HIDS: hyperImmunoglobulinemia D; MVK:  mevalonate kinase deficiency; TRAPS: tumor necrosis factor receptor-associated syndrome; CAPS: cryopyrin-associated periodic syndromes; PFAPA: periodic fever, aphthous stomatitis, pharyngitis, cervical adenitis. Here, MVK is linked to hyperinsulinemic hypoglycemia, familial, 4.