AbstractCancer remains a significant public health challenge in Brazil, with an estimated 704 thousand new cases annually. Clinical oncology, a pivotal specialty in cancer diagnosis and treatment, has evolved since its formal establishment in 1946. Recent recognition by the Brazilian Federal Board of Medicine solidified its status, culminating in normative resolution nr. 2,162/2017. The present study aims to characterize Brazilian clinical oncologists and analyze their epidemiological and structural contexts using data from the Brazilian Society of Clinical Oncology's 2023 census and secondary sources, including the National Cancer Institute (Instituto Nacional de Câncer [INCA], in Portuguese) and Brazilian Institute of Geography and Statistics (Instituto Brasileiro de Geografia e Estatistica [IBGE], in Portuguese). A cross-sectional design employing qualitative-quantitative methods surveyed 761 clinical oncologists, revealing insights into demographics, workload, stress levels, and challenges. The results highlight regional disparities in cancer mortality rates despite the concentration of oncology services in the South and Southeast. Challenges include access to new treatments, late diagnoses, and systemic underfunding. Moreover, this study underscores gender and racial disparities within the specialty, indicating a predominantly white and heterosexual profile among practitioners. Addressing these issues is crucial for enhancing healthcare equity and improving patients' outcomes in oncology practice.