The AJCC, or American Joint Committee on Cancer, is an organization that plays a crucial role in cancer research and treatment. Founded in 1959, it focuses on creating standardized cancer staging systems, which help doctors determine the extent of cancer in patients. This staging is essential for planning treatment and predicting outcomes. The AJCC publishes the AJCC Cancer Staging Manual, which is widely used by healthcare professionals. This manual provides detailed guidelines on how to classify different types of cancer based on tumor size, lymph node involvement, and the presence of metastasis. By standardizing cancer staging, the AJCC enhances communication among medical professionals and improves patient care.