<prompt> Potts puffy tumor is seen inVertebraeParanasal sinusBones forming ankle jointNeck  <response>: Ans. is b i.e., Paranasal sinus Complications of sinusitis Complications in properly managed sinusitis are uncommon. Complication of sinus infection may be1 Local:- Mucocele mucopyocele, mucous retention cyst, osteomyelitis.2 Orbital :- Periorbital cellulitis, orbital cellulitis, orbital abscess, subperiosteal abscess, cavernous sinus thrombosis, superior orbital fissure syndrome, orbital apex syndrome, edema of eye lids, retrobular neuritis with impaired vision.3 Intracranial :- Intracranial abscess Epidural, subdural, parenchymal, meningitis, seizure, sepsis, focal neurological deficit.4 Descending infections :- Pharyngitis, laryngitis, tonsillitis, tracheobronchitis, otitis media.5 Systemic :- Toxic shock syndrome very rare Osteomyelitis is more common in frontal sinusitis. Osteomyelitis of frontal bone can cause subperiosteal abscess known as Potts puffy tumor. Orbital cellulitis is particular common in ethmoid sinusitis. Cavernous sinus thrombosis and intracranial complications are more common with sphenoid sinusitis. 