Neurological dilemmas

The disease is of long duration; to connect, therefore, the symptoms which occur in its later stages with those which mark its commencement, requires a continuance of observation of the same case, or at least a correct history of its symptoms, even for several years.

James Parkinson (1755-1824) An essay on the shaking palsy

In general practice there are many neurological problems that present a diagnostic dilemma with some being true masquerades for the non-neurologist. This applies particularly to various seizure disorders, space-occupying lesions in the cerebrum and the cerebellum, demyelinating disorders, motor neurone disorders and peripheral neuropathies.

The most common pitfall that occurs with neurological disorders is misdiagnosis, and the most common reason for misdiagnosis is an inadequate history. Failure to appreciate the neurological meaning of points elicited during the history is another reason for misdiagnosis. Some very important neurological disorders are presented in this section: Parkinson's disease, which is common and can be easily misdiagnosed especially when the classic 'pill rolling' tremor is absent or mild; multiple sclerosis (MS), because it is difficult to diagnose initially; and acute idiopathic demyelinating polyneuropathy (Guillain-Barre syndrome), because it can be rapidly fatal if misdiagnosed. MS can masquerade as almost anything—'If you don't know what it is, think of MS.' Another brain teaser for the family doctor is to diagnose accurately the various types of epilepsy. The most commonly misdiagnosed seizure disorders are complex partial seizures or atypical generalised tonic clonic seizures (see Chapter 50). 1 Even more difficult is the differentiation of real seizures from pseudo- or non-epileptic seizures.

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