Keerathikajornchai C, Chanprapaph K. Unusual variant of keratoacanthoma with spontaneous regression. Thai J Dermatol [internet]. 2026 Jun. 11 [cited 2026 Sep. 14];27(2):142-6. available from: https://he02.tci-thaijo.org/index.php/TJD/article/view/282968