Multicoloured rainbow pattern in a case of aneurysmal dermatofibroma

A spectrum of diseases with the dermatoscopic rainbow pattern

“…Since then, this pattern has been described in both benign and malignant tumors, such as melanoma, basal cell carcinoma, pyogenic granuloma, angiokeratoma, and port-wine stain. 1 , 2 …”

A rare case of aneurysmal dermatofibroma with distinct dermatoscopic findings

“…Since rainbow-like pattern is a dermatoscopic entity most commonly associated with Kaposi sarcoma, Kaposi sarcoma was the main differential diagnosis for that case. 3 In summary, aneurysmal dermatofibroma may show variable, ubiquitous dermatoscopic, and clinical features that may mimic more commonly observed, benign, or malignant cutaneous neoplasms. 5 Therefore, histopathologic examination has the uppermost significance for the determination of aneurysmal dermatofibroma from the other skin diseases.…”

“…3 It is most commonly seen in middle-aged women as a red/purple or blue, single nodule on the extremities; however, the location, the color, and the age at the presentation may vary among different patients. 3 Total excision of the nodule is the treatment of choice, but high recurrence rates have been reported in the literature. 4 Histopathologically, aneurysmal dermatofibroma presents with poorly demarcated nodular proliferation, which occupies the deep dermis, and consists of multiple large vascular areas generating cleft-like spaces centrally, with fibroblasts and histiocytes peripherally.…”

“…Aneurysmal-type dermatofibroma accounts for 1.7% of all dermatofibromas. 3 It is most commonly seen in middle-aged women as a red/purple or blue, single nodule on the extremities; however, the location, the color, and the age at the presentation may vary among different patients. 3 Total excision of the nodule is the treatment of choice, but high recurrence rates have been reported in the literature.…”

Atypical clinical and dermoscopic features of hobnail hemangioma

“…The dermoscopic difference between hobnail hemangioma, neurofibroma and dermatofibroma is mentioned in Table 2. 2,3,[11][12][13][14] In case-1, the hyperplastic and hyperpigmented epidermis masked the dermoscopic vascular structures. In case-2, along with mild hyperplastic and hyperpigmented epidermis, the relatively lower dermal location of the vascular lesion may be responsible for the absence of the dermoscopic vascular feature.…”