Lower case and ends ‘ean’
An unpaid family member, partner or friend who helps a disabled, ill or older person with the activities of daily living. Do not use it to describe someone who works in a caring job or profession – for that use careworker or their professional title, for example nurse.
Use the lower case except where they start with a name. For example, cancer of the colon, multiple sclerosis, but Parkinson's disease, Alzheimer's disease.
CT scan (computerised tomography scan), then use ‘CT scan’ for subsequent mentions. Also known as CAT scan (computerised axial tomography) – we use CT scan.