has part has part has_part realized in realized in metabolic process disease course Genetic renal tubular disease Primary hypomagnesemia with secondary hypocalcemia orphanet Hypomagnesemia caused by selective magnesium malabsorption ICD10:E83.4 OMIM:602014 PHSH HOMG1 Intestinal hypomagnesemia with secondary hypocalcemia Hypomagnesemia intestinal type 1 Primary hypomagnesemia with secondary hypocalcemia (PHSH) is a form of familial primary hypomagnesemia (FPH, see this term), characterized by severe hypomagnesemia and secondary hypocalcemia associated with neurological symptoms, including generalized seizures, tetany and muscle spasms. PHSH may be fatal or may result in chronic irreversible neurological complications. HSH