A case of radicular cyst arising from deciduous tooth

The radicular cysts are the most common cysts of the jaws, but these arising from deciduous teeth are very rare.The patient was a 7-year-old boy. A was a tooth stump. X-ray examination indicated a cyst-like radiolucency at the apex of the tooth (A) and displacement of the impacted teeth (12) superior-posteriorly. Histopathologically, the cyst wall covered externally with a layer of connective tissue infiltrated inflammatory cells was lined with stratified squamous epithelium.The differential diagnosis between these two cysts, the radicular cyst arising from deciduous tooth and the dentigerous cyst from succedaneous permanent tooth, is difficult. Diagnosis; A radicular cyst arising from deciduous tooth (A) based on clinical and histopathological findi