Melanin and odontogenic cysts: An ambiguous yet imperative relation.

Pigmentation in the head-and-neck lesions is an uncommon feature. The presence of it is fascinating, but its relevance is unknown. Various odontogenic and nonodontogenic lesions show the presence of melanin pigment.

Classification staging systems on clinical and radiographic features of inverted sinonasal papilloma: A case report.

Inverted sinonasal papilloma is an infrequent tumor that mostly affects the elder group of 40-50 yr. This tumor is distinguished from other sinonasal tumors by three characteristics: a high rate of recurrence, carcinomatous changes, and a high potential for local destruction. In 40% of cases of inverted sinonasal papilloma showed an association with the human papillomavirus and considered as the main etiological agent.

The Current Understanding on Langerhans' Cells and Its Role in Oral Lesions.

Objective: Description of Langerhans' cells (LCs) as an important antigen-presenting cells responsible for detecting the antigens, recruiting T-cells, and thereby initiating the immune response. An adequate response of the mucosal immune system is essential to protect the mucosa against pathological conditions. Hence, a detailed review was planned about this unique antigen-presenting cell.

Cystadenoma in Retromolar Region: A Case Report.

Cystadenoma is a rare benign salivary gland epithelial tumor that is characterized by intraluminal papillary projection. Majority of the tumors are located in minor salivary glands and usually occur in palatal and buccal mucosa, but rarely found in retromolar area. Clinically it is difficult to differentiate it from other minor salivary gland tumors, and diagnosis is chiefly based on characteristic clinical features and immunohistochemistry.