Fibromyalgia and chronic fatigue syndrome are considered separate but related disorders.

It is a separate, distinct disorder from classic hereditary hemochromatosis.

It has been suggested that this is not a separate disorder, but the final result of several vascular systemic disorders.

Apraxia of speech (now considered a separate disorder in itself)

If it's an obsession due to escapism, is it a separate disorder or a symptom of something like depression?

Others believe that it is a separate disorder.

Although these conditions share similar symptoms, they are separate, distinguishable disorders.

Net addiction is not accepted as a separate disorder by all in the medical community.

Hypochondria came to be seen as a separate disorder.

The patterns certainly look as if they could be two separate disorders, with similar symptoms but different causes.