Whole-body 18F-FDG PET/CT scan in a patient with Rectal Cancer taken from the PETWB-REP dataset. The following English report (translated from original Chinese) is taken verbatim from the public dataset and has not been modified or otherwise checked for accuracy (see the end for citation).

Findings

After fasting and intravenous injection of 18F-FDG, a whole-body PET/CT scan was performed.
The scan showed: patchy near-cerebrospinal fluid density shadows in the right frontal lobe; a few punctate low-density shadows in the deep cerebral regions bilaterally; FDG uptake was not significantly abnormal.
Some ventricles, sulci, fissures, and cisterns were widened, but local density and FDG uptake were normal; midline shift was not observed.
The bilateral eyeballs showed normal shape and outline; retrobulbar structures were clear; optic nerves were symmetrical bilaterally; FDG uptake was not significantly abnormal.
Mild thickening of the bilateral ethmoid sinuses and right maxillary sinus mucosa was observed; sinus walls were intact.
The right nasopharyngeal wall was slightly thickened; FDG uptake in the nasopharynx was increased (SUVmax = 4.4); the Eustachian tube opening was not narrowed; the infratemporal fossa and pterygopalatine fossa structures were normal; bilateral parapharyngeal spaces were clear; FDG uptake was not abnormal.
The bilateral palatine tonsils were full; FDG uptake was physiological.
The laryngopharynx showed no abnormalities in shape or structure.
No abnormal imaging was observed in the bilateral salivary glands.
Nodular FDG uptake was observed in the left maxillary and mandibular alveolar regions, with an SUVmax of 7.3.
The thyroid gland was normal in shape and size, with a slightly low-density nodule measuring approximately 2.6*1.9cm in the right lobe, with indistinct borders and increased FDG uptake, SUVmax = 26.6.
Multiple lymph nodes were observed in the bilateral deep cervical spaces and submandibular region, the largest with a short diameter of approximately 0.5cm, with no abnormal FDG uptake.
A few punctate shadows were observed in the apical segment of the right upper lobe, and scattered linear and patchy shadows were observed in both lungs, with no abnormal FDG uptake.
The trachea was midline, and the trachea and the lumen of each lobe and segmental bronchus were patent.
No significantly enlarged lymph nodes were observed in the bilateral hilar and mediastinal regions, with no significant increase in FDG uptake.
No pleural thickening was observed bilaterally, and there was no pleural effusion or pneumothorax bilaterally.
The cardiac silhouette was normal.
The esophagus was not dilated, and the esophageal wall was not significantly thickened or swollen, with no increased FDG uptake.
The liver showed no obvious abnormalities in shape and size, with smooth borders and no widening of the hepatic fissure.
The liver parenchyma showed decreased density (CT value approximately 48 HU).
A slightly low-density mass measuring approximately 6.7*5.6 cm was observed in the lower segment of the right anterior lobe of the liver, with relatively clear borders and uneven density.
FDG uptake was increased (SUVmax = 6.5).
The main portal vein showed no significant widening, and the intrahepatic bile ducts in the left medial lobe of the liver were slightly dilated.
The gallbladder showed no abnormalities in shape and size, with no thickening of the gallbladder wall.
Punctate dense shadows were observed in the neck, and FDG uptake was normal.
The pancreas showed no abnormalities in shape, with no obvious abnormal density shadows in the parenchyma.
The main pancreatic duct was not widened, and FDG uptake was normal.
The spleen showed no abnormalities in shape and size, density, or FDG uptake.
Both kidneys showed no abnormalities in shape and size.
A low-density nodule with a long diameter of approximately 0.3 cm was observed in the left kidney, with no obvious abnormalities in FDG uptake.
The renal pelvis, calyces, and ureters showed no widening, and no positive stones were observed within them.
Bilateral adrenal glands showed no abnormalities in morphology or density, and FDG uptake was normal.
Gastric distension was poor, with increased FDG uptake in parts of the gastric wall (SUVmax = 4.1).
Post-rectal cancer treatment: poor bowel preparation, slightly thickened anastomotic wall, increased FDG uptake (SUVmax = 4.1, delayed SUVmax = 4.3).
Dense suture shadows were observed in the anal region, with continuous increased FDG uptake in parts of the intestine (SUVmax = 12.0, delayed SUVmax = 11.5).
Thickened perirectal and presacral fascia showed mildly increased FDG uptake (SUVmax = 2.4, delayed SUVmax = 2.7).
No enlarged lymph nodes were observed in the abdominal cavity, pelvic cavity, or retroperitoneal region, and FDG uptake was normal.
No significant fluid accumulation was observed in the abdominal or pelvic cavities.
The prostate showed no abnormalities in morphology or size, with a transverse diameter of approximately 3.2 cm, calcifications were observed in the parenchyma, and FDG uptake was not significantly increased.
The bladder was poorly filled, but no obvious stones were observed.
Scoliosis was present.
There was mild posterior displacement of the L2 vertebral body and mild anterior displacement of the L5 vertebral body, with some vertebral body margin osteophytes.
Nuchal ligament calcification was also present.
Increased FDG uptake was observed in the right acromioclavicular joint, with SUVmax = 2.8.

Impression

1. a. Post-rectal cancer treatment: Slightly thickened anastomotic wall with increased FDG metabolism; thickening of the perirectal fascia and presacral fascia with mildly increased FDG metabolism. These are all likely post-treatment changes. Please follow up with colonoscopy and enhanced MRI to rule out recurrence. b. Post-operative changes in the anal region: Continuous increased FDG metabolism in parts of the intestine, suggesting physiological uptake or chronic inflammation. Please follow up with endoscopy.

2. A mass in the lower segment of the right anterior lobe of the liver with increased FDG metabolism, suggesting a neoplastic lesion, possibly metastatic or primary. Please analyze comprehensively based on clinical findings and enhanced MRI images. Mild fatty liver. Slight dilation of the intrahepatic bile duct in the left medial lobe of the liver. Gallstones are possible; please use ultrasound.

3. A slightly low-density nodule in the right lobe of the thyroid gland with increased FDG metabolism, suggesting a possible adenoma. Ultrasound follow-up is recommended to rule out malignancy; biopsy may be necessary. Reactive hyperplasia of bilateral cervical lymph nodes.

4. Chronic inflammation and remnants in both lungs.

5. Changes characteristic of chronic gastritis; please follow up with gastroscopy.

6. Prostatic calcifications. Possible left renal cyst or small vessel leiomyolipomas.

7. Scoliosis with degenerative changes. L2 and L5 vertebral instability. Right acromioclavicular arthritis.

8. Chronic nasopharyngeal inflammation is highly likely; please consult a specialist. Minor inflammation of the bilateral ethmoid sinuses and right maxillary sinus. Inflammation of the left maxillary and mandibular alveolar regions.

9. Right frontal lobe softening lesion, bilateral deep lacunar infarcts, age-related brain changes.

This case is from PETWB-REP, a curated dataset of whole-body 18F-FDG PET/CT scans and corresponding radiology reports from 490 patients with a broad spectrum of malignancies. The data were retrospectively collected from patients who underwent clinically indicated whole-body 18F-FDG PET/CT scans at the Shanghai Universal Medical Imaging Diagnostic Center between 2021 and 2024.

License: Creative Commons Attribution 4.0 International (CC BY 4.0)

Citation:
Xue, L., Feng, G., Wenbo, Z., Zhang, Y., Li, L., Wang, S., Peng, L., Peng, S., & Gao, X. (2026). PETWB-REP: A Multi-Cancer Whole-Body FDG PET/CT Dataset with Corresponding Radiology Reports [Data set]. Zenodo. https://doi.org/10.5281/zenodo.18670487