Oct 19 (Reuters) – Disc Medicine said on Monday its experimental pill for a rare disease that causes extreme pain from sunlight met all of its main and secondary goals in a late-stage trial, sending its shares surging 65% in premarket trading. Here are some details: • The company was testing bitopertin as a treatment for erythropoietic protoporphyria (EPP), a blood disorder that makes patients extremely sensitive to sunlight • The conditio…