Analysis of image-guided superficial radiation therapy (IGSRT) on the treatment of early-stage non-melanoma skin cancer (NMSC) in the outpatient dermatology setting. 2023

Alison Tran, and Mairead Moloney, and Peter Kaczmarski, and Songzhu Zheng, and Alpesh Desai, and Tejas Desai, and Lio Yu
Menter Dermatology Research Institute, Baylor University Medical Center, Dallas, TX, USA. atran@menterderm.com.

BACKGROUND Interest in image-guidance superficial radiation therapy (IGSRT) for the treatment of early-stage non-melanoma skin cancer (NMSC) has resurfaced given its low complication rates, superior cosmesis and local control and cure rates. In addition, it has been recommended by the American Academy of Dermatology (AAD) for early-stage NMSC in patients who are considered poor surgical candidates. METHODS 1899 NMSC lesions were treated with energies ranging from 50 to 100 kilovoltage (kV), for a mean of 20.2 fractions, and treatment dose of 5364.4 centigray (cGy). Lesions were treated for a mean of 7.5 weeks and followed for 65.5 weeks. SAS studio was used to conduct Kaplan-Meier analysis to calculate local control rates and account for differences in follow-up intervals. A log-rank test was used to calculate statistical differences between histologies. RESULTS Absolute lesion control was achieved in 99.7% of the patients after an average of 7.5 weeks of treatment, with a stable control rate of 99.6% when the follow-up duration was over 12 months. 95% of lesions with toxicity scoring received a Radiation Treatment Oncology Group Toxicity (RTOG) score of 1 or 2. CONCLUSIONS IGSRT has a high safety profile, can achieve superior cosmesis and should be considered first-line for treating early-stage NMSC tumors as cure rates have been shown to be effective in all NMSC on early follow-up.

UI MeSH Term Description Entries
D010045 Outpatients Persons who receive ambulatory care at an outpatient department or clinic without room and board being provided. Out-patients,Out patients,Out-patient,Outpatient
D003880 Dermatology A medical specialty concerned with the skin, its structure, functions, diseases, and treatment.
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012878 Skin Neoplasms Tumors or cancer of the SKIN. Cancer of Skin,Skin Cancer,Cancer of the Skin,Neoplasms, Skin,Cancer, Skin,Cancers, Skin,Neoplasm, Skin,Skin Cancers,Skin Neoplasm
D061089 Radiotherapy, Image-Guided The use of pre-treatment imaging modalities to position the patient, delineate the target, and align the beam of radiation to achieve optimal accuracy and reduce radiation damage to surrounding non-target tissues. Image-Guided Radiation Therapy,Radiotherapy Target Organ Alignment,Target Organ Alignment, Radiotherapy,Image Guided Radiation Therapy,Image-Guided Radiation Therapies,Image-Guided Radiotherapies,Image-Guided Radiotherapy,Radiation Therapies, Image-Guided,Radiation Therapy, Image-Guided,Radiotherapies, Image-Guided,Radiotherapy, Image Guided,Therapies, Image-Guided Radiation,Therapy, Image-Guided Radiation

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