Central mucoepidermoid carcinoma of the anterior region of the mandible: report of an unusual case and review of the literature.

Introduction: Central mucoepidermoid carcinoma is a rare lesion, whose exact pathogenesis is still not fully understood. Generally, it is more frequently encountered in the mandible than in the maxilla and in the posterior than in the anterior aspect of the jaws. Cases of central mucoepidermoid carcinomas are rarely mentioned in the literature, and therefore, additional information concerning this type of lesion is needed.

Primary ileocaecal B-cell non-Hodgkin lymphoma (NHL): a rare underlying cause of right iliac fossa pain.

Primary gastrointestinal non-Hodgkin lymphomas (NHL) account for about 0.9% of all gastrointestinal tract tumours. They are usually associated with ulcerative colitis, Crohn's disease, previous radiotherapy, renal transplantation and AIDS.

Extraocular sebaceous carcinoma mimicking benign sebaceous cyst.

Extraocular sebaceous carcinoma (SC) is an exceptionally rare neoplasm and has been confused in the past with basal cell carcinoma showing sebaceous differentiation. However, in contrast to the latter tumour, SC can be an aggressive cancer. We describe the case of a 55-year-old man with a 3-year history of a 5 × 2 cm lesion on the posterior thoracic wall.

Metastasis of a ductal breast carcinoma to the buccal mucosa of the mandible with tooth involvement.

Background: We present a metastatic tumour from the breast to the gingiva, with the rare finding of tooth invasion. Metastatic tumours to the oral region are uncommon. The breast is the most common primary site for metastatic tumours to the jawbones in women, with the mandible being most often affected.

A splice variant of HER2 corresponding to Herstatin is expressed in the noncancerous breast and in breast carcinomas.

Herstatin (HST) is an alternatively spliced HER2 product with growth-inhibitory properties in experimental cancer systems. The role of HST in adult human tissues and disease remains unexplored. Here, we investigated HST expression at the mRNA and protein (immunohistochemistry [IHC]) level in parallel with parameters reflecting HER activation in 187 breast carcinomas and matched noncancerous breast tissues (NCBT).