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2015 ; 9
(12
): e0004276
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Asymmetric Nerve Enlargement: A Characteristic of Leprosy Neuropathy Demonstrated
by Ultrasonography
#MMPMID26646143
Lugão HB
; Nogueira-Barbosa MH
; Marques W Jr
; Foss NT
; Frade MA
PLoS Negl Trop Dis
2015[Dec]; 9
(12
): e0004276
PMID26646143
show ga
BACKGROUND: Neurological involvement occurs throughout the leprosy clinical
spectrum and is responsible for the most feared consequences of the disease.
Ultrasonography (US) provides objective measurements of nerve thickening and
asymmetry. We examined leprosy patients before beginning multi-drug therapy
aiming to describe differences in US measurements between classification groups
and between patients with and without reactions. METHODOLOGY/PRINCIPAL FINDINGS:
Eleven paucibacillary (PB) and 85 multibacillary (MB) patients underwent nerve
US. Twenty-seven patients had leprosy reactions (type 1, type 2 and/or acute
neuritis) prior to US. The ulnar (at the cubital tunnel-Ut-and proximal to the
tunnel-Upt), median (M) and common fibular (CF) nerves were scanned to measure
cross-sectional areas (CSAs) in mm2 and to calculate the asymmetry indexes ?CSA
(absolute difference between right and left CSAs) and ?Utpt (absolute difference
between Upt and Ut CSAs). MB patients showed greater (p<0.05) CSAs than PB at Ut
(13.88±11.4/9.53±6.14) and M (10.41±5.4/6.36±0.84). ?CSAs and ?Utpt were similar
between PB and MB. The CSAs, ?CSAs and ?Utpt were similar between PB patients
with reactions compared to PB patients without reactions. MB patients with
reactions showed significantly greater CSAs (Upt, Ut and M), ?CSAs (Upt and Ut)
and ?Utpt compared to MB patients without reactions. PB and MB showed similar
frequencies of abnormal US measurements. Patients with reactions had higher
frequency of nerve thickening and similar frequency of asymmetry to those without
reactions. CONCLUSIONS/SIGNIFICANCE: This is the first study to investigate
differences in nerve involvement among leprosy classification groups using US
before treatment. The magnitude of thickening was greater in MB and in patients
with reactions. Asymmetry indexes were greater in patients with reactions and did
not significantly differ between PB and MB, demonstrating that asymmetry is a
characteristic of leprosy neuropathy regardless of its classification.