Case Author(s): Jayson R. St. Jacques, M.D. and Tom R. Miller, M.D., Ph.D. , 10/18/02 . Rating: #D3, #Q3

Diagnosis: Gastric Lymphoma

Brief history:

49 year old woman with abnormal upper endoscopy.


Coronal FDG-PET images.

View main image(pt) in a separate image viewer

View second image(pt). Coronal FDG-PET images one year later.

View third image(ct). Axial abdominal CT images before and after therapy.

Full history/Diagnosis is available below

Diagnosis: Gastric Lymphoma

Full history:

49 year old woman with initial presentation of dyspepsia, followed by upper endoscopy and biospy of ulcerated mass. Biospy demonstated B-cell lymphoma. Initial PET scan was for staging, second PET scan was for evaluation of response to chemotherapy.


3.0 mCi F-18 Fluorodeoxyglucose i.v.


The initial FDG-PET scan (9-26-01) demonstrates lymphoma confined to the stomach without focal or distant metastatic disease. The differential diagnosis without a known primary malignancy includes adenocarcinoma, lymphoma, active inflammatory/infectious gastritis, and possibly sarcoid or metastatic disease.

The repeat FDG-PET scan (8-20-02) demonstrates complete resolution of abnormal uptake after therapy. Benign bilateral muscle uptake in the lower neck and upper chest was noted.


FDG-PET scanning is excellent for evaluation of lymphoma.

FDG-PET is a useful tool in the treatment of lymphoma for initial staging and post-therapy evaluation. FDG-PET can also be utilized during therapy for early assessment of the response to therapy.

ACR Codes and Keywords:

References and General Discussion of PET Tumor Imaging Studies (Anatomic field:Gasterointestinal System, Category:Neoplasm, Neoplastic-like condition)

Search for similar cases.

Edit this case

Add comments about this case

Return to the Teaching File home page.

Case number: pt084

Copyright by Wash U MO