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Transformation from Myositis to Mycotic Aneurysm in Infective Endocarditis

 

Transformation from Myositis to Mycotic Aneurysm in Infective Endocarditis

Jun Sakai1*, Shigefumi Maesaki2 and Masahiro Kodana3

1Department of General Internal Medicine, Saitama Medical Center, Saitama Medical University, Saitama, Japan
2Department of Infectious Disease and Infection Control, Saitama Medical University Hospital, Saitama Medical University, Saitama, Japan
3Department of Laboratory Medicine, Saitama Medical University Hospital, Saitama Medical Hospital, Saitama, Japan

*Corresponding author: Jun Sakai, Department of General Internal Medicine, Saitama Medical Center, Saitama Medical University, Saitama, Japan, E-mail: junsakasaita1@gmail.com

Received: May 28, 2021; Accepted: June 06, 2021; Published: June 20, 2021

Citation: Sakai J, Maesaki S, Kodana M, et al. Transformation from Myositis to Mycotic Aneurysm in Infective Endocarditis. Clin Image Case Rep J. 2021; 3(6): 172.

Abstract

A 61-year-old man with mitral valve prolapse presented with 1-week history of fever, palmar rashes and pain over the right thenar eminence. On admission, he was found to have a pansystolic murmur and haemorrhagic macules over his palms. A painful, non-pulsatile swelling was noted at the right thenar eminence.
Echocardiography revealed a 0.6 x 0.4cm vegetation on the anterior mitral valve leaflet and severe mitral regurgitation. Magnetic resonance imaging (MRI) revealed an irregular intramuscular collection between the right 1st and 2nd metacarpals. Computed Tomography (CT) and MRI revealed scattered infarcts in the liver, kidney, spleen, and brain. Two sets of blood cultures were positive for cloxacillin-sensitive Staphylococcus aureus. Fever resolved following IV Cloxacillin.

On the 3rd-week of antibiotic treatment, the right thenar eminence swelling had enlarged and was pulsatile (Figure 1 and 2). Ultrasound and MRI confirmed the presence of right radial artery aneurysm (Figure 3 and 4). Surgical excision and repair excision was performed.
Mycotic aneurysms of the peripheral arteries are rare and can lead to significant complications e.g. haemorrhage and limb loss. To the best of our knowledge, there are very limited reports regarding transformation of myositis to mycotic aneurysm. Thus, early detection and intervention are crucial to ensure optimum outcome.

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