Whole-body 18F-FDG PET/CT scan in a patient with Bladder 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

Under fasting conditions, an intravenous injection of 18F-FDG was administered, followed by rest.
Whole-body PET/CT imaging revealed the following: Brain morphology and structure were normal, with a few punctate low-density shadows in the deep bilateral cerebral regions; FDG uptake showed no significant abnormalities.
The ventricles, sulci, fissures, and cisterns were slightly widened; the ventricles were symmetrical, and midline structures showed no shift.
The eyeballs were normal in shape and outline; retrobulbar structures were clear; the optic nerves were symmetrical; FDG uptake was normal.
The paranasal sinuses showed no thickening of the mucosa, and the sinus walls were intact.
The nasopharyngeal walls showed no thickening; FDG uptake was normal.
The palatine tonsils were symmetrical; FDG uptake was physiological.
The laryngopharynx was normal in shape and structure.
The parotid and submandibular glands were normal in shape and density; FDG uptake was physiological.
The thyroid gland was normal in shape and size, with slightly uneven density; FDG uptake was normal.
No significantly enlarged lymph nodes were observed in the bilateral deep cervical spaces, submandibular region, and submental region.
A large amount of pleural effusion was observed in the right pleural cavity, compressing part of the right lung tissue; increased lung markings were observed in the remaining lungs.
Solid nodules were observed in the apical-posterior segment of the left upper lobe and the anterior-basal segment of the right lower lobe, the largest being approximately 0.5 cm in long diameter, with clear borders; FDG uptake was normal.
A few linear and cystic lucent shadows were also observed in both lungs; FDG uptake was normal.
Slight thickening was observed in part of the left pleura.
No significantly enlarged lymph nodes were observed in the bilateral hilar and mediastinal regions.
The cardiac silhouette was normal.
Calcification of some arterial walls (including coronary arteries) was observed.
Mild bilateral gynecomastia was observed.
Post-bladder cancer surgery, indwelling catheters were observed in the bilateral ureters and renal pelvis, and in the right lower abdominal cavity, communicating with the outside.
A large soft tissue mass was seen in the pelvic cavity, with a maximum cross-sectional area of approximately 15.4*16.4cm.
Its density was heterogeneous, with an average CT value of 33 HU.
Some borders were indistinct, and FDG uptake was unevenly increased (SUVmax=13.6).
The prostate was poorly visualized.
The peritoneum and mesentery in the upper and middle abdomen were slightly thickened unevenly, with mildly increased FDG uptake (SUVmax=1.8).
No enlarged lymph nodes were seen in the abdomen, pelvis, or retroperitoneum.
A large amount of fluid was observed in the abdominal and pelvic cavities, with some tissue structures poorly visualized.
The liver showed no obvious abnormalities in shape and size, with smooth liver margins and no widening of the hepatic fissures.
Plain CT scan showed decreased liver parenchymal density, with an average CT value of 48 HU.
Several cystic low-density shadows were observed within the liver parenchyma, the largest being approximately 1.4 cm in long diameter, with clear borders and normal FDG uptake.
The main portal vein showed no significant widening, and no dilation of intrahepatic or extrahepatic bile ducts was observed.
The gallbladder showed no abnormalities in shape and size, with slightly thickened and roughened gallbladder walls; local FDG uptake was normal.
The pancreas was normal 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, size, density, or FDG uptake.
Both kidneys are normal in shape and size.
Several cystic low-density shadows and slightly high-density nodular shadows are seen in the renal parenchyma, the largest being approximately 3.8 cm in long diameter with clear borders.
FDG uptake is absent.
No widening of the renal pelvis, calyces, or ureters is observed.
No obvious abnormalities are seen on bilateral adrenal gland imaging.
No esophageal dilation is seen, and no obvious thickening or mass is seen in the esophageal wall.
FDG uptake is increased in the lower thoracic segment of the esophagus, SUVmax=3.0.
Gastric distension is poor, and no obvious thickening of the gastric wall is seen.
Mild FDG uptake is seen in parts of the gastric wall, SUVmax=1.9.
Intestinal distension is poor, and no obvious thickening or mass is seen in the intestinal wall.
FDG uptake is physiological.
Multiple punctate and small nodular dense shadows are seen in some thoracic and lumbar vertebrae, some bilateral ribs, the left ilium, both acetabula, both pubic tubercles, and the upper left femur.
FDG uptake is normal.
Mild scoliosis, slight posterior displacement of L2 and L3 vertebral bodies, osteophyte formation at the margins of some vertebral bodies, and calcification of the nuchal ligament; L2/3, L3/4, and L4/5 intervertebral disc bulges, with no abnormalities detected by FDG uptake.
A cystic low-density shadow with a long diameter of approximately 2.1 cm is seen in the sacral canal, with no abnormalities detected by FDG uptake.

Impression

1. Postoperative changes after bladder cancer surgery: a. A large soft tissue mass in the pelvic cavity with unevenly increased FDG metabolism, suggesting tumor recurrence or metastasis. The prostate is poorly visualized; please confirm with pathology. b. Partial uneven thickening of the peritoneum and mesentery in the upper and middle abdomen with mildly increased FDG metabolism, suggesting possible reactive hyperplasia; please follow up to rule out mixed metastases. c. Multiple dense bone shadows throughout the body (see description for details), FDG metabolism normal, suggesting benign bone disease; please follow up. d. Large amounts of fluid accumulation in the abdomen and pelvis, with some tissue structures poorly visualized.

2. a. Chronic inflammatory nodules in both lungs. A few post-inflammatory remnants in both lungs, with air sacs in both lungs. Large amount of pleural effusion on the right side, with partial pulmonary edema in the right lung. Mild thickening of the left pleura. b. Calcification of some arterial walls (including coronary arteries). Mild bilateral gynecomastia.

3. Mild fatty liver, multiple hepatic cysts, no definite space-occupying lesions. Chronic cholecystitis. Multiple renal cysts (some complex).

4. Increased FDG metabolism in some esophageal and gastric walls, considered physiological uptake or chronic inflammatory changes; please follow up with endoscopy.

5. Mild scoliosis with degenerative changes, L2 and L3 vertebral instability. L2-5 intervertebral disc bulge. Sacral canal cyst.

6. A few lacunar infarcts in the deep bilateral brain, mild 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