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Malignant Melanoma In Situ in New Lesion With Subtle Gross Features

Malignant Melanoma In Situ in New Lesion With Subtle Gross Features

Malignant Melanoma In-Situ

Malignant Melanoma In-Situ

A 47-year-old woman with a history of non-melanoma skin cancer presented for a total body skin check. She had missed several previous appointments and had not been seen in 2 years.

Key point: During the examination, a 5 × 3-mm pigmented macule was noted on the anteromedial aspect of the right foreleg. Most important, the asymptomatic lesion had a small spot of eccentric darker pigmentation. The patient was unaware of the questionable growth.

Treatment: This type of eccentric pigmentation strongly suggests malignant melanoma. Since the lesion was so small, it was excised with 5-mm margins. Histology demonstrated malignant melanoma in situ. No further treatment was required, although the patient was admonished to keep future appointments.

Note: Patients may not notice even the most obviously suspicious skin lesions. Periodic examinations by a qualified health care professional are essential in high-risk individuals.

 
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