Actinic keratosis (AK) (also called solar keratosis or sun spots ) is a common precancerous skin condition caused by excessive exposure to ultraviolet light. Skin cancer â the abnormal growth of skin cells â most often develops on skin exposed to the sun.
1 A rare cause of axillary swelling may be breast cancer or lymphoma. 2  The lymph nodes in the groin (femoral or inguinal lymph nodes) may swell from an injury or infection in the foot, leg, groin, or genitals.3  In rare cases, testicular cancer, lymphoma, or melanoma may cause a lump in this area. A rare cause of axillary swelling may be breast cancer or lymphoma. 2  The lymph nodes in the groin (femoral or inguinal lymph nodes) may swell from an injury or infection in the foot, leg, groin, or genitals.
The lymph nodes swell, causing the nodes to enlarge, forming a lump and tenderness in the groin area. These lymph nodes in the groin area are called inguinal lymph nodes and they are formed as tissues that filter the lymphatic fluids and bacteria travel through the body. Lymph nodes play a critical role in the immune system and they can swell in the groin area due to different causes. 1  Infection. 2  Adverse drug reaction. 3  Lymphedema. 4  Hernia. 5  Cancer. 6  Testicular torsion. 7  Hydrocele.