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Erschienen in: Lasers in Medical Science 6/2019

04.01.2019 | Original Article

Persistent Pixel Stamping Marks: a novel complication of fractional CO2 laser in scar treatment

verfasst von: Samia M. Esmat, Mona R. E. Abdel-Halim, Heba I. Gawdat, Marwa Kamel, Amany ElRamly, Kholoud Helmy, Soheir M. Esmat

Erschienen in: Lasers in Medical Science | Ausgabe 6/2019

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Abstract

Fractional CO2 laser rejuvenation of scars offers a high safety profile. Laser marks usually disappear clinically within 1 week. The authors observed occasional persistence of the laser marks on the scar surface. The purpose of this study is to report the incidence and to describe the clinical, dermoscopic, and histological features of a novel observed complication of fractional CO2 laser scar rejuvenation “Persistent Pixel Stamping Marks (PPSM)”.One hundred seventy-one cases were consecutively recruited from patients assigned for fractional CO2 laser scar rejuvenation. Patients who developed the phenomenon 1 month post laser session were recorded and subjected to clinical photography, dermoscopy, and optical coherence tomography (OCT) as well as a 4-mm punch biopsy from pixelated scars. The evolution of PPSM was followed up for 6 months. PPSM developed in 16 patients (9.4%), 15 of which were post burn hypertrophic scars. PPSM was significantly related to darker skin type, darker scar color, and longer scar duration. Histopathological findings included characteristic holes in stratum corneum and superficial dermis, thick collagen bundles perpendicular to the skin surface with loss of elastic tissue, focal interface changes, and triangular focus of fibroblastic proliferation. The marks disappeared in 5 and lasted in 11 patients. Their longevity was significantly related to longer dwell times and lower densities. PPSM represent miniature scarring at the sites of the microscopic thermal zones or a sign of their delayed healing. They tend to follow fractional CO2 laser resurfacing of hyperpigmented, long-standing burn scars. Longer dwell times and lower densities make them last longer.
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Metadaten
Titel
Persistent Pixel Stamping Marks: a novel complication of fractional CO2 laser in scar treatment
verfasst von
Samia M. Esmat
Mona R. E. Abdel-Halim
Heba I. Gawdat
Marwa Kamel
Amany ElRamly
Kholoud Helmy
Soheir M. Esmat
Publikationsdatum
04.01.2019
Verlag
Springer London
Erschienen in
Lasers in Medical Science / Ausgabe 6/2019
Print ISSN: 0268-8921
Elektronische ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-018-02700-5

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