Figure legend:
Figure 1: a 4 cm, dome-shaped erythematous tumor of the left parietal region of the scalp in a 5-year-old child.
Figure 2: A and B, skin biopsy showed a diffuse infiltrate in the entire dermis, composed of medium-sized lymphoid cells with inconspicuous nucleoli, scant cytoplasm, and a high mitotic rate (Haematoxylin and Eosin ×200 and ×600, respectively), C, Immunohistochemical staining revealed positive terminal deoxynucleotidyl transferase cells (TdT, ×200).