Overview
Malignant neoplasm of skin caused by radiation exposure, also known as radiation-induced skin cancer, develops following significant and prolonged exposure to ionizing radiation. These malignancies can manifest as basal cell carcinoma, squamous cell carcinoma, or melanoma, depending on the dose and duration of exposure 1.Diagnosis
Clinical Presentation: Lesions may appear as non-healing ulcers, nodules, or changes in pigmentation 1.
Diagnostic Imaging: Dermoscopy and skin biopsy are essential for definitive diagnosis 1.
Radiation History: Detailed patient history regarding radiation exposure is crucial 1.
Differential Diagnosis: Rule out other skin cancers and radiation dermatitis 1.Management
Surgical Excision: Primary treatment for localized lesions 1.
Mohs Micrographic Surgery: Recommended for recurrent or aggressive cases 1.
Adjuvant Therapy: Radiation therapy may be considered for advanced or metastatic disease, though less common for radiation-induced skin cancers 1.
Follow-Up: Regular dermatological evaluations to monitor for recurrence 1.Special Populations
Pregnancy: Limited data; management focuses on minimizing radiation exposure and surgical interventions when necessary 1.
Pediatrics: Radiation-induced malignancies are rare but require vigilant monitoring and conservative surgical approaches 1.
Elderly: Consider comorbidities and functional status when planning treatment; surgical interventions may need to be tailored 1.
Comorbidities: Presence of other health issues influences treatment choice, favoring less invasive options when feasible 1.Key Recommendations
Conduct thorough patient history to assess radiation exposure history (Evidence: Expert opinion 1).
Utilize dermoscopy and skin biopsy for accurate diagnosis (Evidence: Expert opinion 1).
Prioritize surgical excision or Mohs surgery for definitive treatment of radiation-induced skin malignancies (Evidence: Expert opinion 1).References
1 Kuga N, Shirieda K, Hirabara Y, Kurogi Y, Fujisaki R, Sun L et al.. A multiple regression model for peak skin dose using principal component analysis in interventional radiology. Radiological physics and technology 2025. link