Power Doppler sonography of normal cervical lymph nodes.

Ying, Michael; Ahuja, Anil T.; Brook, Fiona; Metreweli, Constantine

doi:10.7863/jum.2000.19.8.511

Cited by 60 publications

(37 citation statements)

References 23 publications

(19 reference statements)

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“…Published studies on color and power Doppler of normal lymph nodes have reported the visualization of the hilar vessels and, on occasion, visualization of the principal perihilar branches. 9,11,12 In a recent study of normal cervical lymph nodes, Ying et al 11 found no vascularity in more than half of the nodes that had a maximum transverse diameter between 2 and 4 mm.…”

Section: Discussionmentioning

confidence: 99%

High‐sensitivity power Doppler imaging of normal superficial lymph nodes

Stramare

Tregnaghi

Fittà

et al. 2004

J of Clinical Ultrasound

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Section: Discussionmentioning

confidence: 99%

High‐sensitivity power Doppler imaging of normal superficial lymph nodes

Stramare

Tregnaghi

Fittà

et al. 2004

J of Clinical Ultrasound

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“…Recently, some authors [1,2,3,4,5] have suggested use of power Doppler sonography for the differential diagnosis of lymphadenopathies. They maintain that power Doppler sonography displays tiny intranodal vessels better than color Doppler sonography; however, there are no studies which prove this hypothesis.…”

Section: Introductionmentioning

confidence: 99%

Differential diagnosis of lymphadenopathy: power Doppler vs color Doppler sonography

2002

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Our objective was to compare color and power Doppler sonography of superficial lymph nodes. One hundred ninety-three lymph nodes in 161 patients were assessed by color and power Doppler sonography using standardized settings. We tested which modality displayed more intranodal vessels and checked if these differences would have altered the diagnosis. Additional vessels were seen by color Doppler sonography in 18 nodes and by power Doppler sonography in 58 nodes. Amongst those nodes were 15 nodes which showed no vascularization in color Doppler sonography and 23 nodes with only few intranodal flow signals; however, the better sensitivity of power Doppler sonography had no impact on the diagnosis in 42 of 58 nodes. Diagnostic confidence was increased in 7 nodes which showed normal vessels only in power Doppler sonography, although missing flow signals were defined as a benign finding. Pathological vessels were displayed only by power Doppler sonography in 9 nodes, but 6 of these 9 results proved to be false positive. Power Doppler sonography displays more intranodal flow signals than color Doppler sonography, but the diagnostic impact is low because of an increased risk of false-positive results.

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“…[13][14][15] Normal nodes predominantly have hilar vascularity or are avascular. 16 The occurrence of vascularity in normal nodes increases with increasing size, and about 90% of normal nodes with maximum transverse diameters greater than 5 mm show hilar vascularity. 17 Reactive nodes tend to have prominent hilar vascularity 15,18 because of an increase in vessel diameter and blood flow.…”

Section: 1011mentioning

confidence: 99%

Lymph node hilus: gray scale and power Doppler sonography of cervical nodes.

Ahuja

Ying

King

et al. 2001

J of Ultrasound Medicine

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Objective. To investigate the difference in the nodal hilus evaluated by gray scale and power Doppler sonography. Methods. One hundred ninety-two patients with proven cervical lymphadenopathy were included in the study (metastases, n = 118; tuberculosis, n = 56; and lymphoma, n = 18). Lymph nodes were evaluated by gray scale sonography for the echogenic hilus and power Doppler sonography for hilar vascularity. Results. Hilar vascularity was found even though the lymph node did not show an echogenic hilus on gray scale sonography (metastases, 59%; tuberculosis, 66%; and lymphoma, 91%). Conclusions. Sonologists should be aware that gray scale and Doppler sonography show different aspects of the hilus, and the absence of the hilus on gray scale sonography does not necessarily imply an associated absence of hilar vascularity. Key words: gray scale sonography; power Doppler sonography; hilus; cervical nodes. he role of sonography in the evaluation of neck nodes is well established. Previously, sonography of lymph nodes involved only gray scale sonography, and evaluation of the nodal hilar architecture was an essential part of the examination. The absence of a hilus was usually considered an abnormality.1,2 However, to our knowledge, the sonographic literature has not addressed whether the absence of an echogenic hilus on gray scale sonography implies the absence of hilar vasculature. With power Doppler sonography (PDS), it is now possible to evaluate intranodal vasculature.In our experience, often in abnormal nodes the echogenic hilar architecture is absent on gray scale imaging (Fig. 1), but the hilar vessels are clearly shown on PDS (Fig. 2). Because this has not been emphasized in the literature, often sonologists have presumed that the absence of the echogenic hilus on gray scale sonography also implies the absence of hilar vasculature. We were therefore interested in documenting the appearance of hilar vessels so that sonologists would be aware of the differences in nodal hilar evaluation by gray scale sonography and PDS.

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Power Doppler sonography of normal cervical lymph nodes.

Cited by 60 publications

References 23 publications

High‐sensitivity power Doppler imaging of normal superficial lymph nodes

High‐sensitivity power Doppler imaging of normal superficial lymph nodes

Differential diagnosis of lymphadenopathy: power Doppler vs color Doppler sonography

Lymph node hilus: gray scale and power Doppler sonography of cervical nodes.

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