Mediastinal Lymph Nodes Size

METHODS--Ninety patients with non-small cell lung cancer who later underwent thoracotomy wer prospectively examined by CT scanning. gov Source: TNM Atlas, 3rd ed. N3 lymph nodes are contralateral mediastinal, ipsilateral scalene, or supraclavicular. Lung cancer typically spreads to the lymph nodes in the mediastinum. Furthermore, while other groups focus on neck and abdominal lymph nodes, we target the mediastinum, which is a region highly aected by cardiac and. This is mainly because metastases can be present in non-enlarged lymph nodes and not all enlarged nodes are malignant. All the doctors I have seen so far are completely stumped! I have had a chest surgery to biopsy the lymph nodes which ruled out Lymphoma, as well as Sarcoidosis. Lymph nodes vary in size from the size of a pinhead to the size of a lima bean. The large size of the Tc-99m MAA particle typically prevents it from entering lymphatic channels in the. Lymph Nodes of Cervix 5. 80% of nodes are adjacent to tracheo-bronchial tree; Round, oval or triangular soft tissue densities; Often found in clusters; Q1: What is the size range for normal lymph nodes? Answer. We aimed to assess the prognostic role of visible para-aortic lymph nodes (PALNs). Midline nodes are ipsilateral for both sides. cystic or necrotic nodes). Castelijns, and Gordon B. 24 In a study of mediastinal lymph nodes in 9 patients with bronchogenic carcinoma, Laissy et al 25 found peak enhancement in metastatic lymph nodes within 60 to 80 seconds after gadolinium enhancement, with a slow washout thereafter. The common location for tumors in the mediastinum depends on the age of the person. 0 cm; Tenderness to palpation.



Mediastinal masses and vessels. 1 mm in region 4, 8. Maximum size of the thymus. Each lymph node is surrounded by a fibrous capsule , which extends inside the lymph node to form trabeculae. 5 cm; Isolated Lymphadenopathy in children >1. Lymphadenopathy is swelling of your lymph nodes. The mean SUVmax of lymph nodes was 1. Many enlarged mediastinal nodes will be pathological, however not all, and conversely some mediastinal lymphadenopathy will be found in non-enlarged nodes. Enlarged axillary lymph nodes: Introduction. A mediastinal lymph node mass, located in the center of the chest, that is larger than 10 centimeters (cm) is associated with a poorer prognosis. One patient had hilar lymphadeno- pathy without evidence of a mediastinal mass (patient 3). First: Possible reasonsSome benignOthers notTalk to your physician. Twenty-three of the 44 heavy smokers (52%) showed enlarged mediastinal lymph nodes. The mean number of lymph nodes on a representative section was 1. To determine the optimum selection of mediastinal lymph nodes for biopsy in non-small cell lung cancer (NSCLC), lymph nodes with or without metastasis at each mediastinal station were ranked in size in patients with pathological N2 disease. The term "shotty" comes from that fact that they have a similar feel to buckshot or pellets. We aimed to assess the prognostic role of visible para-aortic lymph nodes (PALNs). Results: Sixty-four patients with periportal lymph nodes 10–40 mm in size met the inclusion criteria. Did you have a chest CT scan? Ask Your Own Medical Question. Generally, a normal size lymph node is less than one centimeter in diameter; however, there are exceptions in lymph nodes in different areas of the body.



Neurogenic neoplasm mediastinal tumors - cells that grow outside of the normal cell area and are not part of the surrounding tissue. These works target mediastinal [5], ab-dominal [7] and neck [4] lymph nodes while our work targets. Endobronchial ultrasound (EBUS) guided fine needle aspiration biopsy of mediastinal nodes offers a less invasive alternative for histologic sampling of the mediastinal nodes. 5 cm in longest transverse dimension must have regressed to ≤1. Diagnosis and treatment for swollen occipital lymph nodes Having swollen lymph nodes may not always be a cause for concern, but depending on the circumstance, it is worth it to have them looked at. Lymph nodes swell because they are trying to filter out the unhealthy cells. Another CT scan was done on 7/6/11 showing the primary nodual changed and is now 1. Sue Ettinger, DVM, DACVIM. Lymph nodes are important structures of the lymphatic system of the thorax and abdomen. The enlargement of the lymph nodes on the mediastinal x-ray looks like a "pathological shadow" and gives an idea of the localization of the lesion, shape, outlines, mobility, relationship with neighboring organs. 19 x 19 Cross, CE, Shaver, JA, Wilson, RJ, and Robin, ED. They function in the redistribution of fluid, as well as play an important role in the immune system of the body. Lymph Node Locations : Though lymph nodes are present throughout our body, let us see some of the important lymph nodes depending on the location. The thymus, which is a primary lymphatic organ, is also found in the anterior mediastinum. What is age related involution as it relates to the thymus.



Assess for the presence of mediastinal lymph nodes [best evaluated by CT]. 2016 2017 2018 2019 Billable/Specific Code. The primary nodual was 1. Lymph nodes often just are too small to take up enough of the sugar to really light up the PET scan. The most common symptom of lymphoma is enlarged lymph nodes. Diagram of the axillary lymph node detection system. are these the same thing. These nodes play an important role in the filtration of lymph before it is returned to circulatory system. In 2009, a new lung cancer lymph node map was proposed by the International Association. , lymphosarcoma. 80% of nodes are adjacent to tracheo-bronchial tree; Round, oval or triangular soft tissue densities; Often found in clusters; Q1: What is the size range for normal lymph nodes? Answer. PET was found to be reliable and accu-rate for detecting lymph nodes of less than 1 cm, with sensitivity and specificity of 97% and 82%,respectively. Castelijns, and Gordon B. I had the rest of my lymph nodes removed, which thankfully were clear, and now just do scans regularly and see the derm ALOT. If the cancer does return, there will be another round of tests to learn about the extent of the recurrence. 4 Lower paratracheal nodes. cat scan has mass and lymph nodes - Lung cancer CT scan shows. The lymph nodes as they contain the B and T lymphocytes.



This article will focus on the enlarged lymph nodes in lungs. Sarcoidosis. The primary nodual was 1. These works target mediastinal [5], ab-dominal [7] and neck [4] lymph nodes while our work targets. The size of each hilum is best assessed from the size of the respective basal artery, which can usually be identified on a well-penetrated radiograph (). One of the lymph nodes measures 2. Metastasis Lung Cancer with Invasion Into Spine Click on image for enlarged scan. Lymph nodes have a considerable capacity to increase in size. van den Brekel, Jonas A. They include those found in the hilum of the lungs, the juxta-oesophageal nodes, and superior and inferior tracheobronchial nodes. All the swine survived the procedure until humane killing on day 15. mediastinal and hilar lymph nodes. Tx can be as easy as an AI or as hard as a chemo. The enlargement of the lymph nodes on the mediastinal x-ray looks like a "pathological shadow" and gives an idea of the localization of the lesion, shape, outlines, mobility, relationship with neighboring organs. Of these 4 patients, 3 had mediastinal masses in the following locations: 1) periaortic area and anterior mediastinum; 2) superior or 3) subcarinal region. Lymph nodes are common site of metastatic disease Presence of metastases is important for TNM staging Must determine when examining lymph nodes: tumor present or not; tumor primary or metastatic; possible sites of primary; number of metastatic nodes; size of largest metastatic deposit often helpful; presence of extranodal or vascular involvement. 'Mapping' the Mediastinal Lymph Nodes Understanding the lymphatic drainage of the lung is obviously relevant to staging the mediastinum. METHODS We compared the MSCT findings of 89 enlarged lymph nodes due to anthracosis with 54 malignant lymph nodes (non-small cell lung cancer 75. METHODS--Ninety patients with non-small cell lung cancer who later underwent thoracotomy wer prospectively examined by CT scanning.



Using a size criterion of 1 cm or greater as evidence for abnormality, the size of mediastinal lymph nodes identified by computed tomography (CT) was a poor predictor of mediastinal lymph node metastases in a series of 86 patients who had surgery for bronchogenic carcinoma. The enlargement of the lymph nodes on the mediastinal x-ray looks like a "pathological shadow" and gives an idea of the localization of the lesion, shape, outlines, mobility, relationship with neighboring organs. Lymphadenopathy (or adenopathy) is, if anything, a broader term, referring to any pathology of lymph nodes, not necessarily resulting in increased size; this includes abnormal number of nodes, or derangement of internal architecture (e. Answers from specialists on enlarged mediastinal lymph nodes. Hi sorry to bother you. These works target mediastinal [5], ab-dominal [7] and neck [4] lymph nodes while our work targets. Lymphadenopathy refers to nodes that are abnormal in either size, consistency or number. Staging can help predict the patient is a candidate for surgery; for example, individuals with distant metastases are usually not surgical candidates. What are the aims of this leaflet? This leaflet has been written to help you to understand more about checking your lymph nodes yourself. These lymph nodes have become much rounder in shape, which also means there overall size is increased. Abnormal lymph nodes are generally easier to find because they become hypoechoic relative to the surrounding fat. Lymph nodes with a short axis diameter of 10 mm or more were considered abnormal. Lymph Node Examination (required only if lymph nodes present in specimen) Number of Lymph Nodes Involved: _____. NX Regional lymph nodes cannot be assessed N0 No regional lymph node metastases N1 Regional lymph node metastases present DISTANT METASTASIS (M). I am about to have treatment number 7 tomorrow and the lymph nodes are all but back to normal (I can still feel a itsy bitsy tiny swollen node in my neckbut only because I think I am looking for it!). –N1b = Metastasis to unilateral, bilateral, or contralateral cervical neck lymph nodes (levels I, II, III, IV, or V) or retropharyngeal lymph nodes. 1 mm in region 4, 8. Below #2 and above the upper margin of the upper lobe bronchus and on the left, medial to the ligamentum arteriosum. Most of the mediastinal nodes are in close approximation to the left innominate vein, the anterior surface of the trachea, and circumference of the main bronchi, and inferior and to the left of the aortic arch [ 1 ].



Companion Sites; Site Maps: Gray Companion Sites: Site Map: Refuting ID: Site Maps: White Companion Sites: Site Maps: Black Companion Sites: Links. 2 mm in region 5. Snow PURPOSE: A definition of cut-off points for nodal size is essential to determine whether cervical lymph nodes are metastatic or not. including lymph node regions. Which lymph nodes are swollen can help identify the problem. Common areas where lymph nodes are located include the neck, under the jaw and chin, behind the ears, on the back of the head, the armpits and the. 4 in region 4, 1. 0 cm, lobulated Rt. Pathology. Dudea et al Ultrasonography of superficial lymph nodes: benign vs. Twenty-three of the 44 heavy smokers (52%) showed enlarged mediastinal lymph nodes. However, carcinoma detected only in mediastinal or hilar lymph nodes is rare. If the cancer does return, there will be another round of tests to learn about the extent of the recurrence. Level VII: Upper mediastinal nodes. First: Possible reasonsSome benignOthers notTalk to your physician. Lymph nodes vary in size from the size of a pinhead to the size of a lima bean. Did you have a chest CT scan? Ask Your Own Medical Question.



Single or localized lymph nodes may suggest a local infection, although even isolated enlarged supraclavicular, axillary, or epitrochlear lymph nodes have a greater probability of malignancy [3, 4]. Rock-hard nodes: Metastatic cancer. METHODS--Ninety patients with non-small cell lung cancer who later underwent thoracotomy wer prospectively examined by CT scanning. 2 mm in region 5. sam, sorry to see you posting. Establishment of an upper limit for node size by specific location, analogous to that which has been reported for mediastinal lymph nodes, was sought. They include those found in the hilum of the lungs, the juxta-oesophageal nodes, and superior and inferior tracheobronchial nodes. 87 in the group with positive mediastinal lymph node on PET/CT but patholo-gically benign lymph nodes whereas it was 5. What is age related involution as it relates to the thymus. Lymphadenopathy of an inflammatory type (the most common type) is lymphadenitis , [1] producing swollen or enlarged lymph nodes. Seasonal allergies do not cause lymph nodes to become swollen. According to the Pulmonologist, in June 2008, my CT scan should absolutely nothing - my lungs were clear!. Staging can help predict the patient is a candidate for surgery; for example, individuals with distant metastases are usually not surgical candidates. For the interpretation of the CT findings, the mediastinal lymph nodes were divided in two categories: those with a diameter of less than 1 cm in the shortest axis were considered normal in size. Lymph node variables included total number of enlarged lymph node stations, pattern of lymph node enlargement (mediastinal/hilar or both, unilateral vs bilateral) and largest lymph node size (mm).



There is a limited amount of work di-Fig. The mean number of lymph nodes on a representative section was 1. Lymph nodes swell because they are trying to filter out the unhealthy cells. 5 cm; Inguinal Lymphadenopathy >1. The nodes should then not exceed 1 cm in the widest dimension. Lymphadenopathy can occur in one or more areas of your body. The lymph nodes should be examined based on the size, mobility, consistency and tenderness. Mediastinal Lymph Nodes Normal Size False Positive Strep symptoms include sudden severe sore throat The back of the throat may appear red or swollen or have a white or yellow coating adenoids uvula (soft But relief for that scratchy throat 4 Natural Soothers for Sore Scratchy in the night or it i get the butterfly/tickle in my chest and then a cough is forced Coughing in shower. VPI was significantly associated with more extensive HMLN involvement. The mediastinal lymph nodes are located in the region of the thoracic cavity between the lungs known as the mediastinum. The lymph nodes as they contain the B and T lymphocytes. The most common EUS feature of these benign lymph nodes is a triangular or crescent shape, with possibly an echogenic center (Fig. In this postmortem autopsy study, we aim to define the number, size and weight of the lymph nodes in each mediastinal lymph node station. Below #2 and above the upper margin of the upper lobe bronchus and on the left, medial to the ligamentum arteriosum. Generally, a normal size lymph node is less than one centimeter in diameter; however, there are exceptions in lymph nodes in different areas of the body. Mediastinal Lymph nodes.



Introduction: Enlarged periportal lymph nodes are frequently visualized during imaging of the upper abdomen. This area, called the mediastinum, is surrounded by the breastbone in front, the spine in back, and the lungs on each side. Evaluation of Mediastinal Lymph Nodes in Sarcoidosis, Sarcoid Reaction, and Malignant Lymph Nodes Using CT and FDG-PET/CT Hyun Jung Koo , MD, PhD, Mi Young Kim , MD, PhD, So Youn Shin , MD, PhD, Sooyoung Shin , MD, Sung-Soo Kim , PhD, Sei Won Lee , MD, PhD, and Chang-Min Choi , MD, PhD. Tarrytown, NY. I had a CT Chest and here is the result: Few Small subcentimeter sized prevadcular, precarinal and sub carinal lymph - Answered by a verified Oncologist We use cookies to give you the best possible experience on our website. adrenal glands. They function in the redistribution of fluid, as well as play an important role in the immune system of the body. Most series have reported a higher rate of nodal disease in the central compartment and lateral neck than in the mediastinum [7, 19]; however, right upper paraesophageal lymph node metastasis posterior to the right recurrent laryngeal nerve is associated with superior mediastinal lymph node metastasis and is a risk for invasion of the. In Figure 1, you can see an example of calcified lymph nodes in lung tissues: Figure 1: Lymph node calcification, Lungs. Also reflected is the clinician's assessment of the supraclavicular or scalene lymph nodes, including biopsy in some instances. METHODS We compared the MSCT findings of 89 enlarged lymph nodes due to anthracosis with 54 malignant lymph nodes (non-small cell lung cancer 75. The size criteria for an enlarged lymph node is ashort-axisdiametergreaterthan10mmon axial CT images in those with suspected non–small cell lung cancer (1, 2), but this has been inferred for all thoracic diseases. The present findings support the suggestion by Shimizu et al. Home / Lymph Node Locations / Mediastinal Lymph Nodes Mediastinal Lymph Nodes robert 2014-08-20T13:12:37+00:00 The area between the chest and the lungs is known as the mediastinum within it there is the heart, windpipe, esophagus, blood vessels, nerves, and lymph nodes. Mediastinal involvement is common (10% initially; >50% later). Another CT scan was done on 7/6/11 showing the primary nodual changed and is now 1. Lymph node segmentation in volumetric CT data is a challenging task due to. Epitrochlear, popliteal or iliac Lymphadenopathy >0.



Lymph nodes in the neck have been divided into seven levels, generally for the purpose of. Does not differentiate benign from malignant nodes; Lymph node consistency. The involved nodes were located in the hilum in five cases and in the mediastimum in six. The most common localisation of enlarged mediastinal lymph nodes was the regional station 7 following the ATS mapping (infracarinal). These tumors often begin in the nerves and are noncancerous (benign). What are the different types of lymphoma? It is important to understand that there are several different types of lymphoma and there are several ways to classify lymphoma. Another CT scan was done on 7/6/11 showing the primary nodual changed and is now 1. Of the 21 patients with mediastinal metastases proven at surgery, 14 had nodes greater than or equal to 1 cm (sensitivity = 67%). Furthermore, while other groups focus on neck and abdominal lymph nodes, we target the mediastinum, which is a region highly aected by cardiac and. Lymph nodes are common site of metastatic disease Presence of metastases is important for TNM staging Must determine when examining lymph nodes: tumor present or not; tumor primary or metastatic; possible sites of primary; number of metastatic nodes; size of largest metastatic deposit often helpful; presence of extranodal or vascular involvement. The alcohol pain continued, and one in my neck appeared to grow, so I went for a 2nd opinion back here at home. stable mass spring models to automatically nd enlarged neck lymph nodes of size greater than 8 mm. Lymph Node Exam (OSCE) Lymph Node Groups. A mediastinal lymph node mass, located in the center of the chest, that is larger than 10 centimeters (cm) is associated with a poorer prognosis. Lung cancer typically spreads to the lymph nodes in the mediastinum. Lymph nodes (also known as lymph glands), which are found throughout your body, are an important part of your immune system. Metastatic solid tumors are often associated with localized lymphadenopathy, particularly when the. VPI was significantly associated with more extensive HMLN involvement. Lymphadenopathy refers to nodes that are abnormal in either size, consistency or number.



9 mm in region 7, 7. Mediastinoscopy with biopsy is a procedure in which a lighted instrument (mediastinoscope) is inserted in the space in the chest between the lungs (mediastinum). 19 x 19 Cross, CE, Shaver, JA, Wilson, RJ, and Robin, ED. During lymph node swelling, they don't always go back to the same size they were prior to the infection. References: Moore's Clinical Anatomy 4th Edition pp. Adenocarcinoma of the lung is a type of non-small cell lung cancer. However, metastasis to the mediastinal region directly from the primary tumor without lateral or central node metastasis was also demonstrated [ 20 ]. The median number of sites with visible nodes was 7 (range 3-9). Lymph node variables included total number of enlarged lymph node stations, pattern of lymph node enlargement (mediastinal/hilar or both, unilateral vs bilateral) and largest lymph node size (mm). Lymph Node Staging Conclusions Lymph node metastasis can occur in any size NSCLC tumor Accurate clinical staging is essential to provide the best treatment for patients with NSCLC Endoscopic staging (EBUS, EUS, SD) methods are proving to be reliable for staging of the mediastinum. 5 cm for hilar nodes. 75% of lung cancers [8]. The lymph nodes comprise of lymphatic tissue and are encapsulated. cat scan has mass and lymph nodes - Lung cancer CT scan shows. Lymph Nodes and Nodal Masses All lymph node masses must have regressed to normal size. 5cm) was the best discriminating limit for distinguishing malignant or granulomatous lymphadenopathy from other causes of lymphadenopathy. The size of the metastatic foci could be measured pathologically in 44 metastatic MLNs.



25 cm2, respectively ( 11 ). In addition, some of the nodes included did not meet the size definition of radiographically negative (largest 2. Axillary lymph node metastasis occurs in 0. Size and clinical significance. Lymph node size decreasing After about my 2nd or 3rd treatment I noticed that the size of the lymph nodes in my neck were decreasing dramatically. What causes lymphadenopathy? Lymphadenopathy is. Hi sorry to bother you. Mediastinal lymph node dissection is an essential component of lung cancer surgery. Chest CT scans on all Asian patients over a 5 year period were reviewed and those with pulmonary disease, malignancy or grossly distorted anatomy were excluded. Procedure with mcc. First: Sometimes these, and other nodes are palpable because of infection. The lymphatic system helps maintain fluid balance in the body by collecting excess fluid and particulate matter from tissues and depositing them in the bloodstream. Likely they are reacting against something - whether the cause is benign or malignant is difficult to say. They include those found in the hilum of the lungs, the juxta-oesophageal nodes, and superior and inferior tracheobronchial nodes. - found in cranial dorsal mediastinum at ventral aspect of trachea - causes dorsal displacement of trachea - drain muscles of abdomen, neck, thorax, scapula, caudal cervical vertebrae, ribs, trachea, esophagus, thyroid, thymus, mediastinum, costal pleura, heart, aorta and other thoracic nodes.



They vary in size from 0. When lymph nodes start to swell, painful and tender lumps manifest. First: Possible reasonsSome benignOthers notTalk to your physician. The objective of this study was to measure mediastinal lymph node size in an Asian population, and to correlate nodal size with previous tuberculosis. rected to automatic lymph node detection [4, 5,7]. And because the breast and armpit are close to each other, the lymph nodes are a common place. There were no complications. My mets were found in 7/06, there were on the sternum, ribs & mediastinum nodes. In this postmortem autopsy study, we aim to define the number, size and weight of the lymph nodes in each mediastinal lymph node station. 001) between lymph nodes residing in the superior mediastinum compared with those in the middle mediastinum contiguous to the carina. characteristics, or size of the lymph nodes. The large size of the Tc-99m MAA particle typically prevents it from entering lymphatic channels in the. 6 cm) in length. 4% of CT patients showed one to three lymph nodes per zone. The mediastinum contains the trachea (windpipe), esophagus (swallowing tube), the heart and its veins and arteries, the thymus, nerves, fat, and lymph nodes. To determine the optimum selection of mediastinal lymph nodes for biopsy in non-small cell lung cancer (NSCLC), lymph nodes with or without metastasis at each mediastinal station were ranked in size in patients with pathological N2 disease. If lymphoma cells collect in the l ymph nodes , the swelling does not go down. Features of axillary lymph nodes that may be considered abnormal include increased size (greater than 2 cm), homogeneously increased density, loss of normal architecture, and occasionally internal calcifications. This website is a service of the National Cancer Institute's Surveillance, Epidemiology, and End Results program and one of several resources for Cancer Registrars.



In addition, these stations presented the largest mediastinal lymph nodes. This hypothesis was tested by linking node size and presence or absence of malignancy and looking at factors possibly influencing the size of benign nodes. lymph nodes is documented. Mediastinal Lymph nodes. Deep axillary lymph nodes (high axillary, apical) Internal mammary (N3, LN 7) (parasternal lymph nodes) LN# = EOD LN code 1-4 based on size of metastasis 30 SEER Lymph Node Codes www. Abnormal lymph node size criteria. Uptake in right-sided mediastinal lymph nodes is presumed in two disease,. Your doctor will also want to check lymph nodes near the surface of your skin for size, tenderness, warmth and texture. Usually, they are shotty lymph nodes which are small, often hard, lymph nodes that are usually of no clinical concern. To determine the optimum selection of mediastinal lymph nodes for biopsy in non-small cell lung cancer (NSCLC), lymph nodes with or without metastasis at each mediastinal station were ranked in size in patients with pathological N2 disease. In Figure 1, you can see an example of calcified lymph nodes in lung tissues: Figure 1: Lymph node calcification, Lungs. mediastinal and hilar lymph nodes. Level VII to denote lymph node groups in the superior mediastinum is no longer used. Non-small cell lung cancer (NSCLC) is the most prevalent type of lung cancer and the most difficult to predict. Lymph nodes in other parts of the body are called distant lymph nodes. ) There are many lymph nodes throughout the body. Lymph nodes are organs found within the body that are part of the lymphatic and circulatory system.



Once lung cancer is diagnosed, additional imaging tests are used to determine if the cancer has spread into the lymph nodes. The smallest mass visualized was 2 x 2 x 2 cm in size in the anterior mediastinum. Chest CT scans on all Asian patients over a 5 year period were reviewed and those with pulmonary disease, malignancy or grossly distorted anatomy were excluded. 10 Simple Home Remedies To Treat Swollen Lymph Nodes. The most common mediastinal masses are neurogenic tumors (20% of mediastinal tumors), usually found in the posterior mediastinum, followed by thymoma (15–20%) located in the anterior mediastinum. Palpation of the lymph nodes is ideally done commencing from the most superior lymph node and then working down to the clavicle region. Another CT scan was done on 7/6/11 showing the primary nodual changed and is now 1. los alamos scientific laboratory of the university of california los alamos new mexico. According to the Pulmonologist, in June 2008, my CT scan should absolutely nothing - my lungs were clear!. Mediastinal lymph nodes are divided into nine stations. The basal artery commonly tapers before it divides into the basal segmental arteries and a convenient and relatively reproducible means of measuring its diameter is at its mid-point. The mean long-axis diameter was 9. Lymph node variables included total number of enlarged lymph node stations, pattern of lymph node enlargement (mediastinal/hilar or both, unilateral vs bilateral) and largest lymph node size (mm). The primary nodual was 1. They are scattered over the whole body in cluster type formations. When using radiography to image the mediastinum, the following criteria must be taken into account: width, contours, location, and size and passage of the trachea. Level VII to denote lymph node groups in the superior mediastinum is no longer used. Mediastinal Lymph Nodes Size.