It will then act like a magnet for water, continuously attracting more water from the blood to accumulate in the tissue spaces. Others
Swollen legs, feet and ankles are common in late pregnancy. The problem is partly caused by the weight of the uterus on the major veins of the pelvis. It usually clears up after delivery of the baby, and is mostly not a cause for concern, though it should always be reported to a doctor. Lack of exercise is another common cause of water retention in the legs. Exercise helps the leg veins work against gravity to return blood to the heart. If blood travels too slowly and starts to pool in the leg veins, the pressure can force too much fluid out of the leg capillaries into the tissue spaces. The capillaries may break, leaving small blood marks under the skin. The veins themselves can become swollen, painful and distorted – a condition known as varicose veins. Muscle action is needed not only to keep blood flowing through the veins but also to stimulate the lymphatic system to fulfil its "overflow" function. Long-haul flights, lengthy bed-rest, immobility caused by disability and so on, are all potential causes of water retention. Even very small exercises such as rotating ankles and wiggling toes can help to reduce it.Certain medications are prone to causing water retention.
Mediastinal lymphadenopathy or mediastinal adenopathy is an enlargement of the mediastinal lymph nodes. Causes
There are many possible causes of mediastinal lymphadenopathy, including: 

Tuberculosis
Sarcoidosis
Lung cancer/oesophageal cancer
Lymphangitis carcinomatosa
Cystic fibrosis
Histoplasmosis
Acute lymphoblastic leukemia
Coccidioidomycosis
Lymphoma
Whipples disease
Goodpasture syndrome
Hypersensitivity pneumonitisInflammatory response to Silicone (leaked from ruptured implants) which has migrated and collected in mediastinal lymph nodes. Silicone mediastinal lymphadenopathy. See also
Lymphadenopathy
Mediastinum
Mediastinal lymph node
Mediastinal mass
Neoplasia


== References ==