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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.

The display size adjusts to suit the monitor size. Information about a medical condition is entered via the Add/Update/Remove function.

Now and then the internal mathematics just can’t quite produce a short list without an odd disease on it.  The above entry is for Guillain-Barre Syndrome. This had caused such a headache, appearing on so many short lists, that the concept of ‘Symptom Group’ in this record was invented. It means this: unless the inquiry contains a symptom/sign/even part of the “paralysis” symptom group, don’t include this on a short list. From memory this is the one and only disease pattern (so far) that needed this included.

To understand what a specific input field is intended to achieve, hover mouse over that field.

You can modify or add entries. You can use another update function to predefine symptoms and signs and events and give them aliases. These form the Selection List. However, any symptom/sign/event part of the symptom/sign pattern not predefined is included in the Selection List also. It is quicker for 5GL-Doctor analysis to have these predefined. The aliases are used to find entries on the Selection List. Some people prefer English description, others a medical word.

Spelling is chosen at installation time. USA/International spelling used in the above display.

Any display can be printed asis (but you may need to adjust your window size to suit your printer page width).

Not all symptoms/signs/events associated with a medical condition are defined in the patterns, only the ones that provide the best clues to diagnosis. Some symptoms/signs are in so few patients these are usually left out, but are likely included in the actual description.

If you substantially modify the supplied databases you do need to keep a backup of the c:/5GLDirnn where ‘nn’ is the version number. Computers do have hiccups. You don’t want to lose weeks of work, even days really. To put an entry together well can take much time and you don’t want to repeat the process - take backups.  If you mess up the database, easiest thing is to copy the backup database across to 5GLDirnn. There are number of such files explained in the documentation specifically the medical conditions, drugs, labs, dictionary, help file which you can modify too, and brain/psyche/mind symptoms. A few smaller ones not so critical such as Rules and a temporary patient records storage. The drugs database contains mainly generic entries, but you can associate such with specific brand names (a few common brand names included). Also bear in mind this is only a 2 year license. After that, you will need to install again but you can keep your existing databases if you want to.

How many medical entries? Hard to be certain because most diseases have more than one name and these are included in the entry itself. The end result is a truly huge list of diseases. In addition, some main entries contain hundreds of sub entries. Genetic and congenital disorders for example. Or chemical exposure. While many are distinct entries, many are not and are included under a few main entries. Obviously, if you are a medical person who needs that information you may want to separate such larger entries.

The display below is of some conditions that start with a. Even if you have a very large monitor a small portion of conditions starting with a’s would still only show. The reason it is impossible to clearly explain how many conditions are in the database. Probably not that many of the extremely extremely extremely rare conditions. (Or such are covered in major entries). Some entries are only about providing an overview. Hence Abdominal Swelling may list the main causes. Abscess may do so as well. Even if we missed a condition that is not so extremely rare, you can add it yourself of course.