الفهرس 
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Abstract
Background: Fractional carbon dioxide (CO2) laser and neodymium doped yttrium aluminum garnet (Nd-YAG) laser have been reported to have promising results in the management of keloids. So far there have been no comparative studies between these laser modalities. Objective: The study aimed to compare the efficacy of fractional CO2, NdYAG, and a combination of both in the management of keloids. Patients and methods: Forty-five keloid patients were divided into 3 equal groups: the first received fractional CO2 only, the second received Nd-YAG only, while the third received a combination of both lasers. Each group received its designated treatment every 4 weeks for 4 sessions. The improvement was evaluated by the “Patient and Observer Scar Assessment Scale” (POSAS). Detection of procollagen I mRNA by real-time reverse transcriptase-polymerase chain reaction ( RT-PCR) analysis was done. Results: The assessment by POSAS showed the most significant clinical improvement in the combination group and a less significant improvement in the fractional CO2 group while the least improvement was seen in the NdYAG group. Molecular assessment via procollagen I yielded matching results. Conclusion: The study showed that the combination of fractional CO2 and Nd-YAG lasers has a synergistic effect being the most effective in the management of keloids, fractional CO2 being more effective than ND-YAG and Nd-YAG being the least effective.