Pure agraphia: a discrete form of aphasia.

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Abstract
A 62 yr old, right handed man developed a pure agraphia as the result of a left temporal lobe stroke. Isolated writing disturbances persisted for 7 mo. until he had a 2nd cerebrovascular accident resulting in total aphasia and right hemiplegia. A CAT [computer assisted tomography] scan obtained 4 mo. after the 1st episode showed a localized dilatation of the posterior portion of the left Sylvian cistern and patchy areas of low absorption in the left temporal lobe. Localized damage to the language area can apparently produce a pure agraphia as the sole detectable disorder of language organization.