Inclusion Criteria:  Patients undergoing biopsy or excision of more than one lymph node as part of their routine clinical care within Gloucestershire Hospitals NHS Foundation Trust. Patients undergoing lymphadenectomy as part of routine treatment  Exclusion Criteria:  Patients requiring biopsy of only one lymph node Patients unable to consent to the study due to communication difficulties Patients unable to consent to the study due to lack of capacity