RESUMO
BACKGROUND: Lateral periodontal cyst (LPC) is an uncommon form of developmental odontogenic cyst. LPC can be suspected when there is a round, well-circumscribed radiolucency, usually of small diameter, along the lateral surface of vital erupted teeth, predominantly in the mandibular premolar region. Histopathological analysis allows LPC to be diagnosed based on its characteristic features such as a thin cuboidal to stratified squamous non-keratinizing epithelium containing epithelial plaques and glycogen-rich clear cells. The aim of this article was to report two cases of atypical LPC associated either with an impacted lower left canine (tooth #33) or with a lower right third molar (tooth #48). CASE PRESENTATION: Case 1: A 56-year-old man was referred to us for an oro-dental assessment. Panoramic radiography revealed an impacted lower left permanent canine (tooth #33) with well-defined radiolucency on its upper cervical margin. A CT scan revealed a pericoronal radiolucency of 5 mm at its widest diameter around the impacted tooth #33. The pericoronal tissue was removed and sent for histopathological examination. The results revealed a lateral periodontal cyst. Satisfactory postoperative healing was achieved at the site. Follow-up at 12 months indicated no recurrence of the lesion. Case 2: A 54-year-old woman consulted with the main issue being pain on the lower right side of the face. Intra-oral examination revealed a vestibular swelling involving the region of the second molar (tooth #47), with obliteration of buccal sulcus. Pocket depth was determined to be 9 mm at the distal of #47. A diagnosis of gingival abscess resulting from chronic periodontitis was made. Panoramic radiography revealed a radiolucent cystic lesion associated with an impacted horizontal lower right third molar (tooth #48), suggestive of a dentigerous cyst. X-rays also revealed alveolar bone resorption on the molar (tooth #47). The cyst was removed along with the third molar and submitted for histopathological diagnosis. The diagnosis was LPC. Follow-up at 18 months indicated no recurrence of the lesion. CONCLUSION: These cases represent atypical presentations of LPC. They provide examples of the differential diagnosis of pericoronal radiolucencies involving an impacted tooth and our observations provide insights regarding the pathogenesis of LPC.
Assuntos
Cistos Odontogênicos , Cisto Periodontal , Dente Impactado , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dente Serotino/diagnóstico por imagem , Dente Serotino/cirurgia , Recidiva Local de Neoplasia , Cisto Periodontal/diagnóstico por imagem , Dente Impactado/diagnóstico por imagemAssuntos
Carcinoma de Células Renais/terapia , Imunoterapia Ativa/métodos , Neoplasias Renais/terapia , Vacina BCG , Carcinoma de Células Renais/imunologia , Feminino , Humanos , Hipersensibilidade Tardia/imunologia , Neoplasias Renais/imunologia , Masculino , Estudos Prospectivos , Análise de SobrevidaRESUMO
From Dec 1986 to Dec 1990, 113 consecutive patients radically resected for renal cell carcinoma, have been randomized after surgery to observation or to Active Specific Immunotherapy (A.S.I.). 43 patients stage I-II and 13 p. stage III, according to TNM entered the treatment arm consisting of 10 autologous irradiated tumor cells injected intradermally, either mixed with BCG 10(7) (on days 28th and 35th after surgery) or alone (on day 42th). At randomization and 1, 6 and 12 months after treatment, patients were evaluated for the development of a DTCH to autologous tumor and to autologous normal cells, obtained by mechanical and enzymatic dissociation of the surgical specimens. Baseline DTCH were negative in all patients. One month after completing A.S.I. 36 out of 50 evaluable patients displayed a significant DTCH response to autologous tumor, which remained positive in 23/40 patients at 6 months. Our data clearly indicate that Active Specific Immunotherapy with autologous tumor cells mixed with BCG can elicit a specific immune response to autochthonous tumor as measured by DTCH.