From the start to the end of the month, the length of the day increases by 1:12 hours, implying an average day-over-day increase of 2.4 minutes. The shortest day of the month is April 1 with 12:41 hours of daylight; the longest day is April 30 with 13:53 hours of daylight.
The term âeponymâ originates from the Greek word âeponymous,â which means ânamed after.â An eponym was a simple way to describe tumors and tumorlike lesions that initially were not well understood.ponyms were used as a simple way to describe different tumors and tumorlike lesions at the beginning of our understanding of those entities and to acknowledge contributions of pioneers who helped to improve our understanding.
Tumors of the Posterior Fossa. Medulloblastomas: Medulloblastomas (PNETs) are the most common malignant brain tumor in children (20% of all pediatric tumors) and usually occur in children between the ages of 4 and 10 years. Medulloblastomas occur more often in boys than in girls.ost childhood tumors (more than 60%) are located in the posterior fossa (the back compartment of the brain). This area is separated from the cerebral hemispheres by a tough membrane called the tentorium. The posterior fossa includes the cerebellum, the brainstem, and the fourth ventricle.