Spindle-shaped appendages of IIIab-pyramids filled with lipofuscin: a striking pathological change of the senescent human isocortex.

Brains from 30 mentally normal men, ranging in age from 18--90 years, were studied to assess the occurrence and development of lipofuscin-filled spindle-shaped appendages of pyramidal cells of the isocortex; these can generally be encountered in the senescent brain within layer IIIab. The number of pigmented spindles was determined in a circumscribed part of prefrontal area revealing a close association of this conspicuous pathological alteration with growing age.