Lentigo maligna and contiguous pigmented lesion

Lentigo maligna (LM), a subtype of melanoma in-situ, is seen mostly in patients between 50 and 80 years old and accounts for ten to fifteen percent of skin cancer cases. LM is a traditional term for atypical pigmented macular lesions. LM occurs on severely sun damaged skin and it is usually on the face of elderly patients. Histological diagnosis of atypical pigmented macular lesions have extensive range from solar lentigo to in-situ melanoma (lentigo maligna pattern) or invasive invasive melanoma (lentigo maligna melanoma). The presence of solar lentigo, pigmented actinic keratosis, or reticulated seborrheic keratosis in incisional specimen could misguide the pathologist and clinician. they might think that lentigo maligna is not present. Therefore, excisional biopsy is needed in such cases. Our aim in presenting this case was to emphasize the importance of clinicopathologic correlation and to attract attention on the lesions adjacent to lentigo maligna which can lead to a misdiagnosis.