The Yawkey building entrance is now closed.

As of April 29, BMC’s Yawkey building doors are closed as an entrance. All patients and visitors on our main campus must enter the hospital via the Shapiro, Menino, or Moakley buildings, where they will be greeted by team members at a new centralized check-in desk. Learn more.

Histiocytic disorders those that occur when the body produces too many white blood cells. This can lead to organ damage and can cause tumors to form. There are three main types of histiocytic diseases that are defined by the types of histiocytic cells involved.