PMC9876704_01
Chest computed tomography showing nodular and granular shadows in the right upper lobe. (A) At the time of the diagnosis. (B) At the time of the first examination in our hospital.
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Chest computed tomography (CT) performed at another hospital for a close examination detected nodular and granular shadows suggestive of lung tuberculosis in the right upper lobe (Fig. 1A). CT showed nodular and granular shadows in the right upper lobe, along with no findings suggestive of interstitial pneumonia (Fig. 1B). Chest shadows slightly improved compared with those confirmed at the diagnosis.
Fat-suppression T2 images of magnetic resonance imaging showing a linear and reticular high signal in the thigh muscles (arrows).
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Since the patient complained of mild grasp pain in his thighs, MRI of the lower extremities was performed, and fat-suppression T2 imaging showed a linear and reticular high signal, suggestive of vasculitis in the thigh muscles of both sides (Fig. 2).
A histopathological examination of the right biceps femoris showing monocyte infiltration around the small vessels (arrowhead) and fibrinoid necrosis of the vessel walls (arrow) (Hematoxylin and Eosin staining, x10).
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A histopathological examination revealed monocyte infiltration around the small vessels and fibrinoid necrosis of the vessel walls (Fig. 3).