case_images: PMC5726696_01
case_images: Isolated and ulcerated tumor
case_images: abd-92-05-s1-0113-g01.jpg
case_images: PMC5726696_01_abd-92-05-s1-0113-g01.jpg
case_images: f1
case_images: Physical examination revealed a 0.5cm round ulcerated tumor on the right palm (Figure 1).
case_images: Skin biopsy. This case shows osseous nodules on dermis composed of
  lamellar bone with osteocytes and epidermis with marked hyperkeratosis
  (Hematoxylin & eosin stains - X40)
case_images: abd-92-05-s1-0113-g02.jpg
case_images: PMC5726696_01_abd-92-05-s1-0113-g02.jpg
case_images: f2
case_images: A 4 mm punch biopsy specimen from the lesion was obtained and stained with hematoxylin and eosin (Figure 2), which showed fragments of mature bone in the upper dermis.