Clinical and histological aspects of malignant inverted sinonasal papilloma. Two case reports.

The inverted sino-nasal papilloma is a benign epithelial lesion, ranging from 1% to 5% of the tumors that reside in this area. It is characterized by a tendency towards local bone destruction, recurrence and malignant transformation. This is a presentation of two cases diagnosed and surgically treated for malignant inverted papiloma, which started in the epithelium of the maxillary sinuses.

Histological patterns in orbital malignant tumors.

There is a wide variety of tumors affecting the orbit. The most encountered histological type of malignant orbital tumor is the basal cell carcinoma followed by the malignant melanoma and the squamous cell carcinoma. The authors conducted a retrospective review of the malignant orbit tumors from the Department of Oral and Maxillofacial Surgery, University Emergency Hospital of Sibiu, Romania.

Malignant ameloblastoma in an 8-year-old child with metastasis to the lung: case report with a clinicopathologic analysis.

Ameloblastomas are rare tumors of odontogenic origin, accounting for 1% of all oral tumors. They are benign, but locally highly aggressive tumors. We report here the unusual case of an 8-year-old patient with multicystic mandibular ameloblastoma, who was submitted to surgery for two relapses in six years and metastasized to the lung two years after initial surgery.