lung tumors of different histologies and apparent sites of origin. Hematite-210Po produces combined epidermoid and adenocarcinomas in the peripheral lung, while BP-hematite produces mainly epidermoid carcinomas of the major bronchi and trachea. To determine whether cells in the lung are differentially sensitive to the two types of carcinogen or whether the carcinogens are reaching and acting at...

The determination of a unicellular or a multicellular origin of a tumor is an important due for understanding its etiology. To investigate this issue, we performed clonality assay of cervix cancer using polymerase chain reaction based on highly polymorphic locus of the androgen receptor gene, in which methylation of DNA correlates with inactivation of X chromosome. DNA samples were obtained fro...

for umbilical signs in adults (i.e., umbilical hernia, metastatic tumour, endometriosis, congenital abnormalities and gallstones retained or spilled at the umbilicus), the differential diagnosis should include epidermoid cyst arising from the skin of the umbilicus. Indeed, to determine the most appropriate treatment for patients with umbilical signs or symptoms, physicians should be aware that ...

Epidermoid cysts are common benign lesions of hair-bearing, and less often glabrous skin. They can also occur in oral mucosa and internal organs. In case of cutaneous lesions, an epidermal punctum is a clinical diagnostic hallmark. The clinical presentation is variable leading to some differential diagnoses. Diagnosis of epidermoid cysts needs histopathological confirmation - not only of the po...

Intramedullary spinal epidermoid cysts are benign ectopic embryological growths with reported incidence of less than 1% of intramedullary tumors. In this case we report an unusual cervical intramedullary epidermid with liquid contents. A 40-year-old patient presented with progressive weakness of all four limbs of four months duration, bowel and bladder disturbances of two days duration, pain an...

Dermoid cysts are malformations that are rarely observed in the oral cavity. Histologically, they can be further classified as epidermoid, dermoid or teratoid. We report a case in which a 25-year-old man developed an epidermoid cyst presenting as a large sublingual swelling causing speech and swallowing difficulties. The differential diagnosis for dermoid cysts includes infections, tumours, muc...

This study demonstrates the use of diffusion-weighted MR imaging in improving the specificity of the diagnosis of extraaxial brain tumors. Three surgically proved lesions (one arachnoid cyst and two epidermoid tumors) and two nonsurgically proved lesions (arachnoid and ependymal cysts) were evaluated with T1- and T2-weighted spin-echo studies followed by intravoxel incoherent motion (IVIM) MR i...

BACKGROUND Epithelial splenic cysts (ESC) are uncommon lesions of the spleen. The etiopathogenesis of these cysts is controversial, even if Burrig's theory is the most accredited. The histological distinction between epidermoid and mesothelial cysts may be difficult, particularly for monostratified epithelium. PATIENTS AND METHODS In the period between January 1986 and February 2004, 11 patie...

INTRODUCTION Epidermoid cysts represent common benign tumors occurring anywhere in the body but very rarely in the penis. Only a few cases of penile localization have been reported in the literature so far, most of them being congenital and/or idiopathic, usually presenting in children as slow-growing, solitary, well-delimited cystic lesions. Here, we describe the case of a patient with a penil...

Thymic epidermoid cysts are an extremely rare entity. These arise from epidermal cells that migrate to the thymus. The radiologic diagnosis of this rare lesion is challenging. We describe a case of an otherwise healthy 35-year-old woman who presented with an acute onset of chest pain and shortness of breath. She was found to have an anterior mediastinal mass. The imaging findings were, however,...