Final answer:
Obstruction of lymphatic channels due to the spread of malignant tumors can result in fluid buildup, swelling, and compromised immune function, potentially leading to further health issues.
Step-by-step explanation:
If a patient's lymphatic channels have been obstructed by the spread of malignant tumors, several complications can occur. The lymphatic system is responsible for moving fluids from tissues into the circulatory system and for filtering lymph. When the lymphatic channels are blocked, fluid can build up, leading to swelling and the potential for additional health issues such as infections and further spreading of cancer.
Additionally, the lymphatic system plays a vital role in immunity, so when it is compromised by tumors, the body's defense against infections and disease can be adversely affected. As seen in patients with lymphoma or other cancers that have spread to the lymphatic system, compromised lymph nodes and vessels can lead to systemic symptoms and may require specific treatments to manage the cancer and associated symptoms.