Re: Groin lymph node biopsy
Pea sized lymph nodes are normal and only become an issue if they begin progressively to grow. They might indicate current infection, or be collateral from a previous infection. Nodes in the groin are especially common, since they drain the whole leg. They can be caused by scrapes to the knee, verrucas on the foot or any other infection. They are not considered abnormal until they are at least 2cm in diameter. Because they are so common, doctors are usually reluctant to biopsy persistent groin nodes, even if lymphoma is suspected following a CT scan (cervical biopsy is more reliable).