26% of the brains studied (108) reveal warty extraversions which predominantly lie within the limits of the frontal lobe where they can be most frequently encountered on the lower frontal gyrus. Most of them occupy the crest of a gyrus. Only a few elongated ones can be found in the vicinity of the bottom of a sulcus. The various laminae of the cortex are subjected to variations. The molecular layer (I) contains a great number of ectopic nerve cells. Pigment-laden stellate cells and those devoid of pigment inclusions can be encountered besides a great number of various types of pyramidal cells. The nerve cells of the corpuscular layer (II) appear loosely arranged. The pyramidal layer (III) follows the curvature of the wart but appears attenuated towards its tip. Both the ganglionic layer and the multi-form layer show a lens-shaped thickening. If compared with an equal-sized part of the adjoining normal isocortex there is no numerical increase of nerve cells within the wart.
在所研究的大脑中，26%（108个）显示出疣状外向性，主要位于额叶范围内，在下额叶回最常出现。其中大多数占据脑回的嵴。只有少数细长的位于脑沟底部附近。皮质的各层存在变异。分子层（I）包含大量异位神经细胞。除了大量不同类型的锥体细胞外，还可遇到充满色素的星状细胞和不含色素包涵体的细胞。颗粒层（II）的神经细胞排列松散。锥体细胞层（III）跟随疣的曲率，但在其尖端处变薄。神经节层和多形层均呈透镜状增厚。与相邻正常等皮质同等大小的部分相比，疣内神经细胞数量没有增加。
