Which of the following conditions is characterized by an interruption in lymphatic drainage?

Lymphedema is a condition that specifically arises from an interruption or obstruction in the normal drainage of lymphatic fluid. In the lymphatic system, lymph fluid is responsible for transporting excess fluid from tissues back into the bloodstream, as well as facilitating the immune response. When there is a disruption in this drainage system, it can lead to the accumulation of lymphatic fluid in the interstitial spaces, resulting in swelling, usually in the extremities.

This condition can be caused by various factors such as surgery (especially if lymph nodes are removed), radiation, infection, or congenital malformations affecting the lymphatic vessels. Consequently, the buildup of lymph fluid creates the characteristic swelling associated with lymphedema, which differentiates it from other medical conditions listed.

While hyperemia refers to increased blood flow to tissues, thrombosis involves the formation of a blood clot that obstructs blood flow and anemia pertains to a deficiency in red blood cells or hemoglobin, none of these directly relate to the lymphatic system's drainage capacity. Thus, lymphedema stands out as the correct answer due to its distinct relationship with the interruption of lymphatic drainage.