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Introduction: Invasive fungal rhinosinusitis is an aggressive, destructive process most commonly affecting immunocompromised hosts with mortality rate of approximately 60-80%., Aim of Study: The authors present a child's recovery of orbital phlegmone due to acute exacerbation of chronic fungal pansinusitis. They call the attention to the possibility of ever more frequent fungal sinusitis in our country., Methods: Retrospective case report of an 8 years old boy presented with photos., Results: The recovery was promoted by supposing the chance of fungal origin in time. No orbital abscess was found by surgery despite of typical clinical appearance and MRI results. After beginning of antibacterial treatment and functional endoscopic sinus surgery (FESS) the even worsening clinical status of orbital phlegmone raised the possibility of fungal origin, which was verified by mycological examination. The antimycotic treatment, which had been started in time was followed by complete recovery. Due to scarring in the medial rectus muscle, diplopia was the only complication which needs further ophthalmological controls., Conclusions: Supposition and verification of chance of fungal origin is essential in cases of chronic inflammation of paranasal sinus and/or their complications for complex recovery.