The Lund-Mackay score is a widely used method for radiologic staging of chronic rhinosinusitis 1.
- 0 (no abnormality)
- 1 (partial opacification) or
- 2 (complete opacification)
The ostiomeatal complex is assigned a score of either 0 (not obstructed) or 2 (obstructed).
The sinuses are grouped into:
- frontal sinus
- anterior ethmoidal cells
- posterior ethmoidal cells
- maxillary sinus
- sphenoid sinus
- ostiomeatal complex
Each side is graded separately. A combined score of up to 24 is possible. Of note, an aplastic (absent) frontal sinus receives a score of 0.
The method is intentionally simplistic, for the sake of minimising interobserver variability and expediting its application 2. Thus, it lends itself to application by non-radiologists and in clinical studies 1. Despite its simplicity, it correlates well with disease severity, extent of surgery, and complication rates, even independent of the extent of surgery 3.
History and etymology
It is named after its developers, British rhinologists Valerie J Lund and Ian S Mackay.
- 1. Lund VJ, Mackay IS. Staging in rhinosinusitus. Rhinology. 31 (4): 183-4. Pubmed
- 2. Oluwole M, Russell N, Tan L, Gardiner Q, White P. A comparison of computerized tomographic staging systems in chronic sinusitis. Clinical otolaryngology and allied sciences. 21 (1): 91-5. Pubmed
- 3. Hopkins C, Browne JP, Slack R, Lund V, Brown P. The Lund-Mackay staging system for chronic rhinosinusitis: how is it used and what does it predict? Otolaryngology--Head and Neck Surgery. 137 (4): 555-61. doi:10.1016/j.otohns.2007.02.004 - Pubmed