Description: This lesion shows extensive regression with blue/grey dots. No definite melanocytic criteria are noted.

History: Lesion noted on back at skin check, asymptomatic, patient unaware of. PH NMSC only. 2 other melanomas and 2 junctional lentigionous dysplastic naevi also noted on back at this examination. Histology reported as; Sections confirm level 1 (insitu) malignant melanoma with evidence of active and extensive established past regression.