Research
The division of Dermatologic Surgery and Cutaneous Oncology maintains an active research program related to skin cancer and melanoma, as well as plastic reconstruction and wound healing. A major focus of our research is on advanced methods of identification of skin cancer with greater risk of progression or metastasis and optimizing management of these cancers. We recently identified several pathologic features of perineural invasion in squamous cell carcinoma that are associated with poor prognosis. Work is ongoing to improve the pathologic staging of these tumors and identify patients who would benefit from additional treatment. Similarly, we have studied rates of incomplete surgical excision of melanoma in situ and reported-on cases that are most likely to require Mohs surgery or staged excision techniques. We are currently analyzing intraoperative pathologic specimens from Mohs micrographic surgery of melanoma in situ to more accurately characterize the microscopic features of these cancers at the surgical margin and thus improve surgical management. Among our additional innovative initiatives is a collaboration with the Department of Bioengineering within Yale College to develop a novel device to automate skin biopsy. Many of these projects have benefitted from collaboration with investigators in other departments both at Yale and throughout the United States.
Additional Areas of Research
- Defining the genetic changes induced by chronic ultraviolet exposure that lead to skin cancer
- Using clinical and histopathologic evidence of sun damage and precancerous lesions to improve skin cancer risk assessment
- Employing field treatments such as photodynamic therapy and acitretin to decrease the risk of skin cancer
- Characterizing pathologic and clinical features of rare skin cancers such as cutaneous sarcoma to optimize treatment
- Describing optimal healing strategies for surgical defects of the nose and eyelids
- Utilizing laser treatment for medical dermatologic conditions such as scleroderma and cutaneous lupus
Selected Publications
- Factors affecting outcomes of second intent healing of nasal defects after Mohs micrographic surgery.Kim DN, Kibbi N, Christensen SR, Leffell DJ, Suozzi KC. Arch Dermatol Res. 2023 Jan; 2022 Feb 2. PMID: 35112163.
- Clinical factors impacting clear margins of primary melanoma in situ with conventional excision in a retrospective cohort.Olamiju B, Suozzi KC, Leffell DJ, Christensen SR. J Am Acad Dermatol. 2022 Apr; 2021 Apr 20. PMID: 33848603.
- A Histopathologic Scoring System for Perineural Invasion Correlates With Adverse Outcomes in Patients With Cutaneous Squamous Cell Carcinoma.Totonchy MB, McNiff JM, Suozzi KC, Leffell DJ, Christensen SR. Dermatol Surg. 2021 Apr 1. PMID: 33795563.
- Ultradeep sequencing differentiates patterns of skin clonal mutations associated with sun-exposure status and skin cancer burden.Wei L, Christensen SR, Fitzgerald ME, Graham J, Hutson ND, Zhang C, Huang Z, Hu Q, Zhan F, Xie J, Zhang J, Liu S, Remenyik E, Gellen E, Colegio OR, Bax M, Xu J, Lin H, Huss WJ, Foster BA, Paragh G. Sci Adv. 2021 Jan; 2021 Jan 1. PMID: 33523857.
- Photodynamic therapy for cutaneous squamous cell carcinoma in situ: Impact of anatomic location, tumor diameter, and incubation time on effectiveness.Kibbi N, Zhang Y, Leffell DJ, Christensen SR. J Am Acad Dermatol. 2020 May; 2019 Nov 8. PMID: 31712171.
- Comparison of Survival After Mohs Micrographic Surgery vs Wide Margin Excision for Early-Stage Invasive Melanoma.Cheraghlou S, Christensen SR, Agogo GO, Girardi M. JAMA Dermatol. 2019 Nov 1. PMID: 31553403.