The mother brings her 2 year old child to OPD with gum swelling on lower back tooth region. On intraoral examination, smooth – surfaced bluish lesion associated with erupting 75. Radiographic examination reveals a soft tissue shadow and there is no bone involvement. What is the most probable diagnosis?
Correct Answer: Eruption cyst
Description: Eruption cyst is defined as an odontogenic cyst with the histologic features of a dentigerous cyst that surrounds a tooth crown that has erupted through bone, but not soft tissue and is clinically visible as a soft fluctuant mass on the alveolar ridges. An eruption cyst or ‘eruption hematoma’ is in fact a dentigerous cyst occurring in the soft tissues (Shear, 1992). Whereas, the dentigerous cyst develops around the crown of an unerupted tooth lying in the bone, the eruption cyst occurs when a tooth is impeded in its eruption within the soft tissue overlying the bone.
Shafer's Oral pathology Pg- 263, 264
Category:
Radiology
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