Mucosal malignant melanoma is an uncommon tumor of the head and neck, and patient cannot easily recognize the lesion. Most patients are diagnosed with advanced lesions, and the 5-year survival rate is very low. Therefore, intraoral pigmented lesions require an incisional biopsy for differential diagnosis from malignant melanoma. As the size of the tumor increases, lesion showing vertical growth and lymph node metastasis increases, and the prognosis becomes poor. In this study, we report a case of mucosal malignant melanoma in the oral cavity that shows radial growth and no lymph node metastasis despite its relatively large size.

The follicular lymphoid hyperplasia is a very rare nonneoplastic lymphoproliferative disease in the oral mucosa. Clinically, it usually presents as asymptomatic, non-ulcerated, normal-colored, soft, sessile, unilateral and slow growing mass in the posterior hard palate. Therefore, soft-tissue mass of the hard palate can be a difficult diagnostic challenge for the clinician. Herein, we report a case of follicular lymphoid hyperplasia located in the left posterior hard palate. A 40-year-old male presented a soft, non-ulcerated, painless mass of 1.5 X 1.0cm in size. Radiographically, it was no bony involvement. Histology revealed germinal center surrounding mantle zone of small lymphocytes. Immunohistochemistry showed CD3,CD20 were postive but Bcl-2 and cyclin D1 were negative. The patient underwent surgical excision and 3-year follow-up has not shown any evidence of recurrence.

Intravascular papillary endothelial hyperplasia (IPEH) is a rare benign vascular lesion that rarely occurs in the oral cavity. Its clinical features are similar to neoplasms, which are easily identified in the oral cavity, and it can be misdiagnosed as an angiosarcoma. Therefore, it is important to recognize the characteristics of the lesion in order to both diagnose and treat it properly. We report a case of IPEH in a young Korean female patient, as well as discuss its differential diagnosis and treatment using a review of the related literature.

Al thou gh calcifi cation is a common finding in inflammatory salivary gland disorders , saliva ry gland tumour ra rely s hows calcifications. A case of clear cell mucoepidermoid carcinoma(MEC) of the hard pa late with extensive intra tumoural calcifïcations vis ible on computed tomog r때hy(CT) scans and histologic sections is described. The calci fï caLion in the sali va ry gland tumour 0 1' the palate recogni zed by a CT scan s hould be considered in the differential diagnosis of a MEC The mechanism of the i ntratumoural calcifi cation in our case is speculated to be a result of a secretory fu nction 0 1' the tumour cells