Table 4.

Dermatopathology discrepant cases

Subspecialty	GS diagnosis	DP diagnosis	Third pathologist/multiheader diagnosis	GT	Number of repeats
Skin	Lichenoid inflammation and moderate dysplasia	Lichenoid inflammation. No dysplasia seen	Lichenoid inflammation and moderate dysplasia	GS	Undercall of dysplasia on DP, ×12
Skin	Compound melanocytic naevus	Skin showing dysplastic naevus	Compound melanocytic naevus	GS	Overcall of dysplasia on DP, ×4
Skin	Dysplastic junctional naevus	Lentgo maligna in situ	Dysplastic junctional naevus	GS	None
Skin	Lentigo maligna with early microinvasion	Junctional melanocytic naevus	Lentigo maligna with early microinvasion	GS	None
Skin	Malignant Melanoma in situ in radial growth phase	Severely dysplastic naevus. No evidence of melanoma	Malignant melanoma in situ in radial growth phase	GS	None
Skin	Spitz naevus	Malignant melanoma	Spitz naevus	GS	None
Skin	Actinic keratosis with moderate squamous atypia	Inflammed seborrheic keratosis	Actinic keratosis with moderate squamous atypia	GS	×3
Skin	Irritated seborrhoeic keratosis	Hypertrophic actinic keratosis	Hypertrophic actinic keratosis	DP	×2
Skin	Skin biopsy showing fungal infection and reactive atypia	Chronic nonspecific dermatitis. There is no atypia or malignancy	Pseudo-epitheliomatous hyperplasia secondary to fungal infection	GS	None
Skin	A and B: BCC, completely excised	A: BCC, completely excised B: Scanned but not reported	A: BCC, completely excised B: Scanned but not reported	QC issues	Similar QC issues on DP, ×7

GS: Glass slide, DP: Digital pathology, GT: Ground truth, BCC: Basal cell carcinoma, QC: Quality control