The adenomatoid odontogenic tumor (AOT) is a relatively uncommon lesion which mainly affects females in their second decade of life, exhibiting predilection for the anterior region of the maxilla. The lesion is usually associated with the crown of an enclosed tooth, most commonly the maxillary canine. In this paper we present a case of adenomatoid odontogenic tumor associated with a dentigerous...

The adenomatoid odontogenic tumor (AOT) is usually an asymptomatic slow growth lesion. When grown, one can palpate a hard and large lesion. It is common for the tumor to cause shifting of neighboring teeth because tumor expansion is more common than teeth root resorption. Radiographically, there is a unilocular mass involving an unerupted tooth, sometimes opaque in the center and sclerotic in t...

Introduction: The term collision tumor refers to the coexistence of two histologically distinct neoplastic tumors within the same mass. Collision tumor of the thyroid (also referred to as tumor-to-tumor metastasis) with metastatic colorectal carcinoma to a preexisting thyroid adenomatoid nodule is rare. Preoperative diagnosis of this disorder is exceedingly difficult. This report highlights the...

Adenomatoid tumor is a benign mesothelial neoplasm of the paratesticular region in males but can also occur in female genital tracts. The epididymis is the most common site of involvement and constitutes 32% of paratesticular neoplasms. We diagnosed a case of adenomatoid tumor on cytopathology in 24 years old male, who presented with mass lesion right epididymis since 2 months. The diagnosis wa...

Adenomatoid tumors are rare benign neoplasms that normally occur in the scrotum. The clinical symptoms and routine examinations mean that it is difficult to distinguish adenomatoid tumors from malignant intratesticular solid tumors, which may result in unnecessary orchidectomies. The present report describes two adenomatoid tumor patients treated between 2006 and 2013 at the Peking University S...

Adenomatoid tumor (AT) is an extremely rare benign tumor in the testis of infants. A case of 14-month-old boy with testicular adenomatoid tumor was reported in this study. On physical examination, a smooth solid nodule sized 8 mm could be palpated with little tenderness on the head of the right testis. It could be clearly revealed by B ultrasonic scanning and computerized tomography. The patien...

The adenomatoid odontogenic tumour is a relatively uncommon lesion which mainly affects females in their second decade of life. It exhibits a predilection for the anterior region of the maxilla. The lesion is usually associated with the crown of an embedded tooth, most commonly the maxillary canine. In this paper, we present a case of adenomatoid odontogenic tumor affecting the left maxillary r...

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...

The adenomatoid odontogenic tumor is a relatively uncommon lesion which mainly affects females in their second decade of life, exhibiting predilection for the anterior region of the maxilla. The lesion is usually associated with the crown of an enclosed tooth, most commonly the maxillary canine. In this paper we present a case of adenomatoid odontogenic tumor associated with a dentigerous cyst ...