Abstract
A follicular cyst associated with a permanent tooth in the region of the jaws, is frequently encountered, but one originated from deciduous tooth is very rare.We presented a case of a 5-month-old infant with a follicular cyst of the first deciduous molar. The patient visited our hospital because of gingival swelling in the deciduous molar region of the left mandible on 7th May 1983.A hard bone like swelling (25×15×20mm) was seen from the gingiva of the left lower deciduous molar region to the left mandibular body, and in CT examination, an ovoid low density area was noticed in proximally contact with the high density mass considered to be the first deciduous molar in the left mandibular region. On the basis of clinical diagnosis of follicular cyst related with the first lower deciduous molar, marsupialization of the cyst was carried out under general anesthesia with Gas-Oxygen-Enflurance on 27 th May 1983.Histologically the cyst lining mainly consisted of cuboidal or squamous epithelium of mono-or double layer in major portion, and high coumnar epithelia were also observed both in the inner lining components and in the subconnective cyst wall.The final diagnosis was determined as follicular cyst from the first lower deciduous molar. The first deciduous molar with enamel hypoplasia erupted about one year later.
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