Their could be any number of possible diagnoses; it's a common problem.
The Plague
It is called strangles. WinterBlues from horse isle 1 on roan and horse isle two!
Elephantiasis is a condition that is due to a parasite. The parasite wiggles into your lymph vessels and blocks the flow of lymph back into circulation and causes swelling in the body. The swelling continues to grow and can come debilitating.
Blockage of and lymph vessel is keeping the fluids (usually blood, blood that is in need of cleaning) from entering the lymph node. This blockage causes additional blood that needs to be delivered to the lymph node for filtering to back up, kind of waiting for it's turn. This back-up of blood, (and sometimes other fluids), is what causes the swelling.
The most likely cancer that would present as a mass in the arm pit is breast cancer. This is due to lymph node swelling, as a result of breast cancer that has metastasized to lymph nodes in the "tail" of the breast tissue in and near the arm pit.However, before becoming overly concerned about a swelling in the arm pit, check with your physician first. There are many more benign causes than malignant causes.
what kind of infection can cause a swollen lymph node in the left breast
An adenopathy is a swelling or enlargement of the glands, especially the lymph nodes.
swelling of the lymph nodes in the armpit, which can be painful.
Adenosis is a benign swelling, scarring or enlargement of the lymph glands.
of Blister
Inflammatory swelling of one or more lymph nodes
Loss of lymph nodes from surgery on the affected side often causes poor drainage from the arm on that side. This is why there can be hand and arm swelling.