PMC9132464_01
An ulcerated tumor located in the anterior of the vertex, fixed to the floor.
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In the examination of the patient, who had a history of coronary artery disease and gastric cancer, a 6.8 x 6.5 x 1 cm middle ulcerated, hyperemic, nonpigmented, fixed lesion was found in the anterior of the vertex (Figure 1).
Gross invasion extending to the cranium in the tumor center.
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It was observed that the tumor invaded the parietal bone in the center (Figure 2).
Lobular proliferation is seen. H&E; original magnification, x100.
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Most of the tumor consisted of small cells with eosinophilic staining and high nucleus/cytoplasm ratio (Figure 3).
PMC9132464_02
Mobile, hyperemic tumor located in the left temporal region.
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In the examination, a smooth bordered, hyperemic, hair-free, and mobile 2 x 2 x 1 cm nodular lesion was detected in the left parietal region (Figure 4).
Basaloid cells with palisading in the peripheral areas of lobules are present. H&E; original magnification, x100.
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The tumor cells were malignant, with eosinophilic staining, pleomorphism, dark nuclei, and large cell groups in places (Figure 5).
PMC9132464_03
Infected and ulcerated tumor located in the right occipital region.
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There was no palpable LAP in the neck (Figure 6).
Marked anaplasia and atypical mitosis are seen. H&E; original magnification, x400.
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Tumor cells showed irregular nuclear contours, hyperchromasia, and high mitotic activity with atypical mitotic figures (Figure 7).
PMC9132464_04
Tumor located in the right parietal region, with multiple ulcerated areas on it.
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In the examination, a mobile, multilobulating, hair-free mass of 6.5 x 5 x 3 cm with irregular borders and ulcerations in places, was detected in the right temporoparietal region (Figure 8).
On low power, pushing border and trichilemmal keratinization. H&E; original magnification, x40.
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Histopathological examination revealed proliferative keratinocytes surrounding the trichylememal type keratinous material (Figure 9).