Diagnosis: Lentiginous Melanoma
Description: Focal upward spread.
Clinical Features: Macule brown
Pathology/Site Features: Pagetoid cells
Sex: M
Age: 79
Submitted By: Ian McColl
Differential DiagnosisHistory: 4412dh Elderly male with this lesion on his upper arm that he was not aware of. Unusual dermatoscopic pattern of multiple dots but no obvious pigment network. Large shave biopsy taken. DD Pigmented IEC, regressed seb k Exclude melanocytic lesion.
Description: lentiginous melanoma
Comments: Atypical intraepidermal melanocytic proliferation with nested and lentiginous pattern. Focal upward spread.