Yes, 99% of all cysts are benign. If the cyst is complex ( a mixture of fluid and solid) or solid (more than 50% contains solid parts) the chances of it being benign are still 85%. The odds are overwhelmingly in your favor.
Eleven of the 19 Smithsonian Institution museums and galleries are at the National Mall in Washington D.C., the open-area national park in Washington, D.C running between the Lincoln Memorial and the United States Capitol, with the Washington Monument providing a division slightly west of the center.
Your guide to the attractions in DC that are free and which require tickets. Many of Washington, DC's major attractions are open to the public and do not require tickets, including the Smithsonian museums, the Smithsonian National Zoo, the National Gallery of Art, and the monuments and memorials on the National Mall.