Incidental Detection of Sinonasal Inverted Papilloma With 68Ga-FAPI PET/CT in a Patient With Esophageal Cancer

Role of 68Ga-FAPI-04 PET/CT in the Initial Staging of Esophageal Cancer

AIM

To investigate the clinical value of 68Ga-FAPI-04 PET/CT for initial staging of esophageal cancer.

METHODS

A total of 44 newly diagnosed patients with esophageal cancer were included in the analysis on the basis of postoperative pathology or clinical and radiologic follow-up.

RESULTS

All primary lesions showed increased 68Ga-FAPI-04 uptake, with an SUVmax of 14.92 ± 6.91. A total of 561 lymph nodes were verified by surgery (507) or clinical and radiologic follow-up (54), of which 92 lymph nodes were diagnosed as showing metastases. Seventy-five lymph nodes with metastases showed positive findings on 68Ga-FAPI-04, with a diameter of about 1.06 ± 0.53 cm and SUVmax of 8.10±4.71. The sensitivity, specificity, accuracy, positive predictive value, and negative predictive value for lymph node metastasis detection were 81.5%, 99.3%, 96.6%, 96.2%, and 96.5%, respectively.

CONCLUSION

68Ga-FAPI-04 PET/CT showed good diagnostic performance in detecting lymph node metastases of esophageal cancer.

Increased 68Ga-FAPI Uptake in Active Atherosclerotic Plaque

ABSTRACT

A 67-year-old man with esophageal cancer was included in a clinical trial of a 68Ga-FAPI PET/CT study on tumors (ChiCTR2100044131). Increased tracer uptake was noted in the esophageal cancer with esophagitis. In addition, active coronary atherosclerotic plaque also revealed increased FAPI activity.

Increased 68Ga-FAPI Activity in Chondrosarcoma of Nasal Cavity

ABSTRACT

Chondrosarcoma is a rare entity tumor, which mainly appears in long bones and pelvic bones, but rarely in nasal cavity. Herein, we report the 68Ga-FAPI PET/CT findings in a 54-year-old man with chondrosarcoma of nasal cavity.

Increased 68Ga-FAPI Uptake in Facet Joint Osteoarthritis in a Patient With Esophageal Cancer

ABSTRACT

A 69-year-old man presented with newly diagnosed esophageal cancer was enrolled in our clinical trial of 68Ga-FAPI PET/CT study in tumors. Increased tracer uptake was noted in esophageal cancer. In addition, the facet joint osteoarthritis of T7/8 vertebrae also revealed elevated 68Ga-FAPI uptake.

Increased 68Ga-FAPI Uptake in Sacral Chordoma

ABSTRACT

A 47-year-old woman presented with low back pain for 2 months. Her CT scan showed a soft tissue mass in S3 to S4 vertebral bodies. The patient was subsequently enrolled in our 68Ga-FAPI clinical trial on tumors (ChiCTR2100044131). Increased tracer uptake was noted in the sacrum. Postoperative pathology confirmed the diagnosis of sacral chordoma accordingly.

Orbital Granulomatous Inflammation Mimicking Malignancy on 68Ga-FAPI PET/CT

ABSTRACT

A 31-year-old man presented with a left orbital mass for 3 months traumatic enucleation of the left eye. On 68Ga-FAPI PET/CT images, the lesion presented as a soft tissue mass with irregular shape, filling the left orbital cavity and showing intense FAPI uptake. Based on imaging findings, a malignancy was suspected. However, the orbital mass was diagnosed as granulomatous inflammation by pathological biopsy.

Esophagitis Mimicking Esophageal Cancer on 68Ga-FAPI PET/CT

ABSTRACT

A 69-year-old man presented with dysphagia for 6 months. Endoscopic biopsy showed no sign of malignancy, but enhanced chest CT revealed thickening of the esophageal wall, which was considered likely a potential malignancy. The patient subsequently was enrolled in our clinical trial of 68Ga-FAPI study in tumors. Intense 68Ga-FAPI activity was noted in the thickened esophagus. However, repeated endoscopic biopsies and relief of symptoms after drug treatment rendered a diagnosis of Candida albicans esophagitis.