<prompt> Potts puffy tumour is related to:Infected cell in middle turbinateTuberculous sinusitisPyogenic infection of frontal sinusCavernous sinus thrombosis  <response>: Potts puffy tumour is a complication of pyogenic infection of frontal sinus. Pus collects under the periosteum on the anterior surface of the frontal sinus with associated oedema of skin and subcutaneous tissues. 