# A Rare Case of Intracranial Extension of Ethmoidal Sinus Juvenile Psammomatoid Ossifying Fibroma

## TL;DR

This paper presents a rare case of a benign bone tumor in a teenager that extended into the skull, highlighting the importance of accurate diagnosis and complete surgical removal.

## Contribution

The novelty lies in reporting a rare intracranial extension of JPOF in a young patient, emphasizing diagnostic and treatment challenges.

## Key findings

- JPOF can rarely extend intracranially despite being benign.
- Complete surgical resection is crucial to prevent recurrence.
- Accurate differentiation from other fibro-osseous lesions is essential for proper management.

## Abstract

Juvenile psammomatoid ossifying fibroma (JPOF) is a type of fibro-osseous lesion in which normal bone is replaced by fibrous tissue. Most commonly, it involves the nasal sinuses or orbital bone. It is very important to differentiate it from other fibro-osseous lesions because these lesions have overlapping clinical features. Even though it is a benign condition, it is locally aggressive and rarely extends intracranially. A complete surgical resection is the key to avoid recurrence. We are presenting a case of JPOF in a 16-year-old boy with a large tumor involving the ethmoidal sinuses with large intracranial component.