Revised histcpathologicacll assificatioofn o dontcgenic tumors by World Health Organization (WHO) has been published in 2005 by Internaticna Aig ency fcr Research on Cancer (IARC).In this classificaticmno, st malignant tumors are generallyc onsidered the counterpartso fbenign odontogenic tumors. Odontogenic carcinomas are classifieidn tom etastasizing (malignant) ameloblastoma, ameloblasticc arcincmas, p rimary intraosseous squamcus cellc arcinomas (sclidt ype, d erived frcm keratocystico dcntogenic tumor and derived frcm odcntogenic cysts), c learc ello dontogenic carcinoma and ghost cello dcntogenic carcinoma. Odontogenic sarcomas are ameloblasticf ibrcsarccma and amelcblasticf ibrc-odcntcsarccma B.e nign tumcrs are classifieidn tcf ollcwingf our categories; 1) odontogenic epithelium with mature, fibrous strcma without odcntogenic ectcmesenchyme, 2) odontogenic epithelium with odontogenic ectomesenchyme with or without hard tissue formation, 3) mesenchyme and/or odcntogenicectomesenchyme with or without odcntcgenic epithelium, and 4) bone-related lesions. Category 1 is composed of various types of ameloblastoma, squamous odontogenic tumor, calcifyingepitheliaold ontogenic tumor, adenomatoid odontogenic tumor, and keratocystico dontogenic tumor named odontcgenick etarccysti n previcus classificatiCcan.t egcry 2 consistso f ameloblasticf ibroma, a melcblasticf ibrcdentinoma, ameloblasticf ibro-odontoma, o dontomas, odontoameloblastoma, calcifyingc ystico dcntogenic tumor and dentinogenicg hcst cellt umcr.Both calcifyincgy stico dontogenic tumor and dentinogenicg host cellt umor were previcuslyn amed calcifyinogd cntcgenic cyst.O dcntogenic fibrcma, odcntcgenic myxcma and cementoblastcma are classifieidn to category 3. Category 4 is composed of ossifyingf ibroma, f ibrousd ysplasia, o sseous dysplasia, centralg iantc elll esicn, c herubism, aneurismal bone cysta ndsimple bone cyst.
Although odontogenic epitheliacly stsi s not included in the revised WHO's histologicacll assificatioofn o dontogenic tumors, terminologicaplr oblems of a few cystsc lassifieidn 1992 are describedi n the present paper.

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To identify specific markers of adenoid cystic carcinoma (ACC), we profiled protein expression in ACC and normal salivary glands (NSGs) by fluorescent 2-dimensional differential in-gel electrophoresis (2-DDIGE), a new technique for comparative proteomics. To identify the proteins, matrix-assisted laser desorption/ionization time-off-flight (MALDI-TOF) peptide mass fingerprinting (PMF) was carried out. Using these strategies, we detected three up-regulated proteins and three down-regulated proteins in ACC. Among these proteins, we obtained two antibodies, which were specific to stathmin and maspin, respectively. With the use of these antibodies, Western blotting confirmed the differential expression of these twoproteins in five clinical samples of ACC tissue, as compared with NSGs. These results may contribute to a better molecular understanding of ACC, as well as to the development of useful clinical biomarkers for tumors.

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A rare case of osteomyelitis of the mandibular condyle is reported. A 35-year-old woman presented with pain in the right parotid region. A dull pain had developed in the right parotid region the previous month, and swelling and pain gradually increased. At presentation, the interincisal distance was 12 mm. Radiographs revealed no obvious findings of inflammation. We doubted that her clinical symptoms were caused by parotitis and administered cefditoren pivoxil, but her symptoms worsened. The parotid gland was normal on sialography. However, osteomyelitis of the right condylar head of the mandible was found on CT, MM, and bone scintigraphy. An abscess was noted in the right parotid region. We therefore performedbacterial examinations by centesis.
Microbiological examination showed an abscess associated with a mixed infection involving Gram-negative bacteria, with a dominance ofActinobacillus actinomycetemcomitans.Antibiotic treatment was switched to levofloxacin totreat this organism. Inflammation subsided and after 7 days. The interincisal distance returned to 30mm. There was no inflammatory recurrence for 12 months. A CT scan obtained after 5 months showed signs of remineralization in the condylar head of the mandible. In this patient, a blood-borne or local infection in the mandible appasently caused a bacterially induced form of periodontal disease.

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Abstract: Mucinous cystadenoma (MCA) usually occurs in the appendix, ovary, kidney, and pancreas. MCA is sometimes considered a borderline tumor. In the oral and maxillofacial region, MCA most commonly occurs in the parotid glands and the minor salivary glands; however, the frequency is low.
We describe a 65-year-old woman who had a slowly enlarging tumor, 10mm in diameter, in the hard palate. Magnetic resonance images of the lesion revealed hyperintensity on both Ti-weighted and T2-weighted images. The tumor was successfully excised.
Histologically, the tumor was surrounded by a fibrous capsule, and cystic spaces werelined by mucus-producing cells or goblet cells. There was no cellular atypia or invasive growth. The histological diagnosis was MCA.

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Adult rhabdomyoma is rare benign tumor of muscle origin usually occurring in the head and neck region. Only a few cases of this disease have been reported in the literature.
We describe a 63-year-old man with an adult rhabdomyoma arising in the floor of the mouth. The patient was found to have a mass occurring in the right side of the floor of the mouth on examination at a dental clinic. When he visited our department on June 16, 1999, a mass measuring 25×35mm was found in the right side of the floor of the mouth. We felt pseudofluctuations on the normal mucosa. CT imaging demonstrated a low-density mass. The Clinical diagnosis was a bengin tumor of the right side of the floor of the mouth. The tumor was surgically removed on July 7, 1999. It was an elastic, reddish brown, encapsulated tumor measuring 50×40×18mm. Histological examination revealed an adult rhabdomyoma.

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Sialodochitis fibrinosa (Kussmaul's disease) is a rare disease characterized by recurrent swelling of the salivary glands due to obstruction of the duct system by a fibrinous plug.This paper describes a 58-year-old woman with sialodochitis fibrinosa bilaterally affecting the submandibular glands. The patient had recurrent swelling of the submandibular glands. Histopathological examination revealed numerous eosinophils and epithelial cells in a fibrinous plug extruding from Wharton's ducts. Symptoms were relieved by enlargement of theorifice of the ducts, irrigation of the submandibular glands with saline, and administration of antiallergic drugs.

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