What is the pelvic lymph node normal size? Determination from normal MRI examinations

Ramirez, Marjorie; Ingrand, Pierre; Richer, Jean‐Pierre; Herpe, Guillaume; Vesselle, G.; Boucebci, S.; Tasu, J.P.

doi:10.1007/s00276-015-1581-x

Cited by 16 publications

(11 citation statements)

References 26 publications

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“…To our knowledge, this is the first report regarding preoperative LN evaluation with ultrasound for EMPD in the genital area. The longitudinal and transverse diameters of non‐metastatic LN in our study were larger than those of normal inguinal LN in the previous report, suggesting that regional LN are usually enlarged by inflammation in the primary lesion. However, longitudinal and transverse diameter alone is insufficient to distinguish between metastatic and non‐metastatic LN.…”

supporting

confidence: 73%

Preoperative ultrasound evaluation of lymph nodes for extramammary Paget's disease in the genital area

Omodaka

Kiyohara

Uematsu

et al. 2019

The Journal of Dermatology

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supporting

confidence: 73%

Preoperative ultrasound evaluation of lymph nodes for extramammary Paget's disease in the genital area

Omodaka

Kiyohara

Uematsu

et al. 2019

The Journal of Dermatology

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“…Attempts have been made to define different upper size limits of normal lymph nodes for the different abdominal and pelvic territories [9]. The most recent study in this series demonstrated a 1.5 T MRI-determined threshold for suspicious mesorectal nodes of 4 mm and 6 or 7 mm for all other pelvic territories [10]. The mean sizes of normal lymph nodes in this study varied between 2.6 and 3.9 mm.…”

Section: Current Imagingmentioning

confidence: 53%

Magnetic resonance imaging at ultra-high magnetic field strength: An in vivo assessment of number, size and distribution of pelvic lymph nodes

et al. 2020

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The definition of an in vivo nodal anatomical baseline is crucial for validation of representative lymph node dissections and accompanying pathology reports of pelvic cancers, as well as for assessing a potential therapeutic effect of extended lymph node dissections. Therefore the number, size and distribution of lymph nodes in the pelvis were assessed with highresolution, large field-of-view, 7 Tesla (T) magnetic resonance imaging (MRI) with frequency-selective excitation. Materials and methods We used 7 T MRI for homogeneous pelvic imaging in 11 young healthy volunteers. Frequency-selective imaging of water and lipids was performed to detect nodal structures in the pelvis. Number and size of detected nodes was measured and size distribution per region was assessed. An average volunteer-normalized nodal size distribution was determined. Results In total, 564 lymph nodes were detected in six pelvic regions. Mean number was 51.3 with a wide range of 19-91 lymph nodes per volunteer. Mean diameter was 2.3 mm with a range of 1 to 7 mm. 69% Was 2 mm or smaller. The overall size distribution was very similar to the average volunteer-normalized nodal size distribution. Conclusions The amount of in vivo visible lymph nodes varies largely between subjects, whereas the normalized size distribution of nodes does not. The presence of many small lymph nodes

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“…However, these criteria are used in the clinical practice and do not depend on any imaging method. In a limited number of studies assessing size of normal inguinal lymph nodes on different imaging modalities in adults, upper limit of short axis diameter of inguinal lymph nodes varies between 7-15 mm [1,4,9,10]. The study evaluated inguinal lymph nodes in asymptomatic patients on CT revealed a mean short axis of 5,4 mm, and a value of 8,8 mm at 2 SD above the mean for all inguinal lymph nodes [1].…”

Section: Discussionmentioning

confidence: 98%

“…There have been very few studies providing information about size range and imaging characteristics of normal inguinal lymph nodes in adult age group [1,4,9,10]. However, to our knowledge, there have been neither established size criteria nor a study assessing imaging characteristics and distribution of inguinal lymph nodes on CT in children.…”

Section: Introductionmentioning

confidence: 99%

Computed tomography depiction of normal inguinal lymph nodes in children

et al. 2020

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Background: To establish computed tomography (CT) characteristics, distribution and provide normative data about size of normal inguinal lymph nodes in a pediatric population. Materials and methods: 481 otherwise healthy children (147 girls, mean age: 8,87, range 0-17 years) underwent pelvic CT in the setting of high-energy trauma were included in the study. Both axial and coronal 1,25-mm reconstructions were evaluated for the presence, location (deep or superficial), number, presence of fat attenuation, and shape of the lymph nodes, short-axis diameter of the biggest lymph node for each of right and left inguinal regions. Results: A total of 7556 lymph nodes were detected in 481 subjects [The mean count of superficial and deep inguinal lymph nodes was 13,35 (range 6-23) and 2,36 (range 0-7) per subject respectively]: 15% (1135/7556) deep located, 85% (6421/7556) superficial located, 86,6% (6547/7556) with fat attenuation, 99,2% (7496/7556) oval in shape, 0,8% (60/7556) spherical. The short-axis diameter of the lymph nodes increased with age. [Pearson's correlation coefficient; for superficial and deep lymph nodes in boys and girls, respectively; 0.538 (p<0.001), 0.504 (p<0.001), 0.452 (p<0.001) and 0.268 (p<0.001)]. The mean maximum short-axis diameters in different age groups and gender varied between 6,33±0,85 mm and 8,68±1,33 mm for superficial, 3,62±1,16 mm and 5,83±1,05 mm for deep inguinal lymph nodes. 2 Conclusions: Inguinal lymph nodes were multiple, commonly contained fat, and oval in shape. The data determined about inguinal lymph node size in different pediatric age groups may be applicable as normative data in daily clinical CT evaluation practice.

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What is the pelvic lymph node normal size? Determination from normal MRI examinations

Abstract: The mesorectum nodes should be considered as abnormal when they are over 4 mm in short diameter. For the other node areas, the upper limits of the normal range were, respectively, 6, 6, 5, 7 mm for the external and common iliac, internal, iliac and inguinal nodes for the short axis.

Cited by 16 publications

References 26 publications

Preoperative ultrasound evaluation of lymph nodes for extramammary Paget's disease in the genital area

Preoperative ultrasound evaluation of lymph nodes for extramammary Paget's disease in the genital area

Magnetic resonance imaging at ultra-high magnetic field strength: An in vivo assessment of number, size and distribution of pelvic lymph nodes

Computed tomography depiction of normal inguinal lymph nodes in children

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