The investigators will collect information from patients diagnosed with Gaucher disease and any of the conditions mentioned above (for which the patient is already being monitored). Further information required about their clinical status will be obtained from their past and on-going medical records; this will be done as the participants attend hospital as part of their routine care for Gaucher disease. The information we need for the research is no different from the information which is already recorded and will be recorded in their medical notes when they come to the hospital for their routine care, every 6 months.