skin biopsies from patients with histologically confirmed lichen planus , discoid lupus erythematosus , psoriasis , actinic keratosis , squamous cell carcinoma , bowen 's disease , keratoacanthoma , malignant melanoma , inflamed serborrhoeic warts , sarcoidosis , follicular lymphoma and multicentric reticulohistiocytosis were examined .
C0007137
squamous cell carcinoma
C0006079
bowen 's disease