A paraumbilical (or umbilical) hernia is a hole in the connective tissue of the abdominal wall in the midline with close approximation to the umbilicus. If the hole is large enough there can be protrusion of the abdominal contents, including omental fat and/or bowel. These defects are usually congenital and are not noticed until they slowly enlarge over an individuals life time and abdominal contents herniate through the hole creating either pain or a visible lump on the abdominal wall. If abdominal contents get incarcerated (or stuck) in the hole this can cause pain. If the abdominal contents become strangulated by losing their blood supply from pinching or twisting those tissue will die. If it is omental fat this will cause pain and could potentially lead to an infection. If the strangulated contents are bowel then in addition to pain the individual will develop a bowel obstruction. And if the dead bowel is not surgically removed in an emergent fashion the condition could be fatal. Treatment
There is no medical treatment to cure a hernia. It requires surgical intervention which involves closing the hole. If the hole is very small this can sometimes be accomplished by simply reapproximating the connective tissue. However for best long term success most hernias require a permanent barrier to cover the defect much like repairing a hole in a tire. This material is commonly referred to as mesh and can be made of different substances depending on the brand.
Idiopathic pneumonia syndrome is a set of pneumonia-like symptoms that occur with no sign of infection in the lung. Idiopathic pneumonia syndrome is a serious condition that can occur after a stem cell transplant. It occurs between 2.2 and 15 percent of hematopoietic stem cell transplants. The incubation period ranges between 4 and 106 days, but mostly is about 22 days from transplant. Symptoms
The symptoms are like pneumonia, and include fever, chills, coughing, and breathing problems. Lack of oxygen may also occur. Risk factors
Risk factors for IPS can be old age, graft vs host disease, multi organ failure, and multiple organ failure. Diagnosis
Treatment
Treatment is only supportive, with steroids showing no effect. The need for mechanical ventilation is indicative of a poor prognosis. Steroids are often used, though often without effect. References

Idiopathic pneumonia syndrome entry in the public domain NCI Dictionary of Cancer Terms This article incorporates public domain material from the U.S. National Cancer Institute document: "Dictionary of Cancer Terms".