can someone help me with this? & how accurate is a PET Scan?

HISTORY: Initial staging mucoepidermoid carcinoma

TECHNIQUE: The patient received intravenous injection of 13.38 mCi
F18-FDG and skull base to midthigh imaging was performed. Images were
reconstructed with iterative reconstruction. A skull base to midthigh
non-contrast CT scan was performed and used for attenuation correction.
Blood glucose level was 81 mg/dl.

Incubation time: 45 mins

COMPARISON: 5/29/2025 MRI

FINDINGS:

Mediastinal blood pool activity: SUV Max 1.7

Liver background activity: SUV Max 1.9

There is prominent soft tissue in the right hard palate and
pterygopalantine fossa demonstrating mild hypermetabolic activity up to
an SUV max of 5.3. There is some soft tissue extension into the right
maxillary sinus. The mass is difficult to measure on the low-dose CT and
better measured on the diagnostic MRI and CT neck although approximately
5.8 x 3.4 cm with an SUV max of 5.3.

There is no avid adenopathy.

There is no lung nodule. There is no adenopathy in the chest.

There is no uptake above background in the liver. There is no adrenal
nodule. There is no abdominal or pelvic adenopathy.

There is no avid disease in the lower extremities.

IMPRESSION:
1. Hypermetabolic mass in the right hard palate and right
pterygopalatine fossa. No distant avid metastatic disease.