Currently two main categories of fungal sinusitis are described; invasive and noninvasive. The invasive type can be; 1. Acute, fulminant, 2. Chronic, indolent, and 3. Granulomatous type. The noninvasive types are more common of which Allergic fungal sinusitis is commonly present in almost all extensive polyposis cases in India. The other noninvasive type is mycetoma or fungal ball, which carries the best prognosis if treated surgically well. The acute invasive fugal infection of sinuses by mucormycosis is an aggressive opportunistic infection caused by phycomycetes, first described in 1885 by Paltauf. The genera most commonly causing mucormycosis are Mucor or Rhizopus. Sinus and nasal infection by mucor causes orbitocerebral spread. Other organs involved are the lungs, GI tract and skin. Rhinorbito-cerebral mucormycosis has a mortality rate as high as 50%, since they occur in immunocompromised state like uncontrolled diabetes, metabolic acidosis, chronic renal failure, AIDS, leukemia, etc.