case_images: PMC10473049_01
case_images: The presentations of ingrowing hair. The anterior abdominal shows pigmentation after carbon dioxide laser treatment (red arrow); a 4-cm-long black linear lesion beneath the skin located on the left lower abdomen associated with inflammatory erythema around (blue arrow) (A). The dermoscopy shows a black line under the skin without vasodilation (x20, polarized light) (B). A hair is pulled out with the association of bleeding by the forceps (C). The microscope shows a hair shaft with follicles (D).
case_images: CCID-16-2329-g0001.jpg
case_images: PMC10473049_01_CCID-16-2329-g0001.jpg
case_images: f0001
case_images: A dermatologist suspected cutaneous larva migrans; however, no larva was found after carbon dioxide laser treatment, leaving pigmentation on the anterior abdominal skin (Figure 1A, red arrow). Physical examination revealed a 4 cm long, slightly elevated, black linear eruption in the skin of the left lower abdomen, with inflammatory erythema surrounding the lesion (Figure 1A, blue arrow). Dermoscopy revealed a thick black line below the skin resembling a hair shaft without vasodilation (Figure 1B). Subsequently, we pierced the skin over one-third of the lesion using a sterile syringe and clamped the black line with forceps, pulling it out with minor bleeding (Figure 1C). The black line was identified as a hair shaft with intact follicles under a light microscope (Figure 1D).