Fig 2From: Management delays in patients with squamous cell cancer of neck node(s) and unknown primary site: a retrospective cohort studyFlow chart of patient investigations for head and neck malignancies of unknown primaries. Indicated are the numbers of patients receiving each investigation in brackets. PSMI: Primary site of malignancy identified. This is the number of patients for which the primary was identified by the corresponding diagnostic test. PSMC: Primary site of malignancy confirmed. This is the number of patients for which the current test confirmed a previously identified lesionBack to article page