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How can a CT scan show if a lymph node is cancerous or not?

3 doctors weighed in
Dr. Kris Gast
Radiation Oncology
2 doctors agree

In brief: CT , nodes and CA

CT shows anatomy.
Lymph nodes usually don't show up or are very small. When the radiologist can see and measure a lymph node it than becomes suspicious for cancer. If it is greatly enlarged than it is more likely to be Cancer. A PET scan will show if the lymph node is active ie growing faster than normal tissue. If there is a doubt a biopsy can be done. All scans have a resolution of size dectable

In brief: CT , nodes and CA

CT shows anatomy.
Lymph nodes usually don't show up or are very small. When the radiologist can see and measure a lymph node it than becomes suspicious for cancer. If it is greatly enlarged than it is more likely to be Cancer. A PET scan will show if the lymph node is active ie growing faster than normal tissue. If there is a doubt a biopsy can be done. All scans have a resolution of size dectable
Dr. Kris Gast
Dr. Kris Gast
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