This report describes a case of schwannoma that occurred simultaneously in the mandibular body and the lateral cervical region. The patient was a 48-year-old male who was referred for a thorough examination of cervical swelling. A CT scan revealed masses in the mandible and the neck. A biopsy of the mandibular mass was performed, and a diagnosis of schwannoma was made. The neck mass was deeper than the sternocleidomastoid muscle, and biopsy was not feasible. The mandibular and neck tumors were removed under general anesthesia. The pathological diagnosis revealed similar histopathological findings of the mandibular and cervical masses. No recurrence has been observed during one year of follow-up.

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A 58-year-old woman visited our clinic complaining of a small mass lesion on the tongue margin. The clinical diagnosis was a lymphoepithelial cyst and surgical resection was performed. Pathologically, the mass was lined with stratified squamous epithelium showing parakeratinization, and a lymphoid follicle structure with a germinal center was observed adjacent to the cyst wall. The cyst was located extremely superficially and taste buds were present in the covering mucosa and lining epithelium of the cyst. The superficial lesion was attributed to invagination of epithelium.

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Gingival cyst of the adult is a rare odontogenic cyst occurring in the gingiva. The patient was a 62-year-old woman who was referred to our clinic by her family dentist to investigate an abnormality of the gingiva. A slightly raised gingival lesion 3mm in diameter was detected on the attached gingiva between the right maxillary canine and first premolar. No bone resorption was detected on radiography. Cystic lesion of the gingiva was suspected and surgical resection was performed. Pathologically, cyst formation with thin non-keratinized epithelial lining was observed, and gingival cyst of the adult was diagnosed. No evidence of recurrence has been seen since surgery. We reviewed the Japanese literature on gingival cysts of the adult.

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We report a rare case of actinomycosis in the upper lip mucosa. A 50-year-old woman complained of swelling on the inner surface of the right upper lip. A mass lesion 10 mm in diameter was found on the mucosal surface of the right upper lip. The clinical diagnosis was a benign tumor or cystic disease and the lesion was surgically resected. Histopathologically, the lesion mainly comprised chronic granulation tissue with prominent neutrophil infiltration and actinomycotic sulfur granules. The lesion was finally diagnosed as actinomycosis. The postoperative course was uneventful and no postoperative recurrence has been identified.

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