Occurrence of ameloblastoma within a dentigerous cyst

OralSURGERY

Ora MEDICINE AND&d

PAiHOLOGY

VOLUME

24

NUMBER

2

AUGUST,

1967

Operative oral surgery

Occurrence of ameloblastoma within a dentigerous cyst Report

of a case

T

hc tendency for ameloblastomas to dewlop within clentigerous cysts was tepoHcvl mow than 30 years ago and has been well documented many times since. Of all the tumors and cyst,s fount1 in ant1 around the maxilla and mancliblc, only about 1 per cent will bc fount1 to be amcloblastomas. The occur~~~~~ of I)rolifrwting neoplastic epithelial cells differentiating into ameloblastoma is mow frequent in the ctentigwous cyst t1ia.n in any other odontogcnic cyst,. No accurxtr figures coultl bc found, hut scwral authors have stated that the rate oi’ occurwnce of this phenomenon is high antd it is thought that a consitlcrxhle nnmbc~* of t,hc ;rmeloblastomas wiginatc in this way. It is important, thcrefow, to make a cwrwct diagnosis, bad on micrwcopic c~xaniinatiori of swial sections of all tissues rwnovetl. It is important also to priat’orm a total enucleation oi’ wei*y tlentigwous cyst, with close follow-up. Tt is the follom-up scrwtiny that is to 1~ cmphnsixctl in the case that t’ollows,

147

Pig. 1. Periapical fil~ns taken in Juue, l!%i, illustrating rOOt Of fiJ%t mOk$r alld UJlWUpted SWoJlt~ ad third rrJol;trs.

original

lwion

with loss of distal

Pi!/. 2. Immediate

postoperative

surgical

defect

(August,

1957 ).

Fig. Y. Radiograph taken in September, 1958, 13 months postoperat.ively, filling-in of entire defect except for small arca at alveolar crest.

slwws

excellent

150

Hutton

O.K. 0.11. SC0.1.‘. .\ufllst,

1967