Background: The gastrointestinal tract which extends from the esophagus to anus is a common site for numerous pathological processes non-neoplastic, pre-neoplastic, neoplastic. Gastrointestinal tumors including both benign and malignant are major cause of morbidity mortality worldwide. Endoscopy in combination with endoscopic biopsy plays an important role detecting early cancers and/or high-gr...

Neoplasms progress to cancer through a process of natural selection. The rate of evolution, and thus progression is determined by three parameters: mutation rate, population size of the evolving neoplastic cells, and intensity of selection or rate of clonal expansion. All three parameters are reviewed in the context of Barrett's esophagus, a pre-malignant neoplasm. Although Barrett's esophagus ...

"Pseudo" (or secondary) achalasia is a rare entity that it isn't easily distinguishing from idiopathic achalasia by manometry, radiological examination and endoscopy. Usually a neoplastic process of the esophago-gastric region is associated with this clinical condition. However, it has been reported that other neoplastic processes may lead to the development of pseudoachalasia, such as mediasti...

The differential diagnosis of multiple ring-enhancing intraaxial lesions includes neoplastic, infectious, inflammatory, demyelinating and vascular lesions. We report a case of a 41-year-old man who presented with a brief history of left lower extremity weakness and sensory loss. Magnetic resonance imaging demonstrated multiple ring-enhancing lesions in the right frontal and ...

introduction calcifying odontogenic cyst (coc) is an uncommon odontogenic lesion, classified in two variants: the cystic variant and neoplastic (solid) variant. case presentation this case report presents multiple coc, which involved the maxillary bone and sinus in a 30-year-old man. several of these lesions were cystic, while the others were neoplastic in type, and the lesions were removed sur...

In this comparative review, histomorphological features of common nonneoplastic and neoplastic hepatocyte lesions of rats and humans are examined using H&E-stained slides. The morphological similarities and differences of both neoplastic (hepatocellular carcinoma and hepatocellular adenoma) and presumptive preneoplastic lesions (large and small cell change in humans and foci of cellular alterat...

introduction: laryngeal dysfunction may be divided into three categories; organic, neurologic and functional disorders. dysphonia and hoarseness are the most common symptoms and, in some cases, the only signs of laryngeal dysfunction. in differential diagnosis of any type of chronic hoarseness, a neoplastic process must be considered and, thus continuous light video laryngoscopy can provide imp...