label: balloon cell malignant melanoma
label_lc: balloon cell malignant melanoma
description: A rare variant of melanoma with a vertical growth phase. It presents as a nodular or polypoid skin lesion. It is characterized by the presence of nodules which contain large melanoma cells with clear, foamy or finely vacuolated cytoplasm. The prognosis is similar to that of other melanomas matched for depth of invasion.