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.
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. GISTs arise in the smooth muscle pacemaker interstitial cell of Cajal, or similar cells.They are defined as tumors whose behavior is driven by mutations in the KIT gene (85%), PDGFRA gene (10%), or BRAF kinase (rare). 95% of GISTs stain positively for KIT (CD117).ISTs are tumors of connective tissue, i.e. sarcomas; unlike most gastrointestinal tumors, they are non epithelial. About 70% occur in the stomach, 20% in the small intestine and less than 10% in the esophagus.