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Tonsillar Metastasis From Colon Cancer Detected on 18F-FDG PET/CT Imaging
Yaser M Baghdadi1, Ana Y Valdivia
1From the Nuclear Medicine Division, Department of Radiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY.
Metastatic adenocarcinoma from the colon can spread to the tonsils, even after initial treatment. F-FDG PET/CT scans can help detect these unusual metastatic sites, such as tonsil cancer.
Area of Science:
- Oncology
- Medical Imaging
- Pathology
Background:
- A 54-year-old female smoker with a history of invasive rectosigmoid adenocarcinoma underwent surgical resection and chemotherapy.
- The patient experienced local recurrence and pulmonary metastases, necessitating further treatment.
Observation:
- Follow-up F-FDG PET/CT scan revealed asymmetric hypermetabolism in the tonsils, more pronounced on the right.
- Bilateral tonsillectomy was performed for further investigation.
Findings:
- Pathology confirmed moderately to poorly differentiated adenocarcinoma in the right tonsil.
- The findings were consistent with metastasis from the known primary colonic tumor.
Implications:
- This case highlights the potential for tonsillar metastasis from colorectal adenocarcinoma.
- It underscores the utility of F-FDG PET/CT in identifying uncommon metastatic locations.
- Early detection and diagnosis of metastatic disease are crucial for patient management.
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