title: Letter: Masked primary (or tertiary) hyperparathyroidism.
mesh_terms: D000236:Adenoma / Q000150:complications; D006801:Humans; D006961:Hyperparathyroidism / Q000175:diagnosis* / Q000209:etiology; D010018:Osteomalacia / Q000150:complications*; D010282:Parathyroid Neoplasms / Q000150:complications