ABSTRACT
Plasma cell gingivitis is gingivitis which includes these clinical features: red and loosely gingival enlargement, sometimes is granular that with easy bleeding and usually does not cause attachment loss. In the histologic feature of this lesion there are closed plasma cells in under connective tissue that have extended to the oral epithelium. Causal factors include: allergic factors such as chewing gums, toothpaste, autoimmune reaction, hormonal imbalance and hematologic infiltration. However sometimes there is no clear cause. The aim of this study was case report of plasma cell gingivitis and the way to treat this lesion. The case was a 14 year-old girl whose chief complain was gingival bleeding. In an intra oral examination there was diffused red gingival enlargement in the anterior and right sextants of the jaw. In an extra oral examination there was no significant finding. Hematologic laboratory test was normal. In a radiographic feature, marginal bone loss was not detected and in a histopatologic feature there were acanthotic epithelium with closely infiltration of inflammatory cell with dominant plasma cell in under lamina properia. Surgery was performed by flap method in order to eliminate gingival enlargement and then the patient fallowed during the maintenance phase. In this case there was not any recurrence of the disease during the 6 month fallow up and any special allergic cause related to this patient was not detected. However, this patient was in pubertal age, and there may be a corelation to hormonal imbalance and this is one suggested causal factors