TABLE 1.

Patients with incidentaloma in the head or in the neck on FCH PET/CT performed for prostate cancer staging or restaging benign tumours

No.	Age	Prostate cancer setting for FCH PET/CT	Incidental FCH uptake in head and neck region	Diagnostic modality(ies) for characterisation
1.	78	Biochemical recurrence under HT	Pituitary	MRI: Macroadenoma of pituitary gland
2.	64	Biochemical recurrence after HT	Pituitary	MRI: Residual pituitary adenoma in the right side of sella turcica
3.	81	Biochemical recurrence after prostatectomy, under HT	Pituitary	Post-surgical histology: non-functioning pituitary adenoma
4.	72	Initial staging	Frontal lobe	MRI: Meningioma in the anterior cranial fossa
5.	70	Biochemical recurrence, under HT	Between cerebellum and medulla	MRI: Meningioma at the level of foramen magnum on the right side
6.	56	Initial staging	Behind the left thyroid lobe	Serum PTH: 160 ng/L, ultrasonography and 99mTc-SestaMIBI/123I scintigraphy: recurrent parathyroid adenoma at the same location
7.	75	Biochemical recurrence after high intensity focused ultrasound, no HT	Behind the left thyroid lobe	Serum PTH: 134 ng/L, calcemia: 2.6 mmol/L, normal serum calcidiol
8.	52	Biochemical recurrence after prostatectomy, under HT	Left thyroid lobe	Ultrasonography: multinodular thyroid gland. Cytology of the target nodule: thyroid adenoma

HT = hormonal treatment; PTH = parathyroid hormone; MRI = magnetic resonance imaging