RT Journal Article SR Electronic T1 Gross hematuria secondary to use of carboplatin in neoadjuvant treatment of breast cancer with HER2 overexpression JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e245407 DO 10.1136/bcr-2021-245407 VO 15 IS 9 A1 Julia Pastorello A1 Nicolas Almeida Leal da Silva A1 Natalia Bassani Schuch A1 Emanuela Lando YR 2022 UL http://casereports.bmj.com/content/15/9/e245407.abstract AB Breast cancer is a high prevalent neoplasia in women worldwide, and platinum compounds are widely used to treat it. On rare occasions, macroscopic hematuria associated with carboplatin has been identified. Thus, the present study aims to report a rare case of a female patient diagnosed with invasive ductal carcinoma, which presented hematuria secondary to carboplatin, showing improvement of the condition after 4 days of expectant treatment with clot lavage. Due to the scant description of hematuria secondary to carboplatin in the scientific literature, it is essential to report such case in order to assist and enrich the understanding of this event.