Ameloblastoma is a benign but locally aggressive epithelial odontogenic neoplasm. It represents 1% of all tumours of the jaw bone. In 80% of cases, it is localized in the mandibular molar and ascending ramus area, mostly associated with an unerupted tooth. It occurs over a wide range of ages (mean age is in the 20s or 30s) and with equal frequency in men and women. Ameloblastoma may be discover...

Introduction: The odontogenic myxoma is generally considered to be a rare neoplasm unique to the jaws. In the international histological classification of odontogenic tumors, odontogenic myxoma (OM) is defined as a benign odontogenic tumor of mesenchymal origin that is locally invasive and consists of rounded and angular cells lying in abundant mucoid stroma. Since these neoplasms are rare in t...

Calcifying cystic odontogenic tumor (CCOT) is an uncommon benign cystic neoplasm of the jaw that develops from the odontogenic epithelium. It is clinically characterized as a painless—slow-growing tumor that affects the maxilla as well as the mandible, and generally occurs in young adults in the third or fourth decade of life. Herein, we present the case of a 16-year-old Japanese boy who showed...

L angerhans’ cell histiocytosis (LCH), formerly known as histiocytosis X, is one of a group of poorly understood diseases of histiocytes. The clinical spectrum of disease ranges from the chronic, localized form to an acute leukemia-like disease with a fatal outcome. Alfred Hand was the first to report a case of histiocytosis in 1893.1 Later, in 1941, Farber described this condition when reporti...

Ameloblastoma, a benign neoplasm of jaw bones is the most common of all odontogenic tumors. Its pathology is generally well understood and is easy to diagnose. This article presents a rare case of an ameloblastoma with atypical features depicting an example of the diagnostic difficulty posed by some ameloblastomas and briefly reviews the classification and literature of odontogenic malignancies...

Intraosseous hemangiomas are the rarest lesion of jaw bones (0.5–1%) occurs more commonly in vertebral column, skull bone, and rarely in mandible. Mostly occurs in the 2 nd decade of life with female: male predilection (2:1). Origin of hemangiomas is still not clear. World Health Organization considers it as a true benign neoplasm of vascular origin, and many authors believe it to be a hamartom...

Squamous cell carcinoma is a malignant epithelial neoplasm characterized by variable clinical manifestations. When located in the gingiva, this neoplasm may mimic common inflammatory lesions. The aim of this study was to report a case of atypical squamous cell carcinoma. A 60 Year old male patient was presented to the department with complains of pain and ulcer in the upper right back region of...

ntroduction: Odontogenic fibromas (OFs) were defined in the latest classification of the World Health Organization (WHO) as a uncommon neoplasm characterized by an erratic quantity of inactive odontogenic epithelium in a rather-mature fibrous stroma. [1] OF is considered to be an " Elusive and controversial tumor " due to its rarity and the uncertainty. [2] It is a benign neoplasm, representing...

a set of one hundred and twenty nine patients with known primary malignancy and suspected brain metastasis was reviewed in present study. the patients were selected among patients presented to the mri section of imam khomeini hospital or a private mri center in tabriz (iran). primary tumor site, clinical manifestations, number and site of lesions were identified in this patient population. the ...

abstract background: abdominal tumors are still a diagnostic problem in children. this study was conducted to assess the presentation and types of childhood intra abdominal tumors in children in shiraz. materials and methods: participants of this historical cohort study consisted of 298 children aged between 1.5 months to 15 years old who were diagnosed with abdominal mass between march 2003 an...