The ameloblastoma is a benign but aggressive neoplasm of odontogenic origin. 
However, no enamel or hard tissue is formed by the tumor cells. Ameloblastomas 
are infamous for their invasive growth and their tendency to recur. Robinson 
(1937) as a benign tumor that is 'usually unicentric, nonfunctional, 
intermittent in growth, anatomically benign and clinically persistent.' They may 
occur at any age, even though nearly half of the tumors do occur between the 
ages of 20 and 40 years. This is the most common neoplasm affecting the jaws, 
yet only accounts for 1% of all tumors of the maxilla and mandible and 11% of 
all odontogenic tumors. This report presents a case of ameloblastoma involving 
entire ramus and part of body of mandible with resorption of the mesial and 
distal root apices of second molar and distal root of mandibular first molar. 
The lesion extending till the base of mandible surrounding the crown of the 
unerupted third molar resembling the dentigerous cyst. This was surgically 
resected followed by harvesting the contralateral sixth costochondral rib graft. 
How to cite this article: Celur S, Babu KS. Plexiform Ameloblastoma. Int J Clin 
Pediatr Dent 2012;5(1):78-83.