Diagnostic Value of Ultrasound-Guided Percutaneous Biopsy in the Evaluation of Cervical Lymph Node Lesions

Although based the value of clinical ultrasound biopsy lymph node lymphadenopathy simply refers to the disease or enlargement of the lymph nodes of the neck, and it’s considered more of a physical sign or symptom rather than a diagnosis. There can be various reasons including degenerative, inflammatory or neoplastic. However healthy lymph nodes can be palpable in the axilla, neck and groin region. Numerous Infectious causes of cervical lymphadenopathy including most importantly HIV, Tuberculosis and Chicken pox exist. For malignant diseases, this lymphadenopathy can be either reactive or metastatic[4]. In case of malignancy being suspected, routine throat examination including mirror and endoscopy is performed. ABSTRACT Objective: To investigate the diagnostic value of ultrasound-guided percutaneous biopsy in the diagnosis of cervical lymph node lesions. Methods: From January 2017 to August 2019, ultrasound-guided percutaneous biopsy, using clinical 16G and 18G biopsy needles, were used in 190 patients with cervical lymph node lesions. After taking out the target tissue and having a pathologically confirmed diagnosis, it was possible to determine whether the material was satisfactory or not. All patients underwent ultrasound-guided biopsy for pathological diagnosis and postoperative pathology confirmed the final diagnosis. Results: The study found that 185 patients had satisfactory materials, reaching 97.37% of the satisfaction rate. For cervical lymph node lesions, Ultrasound-guided 16G needle biopsy achieved 100% sensitivity, 96% specificity, and 98% accuracy, whereas Ultrasound-guided 18G needle biopsy achieved 100% sensitivity, 94% specificity, and 97% accuracy respectively. There was no significant difference noted between the two needle biopsies in the diagnosis of benign and malignant lesions (P>0.05); with 84% sensitivity, 93% specificity, and 87% accuracy being significantly different (P < 0.05). Conclusion: Ultrasound-guided percutaneous biopsy is able to ensure a high accuracy of diagnosis and thereby reduce the occurrence of complications in patients with cervical lymph node lesions.


Introduction
In recent clinical practice, patients presenting with chief complaint of cervical lymphadenopathy [1] has been progressively increasing year after year and as a result, the main causes have been becoming more complicated. Therefore, clinical diagnosis of the benign and malignant lymph node lesions needs to be precise, as the development of clinical treatment programs are crucial [2].
Although clinically diagnosed cervical lymph node lesions, based on pathological diagnosis of excision biopsy, can achieve high diagnostic accuracy, yet traumatic, sampling difficulties and other issues are encountered. This article explores the diagnostic value of clinical ultrasound guided percutaneous biopsy for cervical lymph node lesions [3].Cervical lymphadenopathy simply refers to the disease or enlargement of the lymph nodes of the neck, and it's considered more of a physical sign or symptom rather than a diagnosis. There can be various reasons including degenerative, inflammatory or neoplastic. However healthy lymph nodes can be palpable in the axilla, neck and groin region. Numerous Infectious causes of cervical lymphadenopathy including most importantly HIV, Tuberculosis and Chicken pox exist. For malignant diseases, this lymphadenopathy can be either reactive or metastatic [4].
In case of malignancy being suspected, routine throat examination including mirror and endoscopy is performed. B-mode Ultrasound imaging of the cervical lymph node would depict morphology while the power Doppler would assess the vasculature [2].Cervical lymphadenopathy in suspected case of malignancies is diagnosed mostly using Fine needle aspiration cytology under ultrasound guidance [5]. It is quite effective procedure as while performing the percutaneous needle biopsy the doctor is not blind folded and because of the real time ultrasound imaging there is less chance of damaging any structures while performing the biopsy.
Lymphadenopathy when first suspected has to undergo tests for a definitive diagnosis. Ultrasound imaging of the lymph node would tell us whether there is enlargement or any other dimensional changes. But to deduce whether the enlargement or mass is benign or malignant, we need to perform a biopsy and test histologically and pathologically [6]. So, for that, if we can decide on the best diagnostic test to be the ultrasound guided percutaneous biopsy, then it would be advantageous [7].

Method
The probe frequency using ultrasonic diagnostic apparatus is set to 8~14MHz and the semiautomatic biopsy needle included 90 cases of 16G biopsy needle and 100 cases of 18G biopsy needle. In the early stages of clinical puncture, routine blood work and blood coagulation examination was performed on the patient. The specific location, number, shape, blood flow characteristics and internal echo of the patient's neck mass were observed and recorded carefully. It was observed whether the probe caused any sub-optimal feeling of pain at the location of the lesion. The patient obtained a supine position and the puncture diagnosis was performed. Color Doppler was used: to analyze the tissue of the lesion area and its peripheral blood flow; to select the best puncture point and method; and to use the 2% concentration lidocaine hydrochloride after laying the conventional disinfection pad. After anesthesia, ultrasound guided the needle to the edges of the enlarged lymph node, pressed the plug to expose the inner needle, pressed the outer needle automatically under the embolization, and extracted out the tissue to take the groove. In each case, 2~3 needles were used to take out the specimen and then put into sterile filter paper. This was followed by placing it into a 10% formaldehyde liquid bottle to complete the histopathological examination.
Statistical methods: The data in this paper were processed by SPSS 20.0 software. The measurement data and the calculative data were respectively used and t, the calculative data passed the % test, and the measurement data was analyzed by x2. The data difference was statistically different (p<0.05).

Results
The There was no significant difference noticed between the two needle biopsies in the diagnosis of benign and malignant lesions (P>0.05); 84% sensitivity, 93% specificity, and 87% accuracy were significantly different (P < 0.05), compared with the comparative diagnosis (Table 3).

Discussion
Ultrasound-guided biopsy being easily available and easy to operate has a wide range of applications [5]. It is also considered highly safe. However, due to the significant differences in specific locations of the lesions, the diagnostic value is not uniform [9].
Clinically relevant researchers conducted a study on the diagnostic value of 350 cases of cervical lymph node lesions and found that the satisfaction rate of the material reached 89%. The author believes the satisfaction rate of the material to be closely related to the puncture technique of the clinical operator, as well as the selection of the puncture site and the type of lesion of the patient.
The results of this study were satisfactory in 185 patients, reaching 97.37% of the material satisfaction rate, and all patients had no complications. Ultrasound was able toclearly display the patient's skin and medullary lymph node tissue was completely extracted.
For patients with unclear imaging, Color Doppler flow was required to extract a complete material [10]. In patients with lymphadenitis, it was necessary to remove the pus using a 16G biopsy needle before approaching it, and to select the puncture point as far as possible from the tumor mass. If necessary, surgical resection was required.
This study found that ultrasound-guided 18G biopsy achieved 100% sensitivity, 94% specificity and 97% accuracy for cervical lymph node lesions. There was no significant difference between the two needle biopsies in the diagnosis of benign and malignant lesions (P>0.05). Ultrasound diagnosis reached 84% sensitivity, 93% specificity and 87% accuracy, and there was a significant difference (P<0.05). Therefore, the needle biopsy is inferred to have a high safety and diagnostic accuracy, as well as a high clinical value.

Conclusion
Ultrasound-guided percutaneous biopsy can ensure a high accuracy of diagnosis and thereby can reduce the occurrence of complications in patients with cervical lymph node lesions.