High PRLR expression in parathyroid adenomas may be identified from previous reports of expression profiling of parathyroid tissues reported by us and others [26], [27], and from expressed sequence tag (EST) profiling (Hs.368587) of parathyroid adenoma (973 TPM) as compared to breast tumour (424 TPM) (http://www.ncbi.nlm.nih.gov/UniGene/ESTProfileViewer.cgi?uglist=Hs.368587). The gene discussed is PRLR; the disease is parathyroid gland adenoma.