The urachus is an intra-abdominal fibrous remnant of the allantois. The non-involution of the allantois can result in urachal anomalies. The abnormal appearance of the umbilicus may be a sign of such ...

Goodpasture syndrome is a very rare and potentially life-threatening autoimmune disease that damages both the lungs and the kidneys. It is also sometimes known as Goodpasture disease or ...

The bubonic plague is something we associate with the Dark Ages, when tens of millions were killed in the wake of the “Black Death,” which swept across Asia, Africa, and Europe in the 14th century.