCS	case‐control study
CS	case series
cSCC	cutaneous squamous cell carcinoma
D‐	disease negative
D+	disease positive
Derm–CAD	digital dermoscopy‐based computer‐assisted diagnosis
DF	dermatofibroma
DRS	diffuse reflectance spectroscopy
DRSi	diffuse reflectance spectroscopy imaging
Dx	diagnosis
EIS	electrical impedance spectroscopy
FN	false negative
FP	false positive
FU	follow‐ up
GP	general practitioner
H&E	haematoxylin and eosin stain
HFUS	high‐frequency ultrasound
Hz	hertz
KHz	kilohertz
K–NN	k nearest neighbour
MHz	megahertz
MiS	melanoma in situ (or lentigo maligna)
MM	malignant melanoma
mm	millimetre
MSI	multi‐spectral imaging
N/A	not applicable
NC	non‐comparative
nm	nanometre
NPV	negative predictive value
NR	not reported
P	prospective
PPV	positive predictive value
PSL	pigmented skin lesion
R	retrospective
RCM	reflectance confocal microscopy
RCT	randomised controlled trial
SCC	squamous cell carcinoma
SD	standard deviation
se	sensitivity
sp	specificity
spectro–CAD	spectroscopy‐based computer–assisted diagnosis
SK	seborrhoeic keratosis
SSM	superficial spreading melanoma
SVM	support vector machine
TN	true negative
TS	telespectrophotometry system
VI	visual inspection
UNREF	unreferred population
WPC	within‐person comparison (of tests)
WPC‐algs	within‐person comparison (of algorithms)