Dermatoscopic pattern of a spiradenoma

Dermatoscopic features of spiradenoma—a benign adnexal neoplasm—have not been described. We present a case of spiradenoma occurring on the occipital scalp (Figure 1A, 1B) that showed a structureless pattern and blue clods on dermatoscopy. The vascular pattern of serpentine, branched vessels (Figure 2) in combination with blue clods suggest a basal cell carcinoma (BCC) [1]. However, the blue clods in BCC represent nests of pigmented trichoblasts, whereas in this case of spiradenoma the blue clods correspond to hemorrhage, a frequent finding in spiradenoma. This example also demonstrates that branched vessels seen by dermatoscopy are not specific and that they can be found in any kind of adnexal neoplasm, not only in BCC. Dermatoscopic pattern of a spiradenoma