Dentigerous cysts are one of the common cysts of the jaws. Bilateral dentigerous cysts generally occur in association with a developmental syndrome or systemic diseases. Bilateral dentigerous cyst in absence of a syndrome is rare and to date only 18 cases have been reported. After reviewing the literature, no case reports of dentigerous cysts involving all the quadrants of the jaws were reported. As far as our knowledge, this is the first case to be reported.

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Dentigerous cysts are one of the common cysts of the jaws and are associated with the crowns of permanent teeth, most frequently with impacted mandibular third molars. Bilateral dentigerous cysts generally occur in association with a developmental syndrome or systemic diseases. Bilateral dentigerous cysts in absence of a syndrome is a rare condition. There are only 18 cases reported in the literature till date (Dinkar et al. J Indian Soc Pedod Prev Dent 25:56-59, 2007). There are no cases reported with multiple dentigerous cyst involving all the four quadrants.

Aneurysmal bone cyst (ABC) is rare benign lesions of bone which are infrequent in craniofacial skeleton. ABC’s are characterized by rapid growth pattern with resultant bony expansion and facial asymmetry. We describe a case of ABC in a 25 year old male patient affecting the body of the mandible with expansion and thinning of the buccal and lingual cortical plates. Treatment consisted of surgical curettage of the lesion. A one year follow- up showed restoration of facial symmetry and complete healing of the involved site.