The first patient was a 43-year-old man with a slightly elevated macule on his right chest that was first noted 5 years previously. A pinkish brown atrophic macule, 12×5 mm in size, with an elastic hard induration underneath the macule was observed. The second patient was a 79-year-old woman with a macule on her left breast since 50 years. The lateral part of the macule started protruding as a nodule a few months ago. Physical examination revealed a pinkish brown atrophic macule, 30×10 mm in size. The nodule on the macule was firm and 10 mm in size. An elastic hard induration was palpable underneath the macule. Histopathologically, both cases showed that spindle-shaped cells with chromatin-rich-nuclei were infiltrating from the dermis to the adipose layer, forming a storiform pattern. Those cells were CD34 positive. In the first case, the lesion was surgically removed with a 30-mm border, resulting in a negative surgical margin. In the second case, no additional resection after excisional biopsy was performed owing to the negative margin. There was no evidence of recurrence during the 10 years and 1.5 years of follow-up, respectively.[Skin Cancer (Japan) 2016 ; 31 : 150-155]