Efficacy and adverse reactions of fractional CO laser for atrophic acne scars and related clinical factors: A retrospective study on 121 patients.

Objective: This study was performed to analyze the efficacy, adverse reactions of fractional CO  laser for atrophic acne scars, and related clinical factors.

Methods: The clinical data of 121 patients with atrophic acne scars treated with ultra-pulsed fractional CO  laser in the Cosmetic Dermatology from August 2014 to March 2020 were retrospectively analyzed. The efficacy and adverse reactions of atrophic acne scar after fractional CO  laser therapy were statistically analyzed.

Nomogram prediction for the overall survival and cancer-specific survival of patients diagnosed with Merkel cell carcinoma.

Background: Merkel cell carcinoma (MCC) is a rare and aggressive neuroendocrine carcinoma of the skin, with a high recurrence rate and a high mortality rate worldwide. The purpose of this article is to construct a nomogram that incorporates significant clinical parameters and predicts the survival of individuals with MCC.

Methods: The Surveillance, Epidemiology, and End Results (SEER) database was employed to retrospectively analyze all confirmed MCC cases from 2004 to 2015.