Abstract
The term pulse granuloma represents a rare inflammatory reaction to vegetable tissue, sometimes found in the aerodigestive tract. We report a case of a pulse granuloma found as an etiologic factor of a collateral cyst. The 22-year-old female patient sought oral surgery service to extract the lower third molars. Clinical examinations and panoramic radiography revealed the presence of a well-delimited, unilocular, radiolucent lesion adjacent to the unerupted crown of element 38. Treatment comprised surgical removal of the tooth and enucleation of the lesion. Histopathologic analysis showed cystic cavity partially covered by odontogenic epithelium presenting amorphous eosinophilic material, fragments of vegetal tissue covered by microbial biofilm, and microbial agglomerates rich in Actinomyces ssp. The vegetable inclusion in this case comes from the communication of the cystic cavity with the oral cavity. The patient did not present clinical or radiographic signs of recurrence after 6 months of follow-up.
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