PMID- 31605009 OWN - NLM STAT- MEDLINE DCOM- 20201106 LR - 20210110 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 9 IP - 1 DP - 2019 Oct 11 TI - Keystone-design perforator island flaps for the management of complicated epidermoid cysts on the back. PG - 14699 LID - 10.1038/s41598-019-51289-4 [doi] LID - 14699 AB - Complicated epidermoid cysts (ECs) occur commonly on the back, but few reports have described their management. We present our experience in managing patients with ECs on the back using a keystone-design perforator island flap (KDPIF) reconstruction, thereby focusing on reduction and redistribution of wound tension. Altogether, 15 patients (average age, 48.067 +/- 14.868 years) underwent KDPIF reconstructions after complete excision of complicated ECs on the back. We retrospectively reviewed the medical records and clinical photographs of all patients. Final scar appearance was evaluated using the Patient and Observer Scar Assessment Scale (POSAS). All patients had ruptured ECs, while 6 patients also had cellulitis of the surrounding tissues. All defects, after complete excision of ECs and debridement of surrounding unhealthy tissues, were successfully covered with KDPIF. The mean 'tension-change' at the defect and donor sites was -4.73 +/- 0.21 N and -4.88 +/- 0.25 N, respectively (p < 0.001). The mean 'rate of tension-change' at the defect and donor sites was -69.48 +/- 1.7% and -71.16 +/- 1.33%, respectively (p < 0.001). All flaps survived with no postoperative complications. The mean observer scar assessment scale (OSAS) summary score and patient scar assessment scale (PSAS) total score were 14.467 +/- 5.069 and 15.6 +/- 6.512, respectively. Overall, we suggest that KDPIF reconstruction is a good surgical modality for the management of complicated ECs on the back. FAU - Yoon, Chi Sun AU - Yoon CS AD - Department of Plastic and Reconstructive Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea. FAU - Kim, Hyo Bong AU - Kim HB AD - Department of Plastic and Reconstructive Surgery, Konyang University Hospital, University of Konyang College of Medicine, Myunggok Medical Research Center, Daejeon, Korea. FAU - Kim, Young Keun AU - Kim YK AD - Kim Young Keun's Plastic and Aesthetic Surgery Clinics, Daejeon, Korea. FAU - Kim, Hoon AU - Kim H AUID- ORCID: 0000-0003-1261-9743 AD - Department of Plastic and Reconstructive Surgery, Konyang University Hospital, University of Konyang College of Medicine, Myunggok Medical Research Center, Daejeon, Korea. FAU - Kim, Kyu Nam AU - Kim KN AD - Department of Plastic and Reconstructive Surgery, Konyang University Hospital, University of Konyang College of Medicine, Myunggok Medical Research Center, Daejeon, Korea. manabear77@naver.com. LA - eng PT - Case Reports PT - Journal Article DEP - 20191011 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 SB - IM MH - Adult MH - Aged MH - Back/*pathology MH - Cicatrix MH - Debridement MH - Epidermal Cyst/*surgery MH - Female MH - Graft Survival MH - Humans MH - Male MH - Middle Aged MH - Perforator Flap/*transplantation MH - Retrospective Studies MH - Skin Transplantation/*methods MH - Transplant Donor Site MH - Treatment Outcome PMC - PMC6789127 COIS- The authors declare no competing interests. EDAT- 2019/10/13 06:00 MHDA- 2020/11/11 06:00 PMCR- 2019/10/11 CRDT- 2019/10/13 06:00 PHST- 2019/04/10 00:00 [received] PHST- 2019/09/28 00:00 [accepted] PHST- 2019/10/13 06:00 [entrez] PHST- 2019/10/13 06:00 [pubmed] PHST- 2020/11/11 06:00 [medline] PHST- 2019/10/11 00:00 [pmc-release] AID - 10.1038/s41598-019-51289-4 [pii] AID - 51289 [pii] AID - 10.1038/s41598-019-51289-4 [doi] PST - epublish SO - Sci Rep. 2019 Oct 11;9(1):14699. doi: 10.1038/s41598-019-51289-4.