Retrospectively diagnosed familial hypocalciuric hypercalcaemia following total parathyroidectomy in an asymptomatic patient.

This case report provides a classical presentation of the rare, benign disorder of FHH. It highlights the negative outcomes that may result from misdiagnosis of this condition as PHPT. Biochemical investigations play an integral role in differentiating these conditions. Effective clinician-laboratory communication is crucial for optimal patient outcomes.