The nocturnal (overnight) paediatric oximetry test is used to screen for sleep apnea in children. It records drops in blood oxygen levels during sleep. An additional test may be required to make a diagnosis (polysomnography).
Breast cancer: This is a malignant tumour made up of many cancerous cells. It should be noted that breast cancer is not the most common cause of breast pain, as patients of this disease are often asymptomatic.