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A comparative study of the efficacy of fractional neodymium-doped yttrium aluminum garnet (Nd:YAG) laser therapy alone and in combination with erbium:YAG laser therapy: tracing and objective measurement of melanin index in macular amyloidosis

  • Mohammad Ali Nilforoushzadeh
  • Sara ZolghadrEmail author
  • Maryam Heidari-Kharaji
  • Shiva Alavi
  • Mona Mahmoudbeyk
Original Article

Abstract

Macular amyloidosis (MA) is a common form of primary localized cutaneous amyloidosis, characterized by the eruption of brown pigments of the skin with a rippled pattern. MA can be of cosmetic concern for patients, and its treatment is challenging. In this study, we aimed to find new effective approaches for MA treatment. A total of 39 patients with the clinical diagnosis of MA were treated with two types of laser therapy, and the effectiveness of each approach was examined. Fractional Q-switched 10.64 nm neodymium-doped yttrium aluminum garnet (Nd:YAG) laser therapy was compared with a combination of fractional Q-switched 10.64 nm Nd:YAG laser and long-pulsed fractional erbium:YAG laser therapy. Melanin biometric measurements were performed using a Mexameter, objective image-based evaluation was carried out, and the itching score and patient satisfaction were examined. Mexameter-based analysis showed that both types of laser therapy were effective in the treatment of MA, causing a significant decrease in the amount of melanin in the treated areas (P < 0.05). Also, combination of two types of laser therapy was significantly more effective than one type alone (P < 0.05). The itching score significantly decreased in patients undergoing a combination of laser therapies. Also, a positive correlation was observed between the amount of melanin and degree of itching in the treated areas. Moreover, analysis of patient satisfaction showed that more than 90% of patients had excellent satisfaction with combination laser therapy. The results confirmed the significant positive effects of both fractional Nd:YAG laser alone and in combination with fractional erbium:YAG laser therapy considering the reduction in melanin content; however, combination of two types of laser therapy was more effective than one type alone. Trial registration: IRCT20080901001159N23

Keywords

Macular amyloidosis Laser Melanin Fractional Nd:YAG laser Erbium:YAG laser 

Notes

Acknowledgments

We appreciatively acknowledge the colleagues and staffs in Jordan Clinic, Tehran University of Medical Sciences, Tehran, Iran.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Ethical statement

The authors state that the patient has given her informed consent for the photos and details.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2020

Authors and Affiliations

  1. 1.Skin and Stem Cell Research CenterTehran University of Medical SciencesTehranIran
  2. 2.Jordan Dermatology and Hair Transplantation CenterTehranIran

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