gastric bezoars are gastric masses, which rarely cause intestinal obstruction by passing through the small bowel. in this article, we report a 56 year-old man with no history of gastric surgery who presented with intestinal obstruction. the obstruction seemed to be in terminal ileum. colonoscopy was done and a movable mass was noted, which was extracted from the cecum by colonoscope resulting i...

The auditory and vestibular endorgans of the inner ear which are essential for the senses of hearing and balance form early during development when the otocyst undergoes a period of rapid growth and compartmentalization. Here we show the spatial and temporal patterns of proliferating cells in the Xenopus laevis inner ear as this organ develops from an otic vesicle at stage 31 until stage 47, an...

Juvenile hormone (JH) is considered the prime endogenous signal for the induction of queen development in honey bees (Apis mellifera L.). At the beginning of the last (5th) larval stadium, worker corpora allata synthesize less JH than queen corpora allata as a consequence of a limited production of JH precursors and a caste- and stage-specific block of the terminal step in JH biosynthesis. As p...