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Blood-tinged post-nasal drip is a rare manifestation of paranasal sinus disease. Although the presence of such a symptom would intuitively prompt suspicion of malignancy, no previously published study has addressed this issue.
One hundred and ninety-three patients with paranasal sinus lesions, who had undergone endoscopic sinus surgery for treatment or biopsy, were prospectively recruited. Their clinical information was collected and analysed.
In patients without blood-tinged post-nasal drip, 177/181 (97.8 per cent) had chronic paranasal sinusitis and fungal sinusitis. However, in patients who presented with this symptom, six of 12 (50 per cent) were diagnosed with other conditions. The difference was statistically significant (Fisher's exact test, two tails, p < 0.001). In patients with blood-tinged post-nasal drip, diagnoses other than chronic paranasal sinusitis and fungal sinusitis were found more frequently in older males.
The chance of diagnoses other than the usual sinusitis increased significantly in patients with paranasal sinus diseases who presented with blood-tinged post-nasal drip, especially in older males.
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