PMC8579583_01
Left image showing violaceous plaques before external beam radiotherapy and right image showing hyperpigmentation following external beam radiotherapy
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F1
Cutaneous examination revealed multiple, discrete, violaceous plaques measuring 0.5 cm x 0.5 cm to 3 cm x 2 cm over the trunk, face [Figure 1, left one], neck, and both upper extremities [Figure 2]. The patient's facial lesions had resolved with hyperpigmentation including oral lesions, but lesions over the trunk and limbs were present [Figure 1 right one].
Violaceous plaques measuring 0.5 cm x 0.5 cm to 3 cm x 2 cm over the neck, trunk (anterior and posterior), and both upper extremities
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F2
Cutaneous examination revealed multiple, discrete, violaceous plaques measuring 0.5 cm x 0.5 cm to 3 cm x 2 cm over the trunk, face [Figure 1, left one], neck, and both upper extremities [Figure 2].
Erythematous plaque over the left tonsillar fossa and posterior pharyngeal wall
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F3
On oral examination, there were erythematous plaques over the left tonsillar fossa and posterior pharyngeal wall [Figure 3].
Irregularly distributed vascular channels, low-power view (x10), hematoxylin and eosin stain
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F4
Histopathological examination showed irregularly distributed vascular channels, some of which were surrounding preexisting vessels, with jagged outline throughout the dermis and were lined by a single layer of endothelial cells, cords, and clumps of spindle cells between dermal collagen bundles, with cells having plump vesicular nuclei [Figure 4].