Swollen lymph nodes: Some leukemias spread to lymph nodes. Swollen nodes may be
seen or felt as lumps under the skin in certain areas of the body (such as on the sides of
the neck, in underarm areas, above the collarbone, or in the groin). Lymph nodes inside
the chest or abdomen can also swell, but these can only be seen on imaging tests, such as
CT or MRI scans.
In infants and children, lymph nodes often get bigger when they are fighting an infection.
An enlarged lymph node in a child is much more often a sign of infection than leukemia,
but it should be checked by a doctor and followed closely.