[Peripheral ameloblastic fibrosarcoma].

We describe the clinicopathological features of a peripheral ameloblastic fibrosarcoma (PAFS) diagnosed in a 89-years-old man with a past history of recurrent peripheral ameloblastoma. Like other peripheral odontogenic tumors, PAFS shows histological features comparable to those of the central intraosseous form, with (fibro)sarcomatous proliferation associated to benign-appearing ameloblastomatous areas. The differential diagnosis must be made with a low-grade spindle ameloblastic carcinoma and with a collision tumor (a non odontogenic sarcoma associated with a recurrent ameloblastoma).

[Giant cell tumor of the mandibular condyle. Apropos of a case].

One case of giant cell tumor located in the mandibular condyle is reported. This case was revealed by a progressive mandibular deviation. Frequency, localization, etiopathogenesis and histological feature are discussed.

[Microsurgical reconstructions of the lower face, after projectile injuries. Value of fibular flaps. Apropos of 20 cases].

Projectile trauma of the lower face causes major functional damage and disfigurement. Reconstruction with tissue flaps, after microsurgical revascularization to guarantee tissue vitality, can restore satisfactory mental function. We report 26 mental reconstructions, including 20 using free fibular flaps which, due to its vascular pedicle and length of the available bone, appears to be the best adapted for reconstruction of the lower face.

[False Merkel cell tumor of the gingival mucosa disclosed by small cell bronchial carcinoma].

Merkel cell tumours are exceptional and usually occur in exposed areas of the face or limbs. These tumours are related to small-cell bronchogenic cancer. The case reported here demonstrates the relationship between these two cancers since the diagnosis of Merkel cell tumour of the gingival mucosa, initially made in a patient with no other presenting signs other than the stomatological lesions, was corrected six weeks later when the buccal lesion was found to be a metastasis of small-cell bronchogenic cancer.