Dermatologic adverse events in breast cancer patients receiving endocrine therapies.

e12533 Background: Endocrine therapies are known to cause adverse events including hot flashes, arthralgias, and dyspareunia. Dermatologic adverse events (dAE), including alopecia are infrequently reported, despite their potential impact on quality of life (QoL). This study aims to characterize endocrine therapy-related dAE including alopecia, acne, xerosis, and onychodystrophy. Methods: A retrospective chart review (2005-2015) of patients referred to the dermatology service for dermatologic conditions developing during endocrine therapies was performed. Relevant data was abstracted from each patient’s medical record including demographics, primary cancer diagnosis, and dAEs by grade (CTCAE v4.03). The psychosocial impact of alopecia was assessed in a subset of patients using a QoL questionnaire (Hairdex), which includes the following domains: ‘emotions’, ‘functioning’, ‘symptoms’, ‘stigmatization’ and ‘self-confidence’. Results: A total of 74 breast cancer patients treated with endocrine therapies were included (median age 62yrs. [range, 34-85]). Alopecia was the reason for a dermatologic consultation in all patients, and was attributable to aromatase inhibitors (AI) in 49 patients (66.2%) and tamoxifen in 22 (29.3%). The mean duration of treatment at the time of alopecia diagnosis was 24 months (SD ±14.3). In 93.2% of the patients, alopecia was grade 1 in severity, and in 6.8% it was grade 2 (the latter was attributable to AIs only). All grade xerosis was identified in 34 (45.9%), onychodystrophy in 21 (28.4%) and acne in 9 patients (12.2%). In patients who completed the Hairdex questionnaire (n = 44), a high ‘emotions’ (52.6, p < 0.05) and ‘stigmatization’ (46, p < 0.05) domains score were found, while ‘symptoms’ (22.1, p < 0.05) and ‘functioning’ (24.5, p < 0.05) domains score were lower. Conclusions: Endocrine therapies are associated with alopecia and dAEs, with a greater severity with AIs. A psychosocial impact on emotions was seen in patients with alopecia. Moreover, xerosis, acne, and onychodystrophy were also observed. These findings underscore the need for increased attention to dAE in breast cancer patients receiving endocrine agents, in order to maintain quality of life and adherence to therapies.