A medical condition is being discussed in relation to its diagnosis. It is mentioned that certain symptoms associated with this condition can appear years before the actual diagnosis is made. Further information is available from the source, El País, which includes an image related to the topic.

The image is accompanied by a description of the condition, but details are limited in this brief. For more information on the condition and its symptoms, readers can refer to the original source, which provides additional context and details on the topic, including the time frame in which symptoms can appear before diagnosis.