Table 1 Study eligibility criteria

Inclusion criteria

- Age 18 years or older

- Patients with PHPT needing parathyroidectomy

- Biological tests confirming PHPT diagnosis (elevated serum PTH and calcium levels)

- Negative pregnancy test upon inclusion in women of childbearing age

- Patients with health care insurance

- Signed informed consent

Exclusion criteria

- Known allergy for MIBI or FCH or one of its excipients

- Pregnant or breastfeeding women

- Previous history of parathyroid surgery

- Patients with multiple endocrine neoplasia type 1 (MEN1)

- Any medical conditions or associated psychopathology that may compromise patient’s ability to participate in study

- Patient deprived of freedom or under guardianship.