Podiatric Dermatology Quiz: Can You Identify This Tumor?

Can you identify the tumor shown in the photo on the left?

These tumors may occur on virtually any area but are most common on the soles and palms. They most frequently occur in middle-aged to elderly individuals. The lesions are asymptomatic and present as well-circumscribed solitary papules or nodule-sized under 2 cm in diameter. The coloration is pink to reddish and the surface may be smooth to verrucous. Histology will reveal solid masses of monomorphic basaloid cells that may extend into the underlying cystic or ductal structures. Malignant transformation has rarely been reported but one should suspect this when lesions bleed or itch.

Which of the following is your diagnosis?

a) Eccrine poroma
b) Glomus tumor
c) Halo nevus
d) Dermatofibrosarcoma protuberans
e) Dermatofibroma

Editor’s note: This blog is adapted from the handbook, Skin Disease Of The Lower Extremities: A Photographic Guide, from Tracey Vlahovic, DPM, and Stephen M. Schleicher, MD. The book is available for purchase at www.lowerextremityderm.com . The e-book version is available for purchase at https://tinyurl.com/7itt66v , https://tinyurl.com/7j44vez and https://tinyurl.com/couepf5 .

The answer to the last blog (https://www.podiatrytoday.com/blogged/podiatric-dermatology-quiz-can-you-identify-skin-lesion ) is d) Actinic keratosis.