Case Author(s): Edward Pinkus, M.D. and Tom R. Miller, M.D., Ph.D. , 2/12/02 . Rating: #D., #Q.

Diagnosis: schwannoma

Brief history:

69 year-old woman with a 3.0 x 2.5cm left paraspinal mass senn on chest CT.


Coronal images of the whole-body FDG-PET.

View main image(pt) in a separate image viewer

View second image(pt). Selected images of the whole-body FDG-PET.

View third image(ct). ct of the chest.

Full history/Diagnosis is available below

Diagnosis: schwannoma

Full history:

69 year-old female with 3.0 x 2.5 cm left paraspinal mass. Diagnostic considerations include fibrous tumor, bronchogenic carcinoma and neurogenic tumor.


14.7 F-18 FDG.


FDG-PET: Intensely incresed activity in the left paraspinal region at the T-6 level, corresponding to the abnormality seen on the recent CT, suggestive of malignancy.

CT of the chest: 3.0 x 2.5 cm left paraspinal smoothly marginated mass without osseous changes or neural foraminal widening. The differential diagnosis includes fibrous pleural tumor, lung cancer and, less likely, neurogenic tumor.


Surgical excision was performed with the patholgy interpreted as schwannoma.

This is an example of high fdg uptake in a benign tumor. Other causes of high fdg uptake in the chest of non-malignant etiology: granulamotous inflamation, such as sarcoidosis, histoplasmosis and infectios processes such as bacterial pneumonia.

ACR Codes and Keywords:

References and General Discussion of PET Tumor Imaging Studies (Anatomic field:Lung, Mediastinum, and Pleura, 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: pt073

Copyright by Wash U MO