Photodiagnosis and Photodynamic Therapy (Oct 2024)

ALA-PDT combined with CO2 laser in the treatment of malignant hidroacanthoma simplex: A case report

  • Yulu Chen,
  • Mingshun Wu,
  • Lianjun Chen,
  • Zhenlin Li,
  • Zhongxia Zhou,
  • Wei Li,
  • Guolong Zhang

Journal volume & issue
Vol. 49
p. 104299

Abstract

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Hidroacanthoma simplex (HS) is a rare skin appendage tumor that typically appears on the trunk and lower limbs in the elderly. Although HS is a predominantly benign condition, the presence of cellular atypia and dermal infiltration on histological examination indicates malignant HS (MHS). 5-aminolaevulinic acid photodynamic therapy (ALA-PDT) uses a photosensitizer and corresponding light source to cause irreversible damage or death of target cells through a photochemical reaction. Here, we reported the successful treatment of a MHS patient with ALA-PDT using plum-blossom needle pretreatment combined with CO2 laser. After five courses of ALA-PDT, the lesions were completely resolved, and the autonomic activity and smooth surface of the left ring finger were restored. This suggests that ALA-PDT is an effective, minimally invasive and safe treatment modality for MHS.

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