Hepatocellular carcinoma metastatic to the mandible.

We describe the case of a 55-year-old man with known multifocal hepatocellular carcinoma (HCC) who presented with a painful mandibular mass. Fine-needle aspiration cytology of the mass revealed the presence of bile canaliculi and bile formation, an extremely rare finding. Findings on immunoperoxidase staining of the aspirate were consistent with an HCC.

Synchronous ipsilateral Warthin tumor encased by a separate mucoepidermoid carcinoma of the parotid gland: a case report and review of the literature.

Fine-needle aspiration (FNA) is a cost effective and low morbidity procedure in the initial assessment of salivary gland tumors. However, cytological assessment of ipsilateral synchronous tumors (which make up less than 0.3% of all salivary gland neoplasms) may pose diagnostic challenges.

"Benign," metastasizing adenomyoepithelioma of the breast: a report of 2 cases.

Adenomyoepitheliomas of the breast are rare tumors composed of a proliferation of 2 cell populations. For the most part, they are considered to be benign, but they locally recur. Those neoplasms that metastasize are deemed to have come from a histologically malignant primary tumor.

The p38-MAPK/SAPK pathway is required for human keratinocyte migration on dermal collagen.

Human keratinocyte motility plays an important role in the re-epithelialization of human skin wounds. The wound bed over which human keratinocytes migrate is rich in extracellular matrices, such as fibrin, fibronectin, and collagen, and serum factors, such as platelet-derived growth factor and transforming growth factor beta 1. Extracellular matrices and the serum factors bind to cell surface receptors and initiate a cascade of intracellular signaling events that regulate cell migration.