Nodal shape (S/L) and its combination with size for assessment of cervical lymphadenopathy: Which cut-off should be used?

Tin Cheung Ying, Anil Ahuja, Fiona Brook, Brian Brown, Constantine Metreweli

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)


The short axis to long axis (S/L) ratio is commonly used to assess cervical lymphadenopathy; however, the cut-off value used has been limited to 0.5. The accuracy of the combination of S/L ratio and nodal size has not been documented previously. We evaluated 1143 normal cervical nodes from 95 healthy subjects, and 1441 nodes from 290 patients with proven cervical lymphadenopathy. The optimum cut-off value of the S/L ratio was determined in different regions of the neck: submental (0.5), submandibular (0.7), parotid (0.5), upper cervical (0.4), middle cervical (0.3) and posterior triangle (0.4). In the submandibular and parotid regions, the combination of the S/L ratio and short axis shows substantial improvement in diagnostic accuracy when compared to the S/L ratio alone.
Original languageEnglish
Pages (from-to)1169-1175
Number of pages7
JournalUltrasound in Medicine and Biology
Issue number8
Publication statusPublished - 1 Oct 1999


  • Cervical lymphadenopathy
  • S/L ratio
  • Shape
  • Size
  • Ultrasound

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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