computed tomography (CT). Plain skiagram is relatively non-sensitive mode of investigation for CRS and hence its usage for establishing a diagnosis is debatable except to rule out suspected complications and cases of acute sinusitis.2 However, it can be used as a screening tool in the beginning where CT scan is not easily accessible or not affordable by the patient. In such a situation, CT scan may be advised if the patient does not respond to medical management of 3 months. The CT scan may be contrast-enhanced but both coronal and axial sections should be preferably obtained. This may be followed by a diagnostic proof puncture. The returning fluid after the wash may give an indication about the nature of the disease and differentiate allergic rhinosinusitis from CRS.

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