Blue nevus with a dermoscopic appearance of peripheral streaks with branches.
Blue nevi are dermal dendritic melanocytic proliferations presenting as papules, nodules or plaques of blue, blue-gray or blue-brown color. Dermoscopic appearance commonly shows global patterns as homogeneous mono/dichromatic pigmentation and multichromatic pigmentation. Here, we report the case of a blue nevus with the dermoscopic feature of peripheral streaks with branches. With histopathologic deep sections, we confirmed that dermal dendritic melanocytes were distributed in the direction of the streaks. We emphasize that streaks are a rare but important sign of blue nevi.
Department of Dermatology, Faculty of Medicine, Kinki University, Osaka-Sayama, Kishiwada, Japan ; Department of Dermatology, Kishiwada City Hospital, Kishiwada, Japan.
Sachiko
S
Sakamoto
Department of Dermatology, Faculty of Medicine, Kinki University, Osaka-Sayama, Kishiwada, Japan.
Naoki
N
Oiso
Department of Dermatology, Faculty of Medicine, Kinki University, Osaka-Sayama, Kishiwada, Japan.
Tomohiko
T
Narita
Department of Dermatology, Faculty of Medicine, Kinki University, Osaka-Sayama, Kishiwada, Japan.
Akira
A
Kawada
Blue nevus; Dermoscopy; Differential diagnosis; Malignant melanoma; Peripheral streaks; Spitz nevus