Blue nevus - 藍痣
因為痣細胞存在較深，所以呈現藍色。
References
Blue nevus 是指由於黑色素細胞過度生長而引起的一組皮膚增生，在頭部、手臂或臀部出現藍色到黑色的腫塊。它們通常是單一的和後天獲得的，但也可能從出生時就存在並出現在多個區域。這些病灶經常被誤認為是黑色素瘤等深色色素生長，通常在頭皮、手臂、下背部或臀部呈現藍色。
The term blue nevus describes a group of skin lesions characterized by dermal proliferation of melanocytes presenting as blue to black nodules on the head, extremities, or buttocks. In most cases, they are acquired and present as a solitary lesion but may also be congenital and appear at multiple sites. Blue nevi are melanotic dermal lesions that commonly presents as a blue nodule on the scalp, extremities, sacrococcygeal region, or buttocks. Its characteristic blue to black hue is frequently confused with other darker pigmented lesions, including malignant melanoma.
The term blue nevus describes a group of skin lesions characterized by dermal proliferation of melanocytes presenting as blue to black nodules on the head, extremities, or buttocks. In most cases, they are acquired and present as a solitary lesion but may also be congenital and appear at multiple sites. Blue nevi are melanotic dermal lesions that commonly presents as a blue nodule on the scalp, extremities, sacrococcygeal region, or buttocks. Its characteristic blue to black hue is frequently confused with other darker pigmented lesions, including malignant melanoma.
有時會進行活檢，或透過手術切除整個病變。臨床結果一般良好，癌症的機會很小。鑑別診斷包括皮膚纖維瘤和黑色素瘤。