# Osteoid Osteoma of the Calcaneus and Patella: A Report of Two Cases and Review of the Literature

## TL;DR

This paper reports two rare cases of osteoid osteoma in the calcaneus and patella, emphasizing the importance of accurate diagnosis and minimally invasive treatment for successful outcomes.

## Contribution

The novelty lies in highlighting the diagnostic and therapeutic challenges of osteoid osteoma in uncommon locations and advocating for minimally invasive approaches.

## Key findings

- Osteoid osteoma in the calcaneus and patella is rare and can be difficult to diagnose.
- Computed tomography is the most reliable imaging method for diagnosing these lesions.
- Minimally invasive treatment leads to excellent outcomes with minimal complications.

## Abstract

The presence of an osteoid osteoma (OO) in the calcaneus and patella remains an uncommon condition. These lesions can often lead to diagnostic and therapeutic difficulties. Initial assessment and cautious management contribute to excellent results and limited complications.

We report a 20-year-old male with OO of the calcaneus and a 35-year-old male with OO of the patella. The clinical suspicion, in combination with thorough imaging control, can lead to the final diagnosis. Imaging examinations usually reveal a nidus; however, computed tomography remains the gold-standard tool for the detection and diagnosis of lesions. The state-of-the-art therapeutic methods emphasize minimally invasive techniques. The unusual location of these tumors emphasizes the specific need for careful management and minimally invasive treatment, which ultimately contributes to excellent outcomes with minimal adverse effects.