Lymphoma is a type of cancer characterized by the uncontrolled growth of abnormal lymphocytes, the white blood cells central to the immune system. This malignancy arises from the germinal centers of the lymphatic organs, such as lymph nodes, the spleen, or the thymus, affecting the tissues that filter and manage immune responses. The condition is broadly classified into different types based on the affected location and the specific immune cell type involved, ranging from localized growths to systemic diseases. Diagnosis generally involves identifying the presence of abnormal cells in a biopsy sample and classifying the specific clonality of the malignant population, allowing for targeted monitoring and management strategies.