Junichi Baba

Peripheral Osteoma of the Mandibular Notch: Report of a Case

Osteoma is a benign, slow-growing osteogenic tumor that sometimes arises from the craniomaxillofacial region, such as the sinus, temporal or jaw bones. Osteoma consists of compact or cancellous bone that may be peripheral, central or extraskeletal type. Peripheral osteoma arises from the periosteum and is commonly a unilateral, pedunculated mushroom-like mass. Peripheral osteoma of the mandible is relatively uncommon, and peripheral osteoma of the mandibular notch is extremely rare, although many cases arise from the mandibular body, angle, condyle, or coronoid process. We report here an unusual peripheral osteoma of the mandibular notch in a 78-year-old nonsyndromic female.

Warthin tumor arising from the minor salivary gland.

Warthin tumor (WT) accounts for 4% to 13% of all salivary gland tumors. This benign tumor, which commonly arises in the parotid gland, is the second most common tumor of the salivary gland. WT is multicentric in 12% to 20% of patients and is bilateral in 5% to 14%. The mean age at diagnosis is 62 years (range, 12-92 years), and it rarely presents (<6%) before age 40 years. Extraparotid WT, arising from the submandibular gland or cervical lymph node for example, is very infrequent, with corresponding incidences of 0.4% to 6.9% and 8%, respectively. Moreover, WT arising from the minor salivary gland is extremely rare, with a reported incidence of merely 0.1% to 1.2%. We report here WT arising from the minor salivary gland in the buccal mucosa in a 66-year-old woman and review cases of WT of the minor salivary gland reported in the English literature.

18F-fluorodeoxyglucose-positive Warthin tumor in a contralateral cervical lymph node mimicking metastasis in tongue cancer staging with PET/CT.

We report 18F-fluorodeoxyglucose-positive Warthin tumor in a contralateral cervical lymph node mimicking metastasis in tongue cancer staging with positron emission tomography/computed tomography.

A Case of Bilateral Submandibular Gland Stones in a Child

Sialolith commonly occurs unilaterally in the submandibular gland of adults, while submandibular gland stones occur rarely in children. Here we report a case of bilateral submandibular gland stones in a child. A 7-year-old boy had swelling of the left submandibular gland. The patient was referred to our department for endoscopic removal to avoid submandibular gland removal after bilateral hilar stones of the submandibular gland had been diagnosed in another hospital. Because the left stone, 1.7×1.7×1.1mm in size, was located at the orifice of the papilla at the first visit, the stone was removed under local anesthesia. But, the right stone, 3.0×1.6×1.5mm in size, was located at the hilar, and the patient was followed up. Eight months after the initial visit, the patient had swelling of the right submandibular gland. Because the right stone was located at the orifice of the papilla, the right stone was removed under local anesthesia. There was no recurrence after the removal of submandibular gland stones.

Application of Orthognathic Surgery to Treat Post-traumatic Malocclusion Caused by An Old Mandibular Fracture

We present a case of a patient with post-traumatic malocclusion caused by a mandibular condylar fracture who was treated with a conventional osteotomy technique for jaw deformity to improve the malocclusion. Case : A 63-year-old woman visited our hospital in 2007 with the chief complaint of malocclusion. She had been involved in a traffic accident in November 2006 and had been admitted to another hospital with a head injury, cerebral bleeding, and fracture of the clavicle and rib. However, since that time, she had been concerned about her malocclusion. We diagnosed an old mandibular condylar fracture and the patient underwent an intraoral vertical ramus osteotomy 6 months after the traffic accident. Following the surgery, functional occlusion could be secured and established. The postoperative course has been uneventful for the 5 years since then. Therefore, an intraoral vertical ramus osteotomy that is osteotomized in a different place from the original fracture line can be effective in improving post-traumatic malocclusion.