he adenomatoid odontogenic tumor (AOT) is a clinically benign lesion. Discussions about the AOT hamartomatous or neoplastic nature, and the probable odontogenic epithelial cell it originates from still exist. This research aimed to study and discuss the subject by the immunohistochemical detection of cytokeratins, laminin, collagen IV, PCNA and p53 in 8 tumor samples and 8 dental follicle sampl...

Three cases of epididymal adenomatoid tumor are presented. The adenoid compositions of the tumors lined by epithelial cells showed a canalicular pattern with large vascular spaces, tubular pattern with glandlike regions or plexiform pattern with connective tissue strands. Immunohistochemistry demonstrated positive cytoplasmic staining for keratin, but negative for carcinoembryonic antigen and f...

Adenomatoid odontogenic tumors are considered, rather than a neoplasia, a benign, hamartomatous epithelial lesion of odontogenic origin . Steensland fi rst described it in 1905; he considered it as a variation of ameloblastoma.1 Stafne, in 1948 described it as an «ameloblastic adenomatoid tumor or adenoameloblastoma»,2 since it presented structures which simulated canals or glands, he therefore...

We describe a case of an infarcted adenomatoid tumor of the epididymis that was challenging to diagnose. A 20-year-old man presented with acute left scrotal pain. He was found to have a 2×1.5×1 cm tumor that was relatively well circumscribed on gross examination. There was a central necrotic area that exhibited gaping spaces and ghost outlines of epithelial cells. The periphery of the necrotic ...

Pulmonary hamartomas are benign tumors, which represent abnormal mixture of fibrous connective tissue, hyaline cartilage, fat and bone as well as bronchial epithelial cells. Differential diagnosis of tuberculoma, malignant neoplasms and hamartoma is necessary. We present the tuberculosis patient with pulmonary hamartoma mimicking lung tuberculoma. The uncorrected diagnosis of tuberculoma was ma...

A 31-year-old lady presented to the otorhinolaryngology clinic complaining of right exophtalmus. Imaging studies revealed a right frontal sinus mass, suggestive of a mucocele, and fronto-ethmoidal ground glass opacification. In the operating room, the frontal sinuses were exposed through an osteoplastic flap, and connected to the nasal cavity through a Lothrop-like drainage pathway. The patholo...

The combined epithelial odontogenic tumor is known to be an uncommon lesion characterized by the synchronous presentation of typical histological features of adenomatoid odontogenic tumor, calcifying epithelial odontogenic tumor, or Pindborg tumor. Combination between other types of odontogenic tumors has occasionally been reported in the literature. In this work we report 2 cases of adenomatoi...

Introduction: Adenomatoid odontogenic tumor since years has been a subject for diligent research by Oral Medicine and Radiologists and Oral Pathologists in the past. Adenomatoid odontogenic tumor is a benign hamartomatous slow growing neoplasm of epithelial origin composed of odontogenic epithelium in a variety of histoarchitectural patterns, embedded in a mature connective tissue stroma and ch...

Adenomatoid odontogenic tumor is a relatively uncommon distinct odontogenic neoplasm. It is an uncommon tumor of odontogenic origin with varying number of ductlike structures and inductive changes in the stroma. It is a benign and slow growing epithelial tumor and represents 3% of all odontogenic tumors. Its occurrence is more common in anterior region of the maxilla than mandible. Most of the ...