The mean serum PTH was 165.14 ± 90.26 pmol/L (range: 46–263 pmol/L), which declined rapidly after surgery in 3 patients (mean: 1.38 ± 1.1 pmol/L, range: 0.3–1.5 pmol/L) but remained high in one patient (147.5 pmol/L) who presented with multiple lymphadenopathies in the neck. This evidence concerns the gene PTH and Lymphadenopathy.