Hi
Lymph nodes in the neck can get enlarged due to various reasons like infection, inflammation, cancers etc..... the most common being infection.
The lymph node being cancerous or not depends on
the size, consistency of the nodes and the number of groups involved along with presence of other symptoms and signs such as fever,
weight loss,
anemia, enlargement of abdominal organs like liver,
spleen etc.
After looking into these signs and symptoms, we go for blood investigations,
Mantoux test, X ray, Lymph node aspiration/
biopsy (if needed ) to arrive at a diagnosis.
So it`s better that you speak to your doctor again and discuss with him regarding the suspected diagnosis and about the results of the investigations done.
Before jumping into conclusions and getting worried, please speak to your doctor.
Wish your son good health.
Dr. Sudha Shree.V