Diagnosis of Persistent Chemotherapy-Induced Alopecia in Breast Cancer Survivors

To the Editor We read with great interest the analysis of a cohort of breast cancer survivors with alopecia by Bhoyrul et al.¹ Determining adverse events to treatments is key in oncodermatology, such that the grading system used in oncology studies (the Common Terminology Criteria for Adverse Events)² has 5 categories: definite, probable, possible, unlikely, or unrelated. The importance of proper causation lies in the notion that multimodal (ie, systemic therapy, radiation) and polypharmacy (multiple systemic agents) are common in cancer treatments.