Isoherranen K, O'Brien JJ, Barker J, et al. Atypical wounds. Best clinical practice and challenges. J Wound Care. 2019;28(Sup6):S1–92. https://doi.org/10.12968/jowc.2019.28.Sup6.S1.

Article  PubMed  Google Scholar 

Shelling ML, Federman DG, Kirsner RS. Clinical approach to atypical wounds with a new model for understanding hypertensive ulcers. Arch Dermatol. 2010;146(9):1026–9.

Article  PubMed  Google Scholar 

Van Driessche FKR. Atypical wounds. In: Ayello EA, Barnoski S. Wound care essentials. Philadelphia: Lippincott Williams & Wilkins; 2016.

Google Scholar 

Janowska A, Dini V, Oranges T, et al. Atypical ulcers: diagnosis and management. Clin Interv Aging. 2019;14:2137–43. https://doi.org/10.2147/CIA.S231896.

Article  PubMed  PubMed Central  Google Scholar 

Hoffman MD. Atypical ulcers. Dermatol Ther. 2013;26(3):222–35.

Article  PubMed  Google Scholar 

de Araujo TKR. Atypical wounds. In: Ayello EA, Barnoski S. Wound care essentials. Philadelphia: Lippincott Williams & Wilkins; 2004.

Google Scholar 

Mahmoudi M, Gould L. Opportunities and challenges of the management of chronic wounds: a multidisciplinary viewpoint. Chronic Wound Care Manag Res. 2020;7:27–36.

Article  Google Scholar 

Huang Y, Mao B, Ni P, et al. Investigation on the status and determinants of caregiver burden on caring for patients with chronic wound. Adv Wound Care (New Rochelle). 2019;8(9):429–37. https://doi.org/10.1089/wound.2018.0873.

Article  PubMed  PubMed Central  Google Scholar 

Falanga V, Isseroff RR, Soulika AM, et al. Chronic wounds. Nat Rev Dis Primers. 2022;8(1):50. https://doi.org/10.1038/s41572-022-00377-3.

Article  PubMed  PubMed Central  Google Scholar 

Nussbaum SR, Carter MJ, Fife CE, et al. An economic evaluation of the impact, cost, and medicare policy implications of chronic nonhealing wounds. Value Health. 2018;21(1):27–32. https://doi.org/10.1016/j.jval.2017.07.007.

Article  PubMed  Google Scholar 

Afsaneh Alavi HIM. Local wound care for dermatologists. 1st ed. Updates in clinical dermatology. Cham: Springer; 2020.

Book  Google Scholar 

Solowiej K, Mason V, Upton D. Review of the relationship between stress and wound healing: part 1. J Wound Care. 2009;18(9):357–66.

Article  CAS  PubMed  Google Scholar 

Tiri H, Huilaja L, Jokelainen J, et al. Women with hidradenitis suppurativa have an elevated risk of suicide. J Invest Dermatol. 2018;138(12):2672–74. https://doi.org/10.1016/j.jid.2018.06.171.

Article  CAS  PubMed  Google Scholar 

Woo K, Jimenez C. Quality of life and chronic wound care. In: Ayello EA, Barnoski S. Wound care essentials. Philadelphia: Lippincott Williams & Wilkins; 2016.

Google Scholar 

Hopman WM, Harrison MB, Coo H, et al. Associations between chronic disease, age and physical and mental health status. Chronic Dis Can. 2009;29(3):108–16.

Article  CAS  PubMed  Google Scholar 

Shanmugam VK, Schilling A, Germinario A, et al. Prevalence of immune disease in patients with wounds presenting to a tertiary wound healing centre. Int Wound J. 2012;9(4):403–11.

Article  PubMed  Google Scholar 

Powers JG, Higham C, Broussard K, et al. Wound healing and treating wounds: Chronic wound care and management. J Am Acad Dermatol. 2016;74(4):607–25; quiz 25–6.

Article  PubMed  Google Scholar 

Tang JC, Vivas A, Rey A, et al. Atypical ulcers: wound biopsy results from a university wound pathology service . Ostomy Wound Manage. 2012;58(6):20–2, 4, 6–9.

PubMed  Google Scholar 

Haynes D, Hammer P, Malachowski SJ, et al. Characterisation and diagnosis of ulcers in inpatient dermatology consultation services: A multi-centre study. Int Wound J. 2019;16(6):1440–4.

Article  PubMed  PubMed Central  Google Scholar 

Hwang JM. Time is tissue. Want to save millions in wound care? Start early: a QI project to expedite referral of high-risk wound care patients to specialised care. BMJ Open Qual. 2023;12(1):e002206. https://doi.org/10.1136/bmjoq-2022-002206.

Virkkala J, Polet S, Jokelainen J, et al. Clinical characteristics and comorbidities of the most common atypical wounds in Northern Finland in 1996–2019: A retrospective registry study. Health Sci Rep. 2022;5(5):e864.

Article  PubMed  PubMed Central  Google Scholar 

Ruiz ES, Ingram A, Landriscina A, et al. Identifying an education gap in wound care training in united states dermatology. J Drugs Dermatol. 2015;14(7):716–20.

PubMed  Google Scholar 

Erickson KM, Reese AM, Ortega-Loayza AG. Gap of knowledge in diagnosis of pyoderma gangrenosum in clinical specialties education. Diagnosis (Berl). 2021;8(4):421–4.

Article  PubMed  Google Scholar 

Shakshouk H, Lehman JS, Wu B, et al. Limb amputation in patients with pyoderma gangrenosum: a multi-institutional case series. Arch Dermatol Res. 2023;315(5):1443–8.

PubMed  Google Scholar 

Zahoor S, Siddique S, Mahboob HM. An unusual presentation of polyarteritis nodosa: A case report. Reumatol Clin (Engl Ed). 2020. https://doi.org/10.1016/j.reuma.2020.08.008.

Xu A, Balgobind A, Strunk A, et al. Prevalence estimates for pyoderma gangrenosum in the United States: An age- and sex-adjusted population analysis. J Am Acad Dermatol. 2020;83(2):425–9.

Article  PubMed  Google Scholar 

Braswell SF, Kostopoulos TC, Ortega-Loayza AG. Pathophysiology of pyoderma gangrenosum (PG): an updated review. J Am Acad Dermatol. 2015;73(4):691–8.

Article  CAS  PubMed  Google Scholar 

Kridin K, Cohen AD, Amber KT. Underlying systemic diseases in pyoderma gangrenosum: a systematic review and meta-analysis. Am J Clin Dermatol. 2018;19(4):479–87.

Article  PubMed  Google Scholar 

Al Ghazal P, Körber A, Klode J, et al. Investigation of new co-factors in 49 patients with pyoderma gangrenosum. JDDG: Journal der Deutschen Dermatologischen Gesellschaft. 2012;10(4):251–6.

Article  PubMed  Google Scholar 

Moelleken M, Erfurt-Berge C, Ronicke M, et al. Predilection sites of pyoderma gangrenosum: Retrospective study of 170 clearly diagnosed patients. Int Wound J. 2023;20(10):4227–34. https://doi.org/10.1111/iwj.14323.

Zhao H, Larson C, Schepergerdes BJ, Diefendorf CM, Ortega-Loayza AG, Mostaghimi A. Hundreds of inconsistencies in the nomenclature of pyoderma gangrenosum: The need to harmonise terminology for phenotypes. Int Wound J. 2024;21(1):e14357. https://doi.org/10.1111/iwj.14357.

André MFJ, et al. Aseptic abscesses: a study of 30 patients with or without inflammatory bowel disease and review of the literature. Medicine (Baltimore). 2007;86(3):145–61.

Article  PubMed  Google Scholar 

Haag C, Hansen T, Hajar T, et al. Comparison of three diagnostic frameworks for pyoderma gangrenosum. J Invest Dermatol. 2021;141(1):59–63.

Article  CAS  PubMed  Google Scholar 

Crowson AN, Mihm MC Jr, Magro C. Pyoderma gangrenosum: a review. J Cutan Pathol. 2003;30(2):97–107.

Article  PubMed  Google Scholar 

Binus AM, Qureshi AA, Li VW, et al. Pyoderma gangrenosum: a retrospective review of patient characteristics, comorbidities and therapy in 103 patients. Br J Dermatol. 2011;165(6):1244–50.

Article  CAS  PubMed  Google Scholar 

Hammer P, Latour E, Bohnett MC, et al. The utility and challenges of histopathologic evaluation in the diagnosis of nonmalignant skin ulcers. Wound Repair Regen. 2020;28(2):219–23.

Article  PubMed  Google Scholar 

Min MS, Kus K, Wei N, et al. Evaluating the role of histopathology in diagnosing pyoderma gangrenosum using Delphi and PARACELSUS criteria: a multicentre, retrospective cohort study. Br J Dermatol. 2022;186(6):1035–7.

Article  PubMed  Google Scholar 

Ji-Xu A, Liakos W, Merleev A, et al. Assessing the discriminatory ability of diagnostic criteria for ulcerative pyoderma gangrenosum and its mimickers. JAMA Dermatol. 2023;159(3):337–8.

Article  PubMed  PubMed Central  Google Scholar 

Hodson EL, Salem I, Birkner M, et al. Real-world use of a deep convolutional neural network to assist in the diagnosis of pyoderma gangrenosum. JAAD Case Rep. 2023;38:8–10.

Article  PubMed  PubMed Central  Google Scholar 

Birkner M, Schalk J, von den Driesch P, Schultz E