The "Ant-farm"-like Appearance of Restricted Lower Limb Vasculitis on Fluorodeoxyglucose-positron Emission Tomography

Restricted lower limb vasculitis is a type of localized muscle vasculitis limited to the lower limbs. The usefulness of fluorodeoxyglucose-positron emission tomography (FDG-PET) for the diagnosis of this entity has not yet been reported. We herein report three patients with a fever and persistent lo...

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Published in:Internal Medicine 2022/03/15, Vol.61(6), pp.897-902
Main Authors: Yamamoto, Shintaro, Mukai, Tomoyuki, Fujita, Shunichi, Koide, Yuka, Ono, Yumika, Inubushi, Masayuki, Nishimura, Hirotake, Munekane, Asami, Morita, Yoshitaka
Format: Article
Language:English
Subjects:
Case Report
FDG-PET
Fever
Fluorodeoxyglucose F18
Humans
Internal medicine
Limbs
Lower Extremity - diagnostic imaging
Magnetic resonance imaging
muscle vasculitis
myalgia
Positron emission tomography
Positron Emission Tomography Computed Tomography - methods
Radiopharmaceuticals
restricted lower limb vasculitis
Tomography
Vasculitis
Vasculitis - diagnostic imaging
Vasculitis - pathology
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container_title Internal Medicine
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creator Yamamoto, Shintaro
Mukai, Tomoyuki
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Morita, Yoshitaka
description Restricted lower limb vasculitis is a type of localized muscle vasculitis limited to the lower limbs. The usefulness of fluorodeoxyglucose-positron emission tomography (FDG-PET) for the diagnosis of this entity has not yet been reported. We herein report three patients with a fever and persistent lower limb pain. FDG-PET revealed linear and patchy FDG uptakes in their lower limbs. Combined with magnetic resonance imaging and histological findings, they were diagnosed with lower limb vasculitis. Linear and patchy FDG uptakes are considered to reflect the presence of muscle vasculitis. The characteristic "ant-farm"-like FDG-PET images can be a diagnostic clue for the currently overlooked vasculitis.
doi_str_mv 10.2169/internalmedicine.8016-21
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subjects Case Report
FDG-PET
Fever
Fluorodeoxyglucose F18
Humans
Internal medicine
Limbs
Lower Extremity - diagnostic imaging
Magnetic resonance imaging
muscle vasculitis
myalgia
Positron emission tomography
Positron Emission Tomography Computed Tomography - methods
Radiopharmaceuticals
restricted lower limb vasculitis
Tomography
Vasculitis
Vasculitis - diagnostic imaging
Vasculitis - pathology
title The "Ant-farm"-like Appearance of Restricted Lower Limb Vasculitis on Fluorodeoxyglucose-positron Emission Tomography
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