Differential diagnosis of cysts of jaws

CYSTS OF JAW

1. Differential diagnosis of cysts of jaws Odontogenic keratocyst: Aggresive type,paresthesia in the jaw along with mobility & displacement of the tooth,radiographically present multilocular radiolucent areas with typical “soap-bubble” appearance. Differential diagnosis: Ameloblastoma,Dentigerous cyst,Residual cyst Eruption cyst: Associated with the erupting deciduous or permanent teeth.The lesion appears as a circumscribed,fluctuant,often translucent swelling of the alveolar ridge over the site of eruption of the teeth. Differential diagnosis: Hematoma, hemangioma , amalgam tattoo, melanoma. Gingival cyst of adult: The cyst is located in the gingival tissue outside the bone.It is slowly enlarging,painless swelling,firm but compressible,fluid filled, “dome- like”swelling on the mandibular or maxillary facial gingiva around the canine-premolar area. Differential diagnosis: Lateral periodontal cyst , periodontal abscess. Lateral periodontal cyst: Associated with lateral root surface of an erupted vital tooth,clinically small,painless soft tissue swelling within or just anterior to the interdental papilae , radiographically ‘Teardrop-shaped ’ radiolucent area. Differential diagnosis: Lateral periodontal abscess,Radicular cyst,Lateral dentigerous cyst,Globulomaxillary cyst. Radicular cyst: Clinically smaller cystic lesion,usually asymptomatic,bony hard or crepatations,rubbery or fluctuate.Radiographically well- defined,unilocular,round shaped radiolucent area at the root apex. Differential diagnosis: Periapical granuloma,Periapical abscess,Traumatic bone cyst Nasopalatine duct cyst: It is a small,painful,fluctuant swelling in the midline of the anterior part of hard palate near the opening of the incisive foramen.Radiographically round or heart- shaprd radiolucent area. Differential diagnosis: Median palatine cyst,Radicular cyst Residual ctst: Asymptomatic,previous history of pain in the tooth,well circumscribed round or ovoid unilocular radiolucency . Differential diagnosis: Primordial cyst,Traumatic cyst,Ameloblastoma (in initial stage/ unilocular ) Calcifying epithelial odontogenic cyst: Frequently in mandibular premolar region,slow growing,painless,non -tender swelling,adjacent teeth may be displaced,well defined or irregular,unilocular or multilocular,calcified foci often found Differential diagnosis: AOT,CEOT,Dentigerous cyst,Ameloblastoma Dentigerous cyst: The cyst encloses the crown of the unerupted tooth & is attached to the neck. Differential diagnosis: Adenomatoid odontogenic tumor,Ameloblastoma,Odontogenic keratocyst,Calcifying epithelial odontogenic cyst Globulomaxillary cyst: Usually asymptomatic,small swelling between maxillary lateral incisor & canine.Radiograph reveals an inverted pear-shaped radiolucent area. Differential diagnosis: Lateral periodontal cyst,Lateral dentigerous cyst,primordial cyst NORTH BENGAL DENTAL COLLEGE & HOSPITAL Department of ORAL MEDICINE & RADIOLOGY