AUTHOR=Alhaskawi Ahmad , Zhou Haiying , Dong Yanzhao , Lai Jingtian , Wang Zewei , Hasan Abdullah Ezzi Sohaib , Goutham Kota Vishnu , Hasan Abdulla Hasan Abdulla Mohamed , Sun Zhenyu , Lu Hui TITLE=The first case report of an intraosseous epidermoid cyst in the distal phalanx of the index finger with infection resulting in single clubbing finger: A case report and review of the literature JOURNAL=Frontiers in Surgery VOLUME=9 YEAR=2023 URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2022.1008358 DOI=10.3389/fsurg.2022.1008358 ISSN=2296-875X ABSTRACT=

An intraosseous epidermoid cyst at the distal phalanx of the index finger is extremely rare. These cysts are asymptomatic unless ruptured, severely infected, or transformed into malignant squamous cell carcinoma. We present a case of a single clubbing finger in an adult diagnosed with an intraosseous epidermoid cyst in the distal phalanx of the left index finger with no history of pulmonary or cardiovascular diseases. Preoperative MRI showed an expansile lytic lesion with a sclerotic margin. Histopathological examination indicates that there is keratinous cell debris in the cyst with a wall of stratified squamous epithelium, which was the key to the correct diagnosis of an intraosseous epidermoid cyst. Written informed consent was obtained from the patient for publication of this case report and any accompanying images.