Rathke's cleft cyst: incidental finding in an orthognathic surgery patient.

A case of this rare parasellar cyst is reported in a patient presenting for orthognathic surgery. The pathogenesis, clinical, histologic and radiologic features of this cyst are reviewed. This case underscores the necessity of careful evaluation of cephalometric radiographs.

Primary intraosseous carcinoma involving the anterior mandible.

A case is reported of a primary intraosseous carcinoma arising in the anterior mandible with metastasis to the submandibular lymph node in a 69 year-old Caucasian female. The patient initially presented with a burning sensation in the oral cavity in 1983, when no obvious pathological finding was noted; she returned 2 years later with a firm buccal swelling which had increased in size after the extraction of a mobile tooth. The tumour proved to be a primary intraosseous intraosseous carcinoma; extensive investigation did not reveal a primary carcinoma elsewhere.

Binding of polyphenols to plant cell wall analogues - Part 2: Phenolic acids.

Bacterial cellulose and cellulose-pectin composites were used as well-defined model plant cell wall (PCW) systems to study the interaction between phenolic acids (PA) derived from purple carrot juice concentrate (PCJC) and PCW components. Significant PA depletion from solution occurred, with pure cellulose initially (30s-1h) absorbing more than cellulose-pectin composites in the first hour (ca 20% cf 10-15%), but with all composites absorbing similar levels (ca 30%) after several days. Individual PAs bound to different relative extents with caffeic acid>chlorogenic acid>ferulic acid. Extrapolation of data for these model systems to carrot puree suggests that nutritionally-significant amounts of PAs could bind to cell walls, potentially restricting bioavailability in the small intestine and, as a consequence, delivering PAs to the large intestine for fermentation and metabolism by gut bacteria.

Two cystic lesions with features of both the botryoid odontogenic cyst and the central mucoepidermoid tumour: sialo-odontogenic cyst?

Two cases are reported with identical clinical, radiographical and histological features. These features share a combination of the botryoid odontogenic cyst and a central mucoepidermoid tumour, and it is suggested that the term sialo-odontogenic cyst be adopted for such lesions to avoid confusion and mismanagement.

The areca nut chewing habit and oral squamous cell carcinoma in South African Indians. A retrospective study.

A retrospective study (1983-1989) of oral squamous carcinomas and concomitant oral habits was undertaken in South African Indians from Natal. Information came from hospital records and interviews with patients, families and friends. There were 143 oral squamous carcinomas; these occurred in a ratio of 1:1,6 for men and women respectively. Squamous carcinomas of the cheek (buccal mucosa, alveolar sulcus and gingiva) occurred most frequently, especially in women (57/89--64%), while in men tongue cancer predominated (22/54--41%). Ninety-three per cent of women (83/87) and 17% of men (9/54) habitually chewed the areca nut. Thirty-nine of 57 women (68%) with cheek cancer and 21/25 (84%) with tongue cancer only chewed the nut (no tobacco, snuff or smoking). Analyses confirmed an association between nut chewing and cheek cancer. The odds ratio (OR) for oral cancer in women 25 years and older who only chewed the nut was 43,9 and the attributable risk (AR) 0,89 (89%). With tobacco the OR increases to 47,42 and the AR to 0,91 (91%). The data showed that the areca nut habit with or without tobacco use is important in the development of oral squamous carcinoma. Elimination of this habit can reduce the risk in these women substantially (89-91%) if all other factors remain the same.

Radicular cysts of primary teeth mimicking premolar dentigerous cysts: report of three cases.

In three cases, the clinical diagnosis of dentigerous cyst was disproved by surgical exploration. In all other cases reviewed from a thirteen-year period, the clinical diagnosis of radicular cyst from an infected primary tooth was verified by surgery and histological examination.

A rapidly fatal palatal ulcer: rhinocerebral mucormycosis.

A case of a patient with a palatal ulcer who was in a diabetic ketoacidotic coma is described. This ulcer proved to be the presenting sign of rhinocerebral mucormycosis. The patient had hemifacial swelling, ocular signs, and gross tissue destruction and died less than 4 weeks after she was first seen.