Introduction: cyclooxygenase-2 (COX-2) is involved in pathogenesis of various tumors and possibly malignant skin tumors including malignant melanoma; however, there is not enough information about COX-2 expression in benign melanocytic lesions. In the present study we compared the expression levels of COX-2 in malignant melanoma and benign melanocytic lesions. Method: In this analytical study, ...

Our objective is to describe the CT features of exophytic hepatic tumors those may pose a diagnostic challenge because of the uncertainty of tumor origin. The beak sign and the feeding artery of a tumor are useful diagnostic indicators of exophytic hepatic tumors. Two- or three-dimensional reformation images are also helpful for diagnosis. The CT features of exophytic hepatic tumors are similar...

Inverted papilloma is the most common benign tumor of nose and paranasal sinuses arising from lateral nasal wall and middle meatus. Histologically these tumors are composed of epithelial nests that are inverted, exophytic and cylindrical. Here we describe a clinical case of nasal cylindrical cell papilloma, which was treated by endoscopic excision.

BACKGROUND AND AIMS Histpathologic diagnosis of exophytic lesions is occasionally influenced by clinical and radiograph-ic diagnosis and even the surgeon's observation during biopsy. The aim of this study was to evaluate the cases with failure in clinical diagnosis. MATERIALS AND METHODS A total of 73 patients with peripheral exophytic lesions were evaluated in Zahedan Faculty of Den-tistry i...

INTRODUCTION The role of laser in conservative management of oral disease is well established. Laser procedures are common in the fields of oral surgery, implant dentistry, endodontic, and periodontic therapy. CASE This case series describes the use of diode laser for the excision of oral exophytic lesions. All the patients attended the oral medicine department of Shahid Beheshti University o...

I. Background Seborrheic keratoses are common, benign, pigmented epidermal tumors.[1] Many terms such as senile wart, melanoacanthoma, basal cell papilloma, senile keratosis and seborrheic wart have been applied, but seborrheic keratosis is the most widely accepted term. These usually develop after the age of 50 years although occasionally, seen in young adulthood without any sexual predilectio...

Pyogenic granuloma is a relatively common benign lesion of the skin and/or mucosal surfaces, accounting for 0.5% of all skin nodules in children in the United States alone (Lin et al, 2004). The aetiology is still poorly understood but trauma, hormonal influence, viral oncogenes, microscopic arteriovenous malformations and growth factors (e.g. tumour angiogenesis factor – Patrice et al, 1991) h...

BACKGROUND Recurrent laryngeal papillomatosis is caused by the human papilloma virus and characterized by multiple exophytic lesions of the vocal tract; it is a benign disease, but one that tends to recur after removal of growths. Due to the nature of the disease, alternative treatment strategies have focused on antiviral injection at lesion sites that eliminate repeated surgical procedures. Th...

Papillomaviruses (PVs) induce papillomas, premalignant lesions, and carcinomas in a wide variety of species. PVs are classified first based on their host and tissue tropism and then their genomic diversities. A laboratory mouse papillomavirus, MmuPV1 (formerly MusPV), was horizontally transmitted within an inbred colony of NMRI-Foxn1(nu)/Foxn1nu (nude; T cell deficient) mice of an unknown perio...