Yasuo Yokobayashi

Marsupialization as a possible diagnostic aid in cystic ameloblastoma. Case report.

Two cases of cystic ameloblastoma are described in which the diagnosis was established after marsupialization. Although the clinical and radiographic findings strongly suggested the diagnosis of ameloblastoma, the initial incisional biopsy specimens consisted of cystic walls lined with squamous epithelium which showed in both cases no evidence of ameloblastic proliferation. Marsupialization could be a diagnostic aid in these cases since relief of intracystic pressure may trigger regeneration of a solid mass of tumour in a monocystic ameloblastoma with cells possessing potentiality for spontaneous proliferation.

Central carcinoma of the jaw: A survey of 28 cases in the Japanese literature

A survey of the Japanese literature revealed 28 well-documented cases of central carcinoma of the jaws. There was no sex predominance and the mandible was the site of involvement in 26 cases. The most common initial symptom was local swelling, which was followed in order of frequency by spontaneous pain, paraesthesia of the lower lip, discomfort, loosening of teeth and trismus. On clinical examination, local swelling which was often accompanied by variable symptoms was an almost constant finding. Radiographic appearance varied from unilocular to worm-eaten type radiolucencies which were often surrounded by indistinct margins on close examination. Radical surgery, combined with irradiation and/or chemotherapy was the principal treatment in most cases, but there were 4 cases in which the lesions were simply excised under a tentative diagnosis of cyst; local recurrence was noted in 5 cases. Regional lymph node metastasis and lung metastasis were observed in 8 and 2 cases, respectively. No definite conclusion was drawn with regard to the prognosis because of the short follow-up period. Histologically, epidermoid carcinoma was most frequently seen, but odontogenic cyst was confirmed to be the site of origin in 3 cases only.

Reimplantation of frozen-thawed autogenous mandible after resection of an ameloblastoma

A case of immediate reimplantation of a frozen-thawed autogenous mandible with a mixture of iliac bone, marrow, and particulate hydroxylapatite in a 12-year-old boy with an ameloblastoma of the mandible is described and the conditions leading to successful outcome of the procedure are discussed.

Disseminated intravascular coagulation associated with infection secondary to carcinoma of the maxillary sinus

Abstract Disseminated intravascular coagulation (DIC), a serious condition, results from the consumption of coagulation factors and activation of fibrinolysis, leading to a bleeding tendency and the formation of microthrombi. It is known to occur in association with a variety of conditions, such as malignancy, infection, complications of pregnancy, liver disease, and trauma. The most frequent causes, however, are leukemia; malignant neoplasms of the lung, stomach, pancreas, and prostate, with metastases; infection with gram-negative rods; or combinations of these conditions. Reports of DIC in patients with oral malignancies are extremely rare. In this paper, DIC occurring in response to septic infection with Staphylococcus aureus in a patient with carcinoma of the maxillary sinus is described.

Non-Hodgkin's lymphoma of the gingiva: A case report

An unusual case of non-Hodgkins lymphoma with a progressive, necrotizing ulcer of the gingiva is reported. An establishment od diagnosis was difficult because of lack of malignancy in repeated biopsy specimens. Radiotherapy combined with administration of anti-tumor agents was effective in producing a rapid remission of the oral lesion, but multiple metastases appeared in the skin and the patient died 7 months after the onset of the initial symptoms. The tumor was regarded as being of gingival origin because of the absence of a primary focus in any other site of the body.