PMC6393827_01
Clinical pictures of the cat. (a) At presentation the distal limb was swollen, with thick, adherent black-to-red crusts and multifocal round ulcers. (b) Following cleaning of the leg, swelling was more evident, there were multiple ulcers and haemorrhage was more severe in the dorsal distal carpometacarpal area
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PMC6393827_01_10.1177_2055116919831857-fig1.jpg
fig1-2055116919831857
The skin had adherent black crusts on the dorsum of the right paw and interdigital spaces (Figure 1).
Cat, haired skin: deep dermis. Group of newly formed vessels with predominance of capillaries lined by one layer of plump reactive endothelial cells admixed with one arteriole (arrow). Haematoxylin and eosin stain
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PMC6393827_01_10.1177_2055116919831857-fig2.jpg
fig2-2055116919831857
The mid- and deep dermis and panniculus contained abnormally elevated numbers of vessels of various calibre (Figure 2), with dilated and tortuous profiles and with irregularly thickened walls (Figure 3) and multifocally occluded by fibrin thrombi (Figure 4).
Cat, haired skin: mid-dermis. Abnormally elevated numbers of capillaries lined by one layer of plump reactive endothelial cells expanding interfollicular areas and surrounding hair follicles and adnexa. Haematoxylin and eosin stain
10.1177_2055116919831857-fig3.jpg
PMC6393827_01_10.1177_2055116919831857-fig3.jpg
fig3-2055116919831857
The mid- and deep dermis and panniculus contained abnormally elevated numbers of vessels of various calibre (Figure 2), with dilated and tortuous profiles and with irregularly thickened walls (Figure 3) and multifocally occluded by fibrin thrombi (Figure 4).
Cat, haired skin: mid-to-deep dermis. Abnormal increase of vessels characterised by multifocal mural necrosis, micro-haemorrhage, fibrinoid-to-leukocytoclastic vasculitis and variably occluded by fibrin thrombi. Haematoxylin and eosin stain
10.1177_2055116919831857-fig4.jpg
PMC6393827_01_10.1177_2055116919831857-fig4.jpg
fig4-2055116919831857
The mid- and deep dermis and panniculus contained abnormally elevated numbers of vessels of various calibre (Figure 2), with dilated and tortuous profiles and with irregularly thickened walls (Figure 3) and multifocally occluded by fibrin thrombi (Figure 4).