Biomedical subjects

R J Rongen

Publications and source records attributed to R J Rongen.

12 recordsLinked to original sources

PubMed1998

Ultrasound in the diagnosis of cervical tuberculous adenitis.

Ultrasound (US) of cervical tuberculous adenitis (CTA) was demonstrated to produce a characteristic pattern of the affected nodes in the majority of the patients in this study. The contribution of US to the diagnosis and assessment of CTA is evaluated. It is concluded that, since the other diagnostic tests for CTA are not reliable and/or time-consuming, the demonstration of nodal calcifications, conglomerate nodal masses and spread into the subcutaneous tissues at US in patients with elusive cervical masses may result in earlier recognition of CTA.

Adult↗

PubMed1997

Maintaining efficiency in a satellite radiology department.

In this paper the organisation of a radiology satellite department is described. In the satellite department only bucky examinations are performed, thus avoiding the need for the duplication of sophisticated material and specialized staff. The satellite department maintains as efficient a service as the main radiology department. For this purpose a digital radiology system was chosen for the satellite department. This system permits digital data to be sent to the main location. This results in a maximisation of the advantages of a two-location system as well as avoiding the need for patients' files to be moved between different locations.

Efficiency, Organizational↗

PubMed1993

Extradural cyst.

Explore the source record for details and available documents.

Cysts↗

PubMed1991

Ultrasound-guided fine-needle aspiration biopsy of neck nodes.

The assessment of nodal involvement in patients with squamous cell carcinoma of the head and neck is still a major diagnostic problem. Although the sensitivity of imaging techniques for detection of neck nodes is gradually improving, the specificity for metastases remains low. Cytologic examination could, theoretically, supply additive information. Computed tomographic-and magnetic resonance-guided aspiration techniques have been described, but these were not efficacious and laborious. In 1984, we developed a technique for ultrasound-guided (UG) fine-needle aspiration biopsy (FNAB). This technique is described herein, and the value of UGFNAB is compared with conventional FNAB. All statistical characteristics of UGFNAB appeared to be superior to conventional FNAB (sensitivity, 98% vs 88%; specificity, 95% vs 82%; positive predictive value, 98% vs 93%; negative predictive value, 95% vs 74%; and accuracy, 97% vs 87%). Furthermore, UGFNAB was characterized by less nondiagnostic aspirations. It is concluded that UGFNAB is a reliable technique for differentiation between benign nodes and cervical lymph node metastases and it may, therefore, contribute to a more accurate assessment of the neck in squamous cell carcinoma of the head and neck.

Biopsy, Needle↗

PubMed1990

Ultrasound-guided percutaneous drainage of deep neck abscesses.

Deep neck abscesses may still result in significant morbidity and mortality. Surgical therapy carries the risk of damage to cranial nerves and arteries. Excellent results of ultrasound-guided percutaneous catheter drainage of abdominal abscesses led us to apply this technique to the management of deep neck abscesses. Five patients were treated with ultrasound-guided catheter drainage and antibiotics. All patients were cured without complications or recurrences. We consider this cheap and highly effective treatment as a valuable alternative to conventional therapy.

Abscess↗

PubMed1989

Metastatic neck disease. Palpation vs ultrasound examination.

Nodal disease is a diagnostic problem in head and neck oncology. Current methods for investigation of the neck are not satisfactory as far as differentiation between necks with positive nodes and those with negative nodes is concerned. In the present study, the results of palpation and ultrasound examination were compared with histopathologic examination results of 120 neck dissection specimens. Furthermore, the value of ultrasound examination, combined with cytologic examination, of neck nodes was evaluated. Ultrasound examination was characterized by high sensitivity, ie, 96.8%; specificity was 32.0%. When the results of ultrasound-guided fine-needle aspiration biopsy were added to the ultrasound findings, specificity was as high as 92.9%. From these results, it was concluded that ultrasound examination with fine-needle aspiration biopsy is an accurate method for assessment of the neck in head and neck oncology.

Biopsy, Needle↗

PubMed1988

Screening for lymph nodes in the neck with ultrasound.

In a study of the value of ultrasound in staging patients with head and neck malignancies, we performed ultrasound of the neck. The results of this investigation were compared with palpation. A fine needle aspiration biopsy and/or histologic examination was carried out on lymph nodes which were found. One hundred and six patients were included in this study. In 44 of the patients no lymph nodes could be detected, either on palpation or by ultrasound examination. In the other 62 patients all palpable lymph nodes were also demonstrated by ultrasound. However, in 20 patients with negative palpatory findings, ultrasound revealed lymph nodes: 11 metastases and 9 benign nodes. In 40 patients an ultrasound guided fine needle aspiration biopsy (UGFNAB) was performed. In 85% of these patients a cytological diagnosis could be made. From these results we conclude that ultrasound and UGFNAB are of considerable value in staging head and neck malignancies.

Biopsy, Needle↗

PubMedDate not supplied

Ultrasound of the head and neck.

In this paper, the basic physics of ultrasound are briefly discussed. In addition, the ultrasound anatomy of the head and neck is described. Furthermore, the technique of ultrasound-guided, fine-needle aspiration biopsy is outlined.

Biopsy, Needle↗

PubMedDate not supplied

Ultrasound in the diagnosis of laryngoceles.

Clinical and anatomical features of laryngoceles are reviewed. Furthermore, the ultrasound characteristics of 8 patients with laryngoceles are outlined. Internal laryngoceles appeared to be echo-free, well-defined structures inside the thyroid cartilage. Combined laryngoceles had an additional cystic mass outside the laryngeal skeleton, at the thyrohyoid membrane. Characteristically, this cystic mass was connected through the thyrohyoid membrane to the intra-laryngeal mass. Finally, the value of ultrasound examination in the diagnostic work-up of patients with laryngoceles is appreciated and compared to the respective values of ENT examination, conventional tomography and CT.

Diagnosis, Differential↗

PubMedDate not supplied

Evaluation of branchiogenic cysts by ultrasound.

Ultrasound and palpation findings of 17 patients with branchiogenic cysts were studied. Results were compared with operative and histopathologic findings in 13 patients, and to fistulography, cytologic examination and/or CT in 4 patients. Ultrasound findings (appearance, location and extension) were characteristic in 15 of 17 cases. Palpation proved to be incorrect or inconclusive in more than half of the patients. It is concluded that ultrasound examination of the neck may contribute to the correct presurgery diagnosis of branchiogenic cysts.

Biopsy, Needle↗

PubMedDate not supplied

Ultrasound characteristics of thyroglossal duct anomalies.

The purpose of this study was to determine the value of ultrasound examination in the diagnosis of thyroglossal duct anomalies. The ultrasound and palpation findings in 24 patients with a thyroglossal duct anomaly were reviewed. Cysts, tracts and ectopic thyroid tissue appeared to produce a characteristic ultrasound pattern in most cases. This study includes 5 patients with non-symptomatic lesions which were detected at ultrasound examination. The necessity of performing a radionuclide scan prior to surgery for a thyroglossal duct anomaly is reconsidered in view of the diagnostic power of ultrasound in thyroid disease.

Biopsy, Needle↗

PubMedDate not supplied

Guidelines for the use of ultrasound in the head and neck.

The values and limitations of ultrasound of the head and neck in general, and with respect to the different regions of the neck, are described. In addition, the place of ultrasound examination in the work-up of patients with an elusive neck mass is defined.

Biopsy, Needle↗