<Table> <Tr> <Th_colspan="2"> Rickets </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> X-ray of a two - year - old with rickets, with a marked bowing of the femurs and decreased bone density </Td> </Tr> <Tr> <Th> Pronunciation </Th> <Td> <Ul> <Li> / ˈrɪkɪts / </Li> </Ul> </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Pediatrics </Td> </Tr> <Tr> <Th> Symptoms </Th> <Td> Bowed legs, stunted growth, bone pain, large forehead, trouble sleeping </Td> </Tr> <Tr> <Th> Complications </Th> <Td> Bone fractures, muscle spasms, abnormally curved spine, intellectual disability </Td> </Tr> <Tr> <Th> Usual onset </Th> <Td> Childhood </Td> </Tr> <Tr> <Th> Causes </Th> <Td> Diet without enough vitamin D or calcium, dark skin, too little sun exposure, exclusive breastfeeding without supplementation, celiac disease, certain genetic conditions </Td> </Tr> <Tr> <Th> Diagnostic method </Th> <Td> Blood tests, X-rays </Td> </Tr> <Tr> <Th> Differential diagnosis </Th> <Td> Fanconi syndrome, scurvy, Lowe syndrome, osteomalacia </Td> </Tr> <Tr> <Th> Prevention </Th> <Td> Vitamin D supplements for exclusively breastfeed babies </Td> </Tr> <Tr> <Th> Treatment </Th> <Td> Vitamin D and calcium </Td> </Tr> <Tr> <Th> Frequency </Th> <Td> Relatively common (Middle East, Africa, Asia) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Rickets </Th> </Tr>

The name of a condition caused by an abnormally low level of calcium in the blood is