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Large databases with thousands of medical conditions (diseases) associated with a symptom/sign/event pattern. Suitable for personal or professional user. Lab analysis and drug reactions separate functions. A URL can be included to say Merck Professional, so with one click you have all the information in that URL.

This site last updated March, 2018.


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5GL-Doctor, Medical Diagnosis Aid/Expert System for Windows (32 or 64 bit), suitable for the personal or professional user. A differential diagnosis tool.

Snapshots of Symptom/Sign/Events Selection List. About 12,000 items. These include medical names and aliases. Easy to find exactly what you are looking for. You can add to the list, or it will be worked out automatically if you modify a disease symptom/sign pattern.

And if you have a few weeks to spare, and don’t mind going through the disease definitions on the database, then please email if we missed any. All known alternate names (in some cases as many as 20) are included as part of an entry. That is the reason the disease display list is simply huge. Click on an entry to access full details. (Not only a definition of a disease is in the database, but also many case studies of complex results leading to a diagnosis).