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A man aged 37 years presented with hip osteoarthritis with avascular femoral head necrosis due to chronic alcohol use. He had spinal arteriovenous fistula (AVF) which was diagnosed with spinal angiography (figure 1A, B) and spinal MRI (figure 2) 30 years prior. The lesion was not completely treated by surgical intervention at that time. On examination, Valsalva manoeuvre showed a reversible and rapid change in colour of his unilateral chest wall (figure 3A, B and video 1). Contrast-enhanced CT of the chest on the same location revealed cutaneous vascular malformation (figure 4). The dermatome level exactly also corresponded to the dermatome level of spinal AVF.
Valsalva manoeuvre can augment neurological symptoms in intraspinal neurological process such as a large disc, tumour or spinal AVF.1 Symptoms of spinal AVF usually involve leg weakness or paraparesis (96%), sensory numbness or paresthesias (90%), urinary incontinence or retention (82%) and pain (55%).2
According to the previous report, the spinal cord symptoms were reported to be aggravated and precipitated by Valsalva manoeuvre, trauma, pregnancy, postural changes, increase in body temperature or muscular effort.3
The finding seen in our patient can be explained by the transient congestion of blood flow induced by rapid increase in intrathoracic pressure by the manoeuvre on top of the cutaneous and spinal anomalous vascular flow.
To the best of our knowledge, this is the first case of the unique physical finding elucidated by Valsalva manoeuvre. This report also suggests a new aspect of Valsalva manoeuvre.
Valsalva manoeuvre can augment neurological symptoms in intraspinal neurological process such as a large disc, tumour or spinal arteriovenous fistula.
The spinal cord symptoms were reported to be aggravated and precipitated by Valsalva manoeuvre, trauma, pregnancy, postural changes, increase in body temperature or muscular effort.
A reversible and rapid change in colour of unilateral chest wall with Valsalva manoeuvre can be a key to suspect vascular malformation.
Contributors All authors conceived the paper. KH, TS and TH supervised the paper. All authors participated in writing of the paper, and TS approved the final version.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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