[Show abstract][Hide abstract] ABSTRACT: Tumours involving the anterior skull base are a challenge in diagnosis and treatment. They may arise from the bony skull base itself, intracranially or from the sinonasal tract and orbit. It is often difficult to determine the site of origin of giant tumours as anatomical boundaries are frequently breached. Accurate imaging evaluation is useful in planning treatment and may help in the differential diagnosis. We review those CT and MRI features of giant anterior cranial fossa tumours which may be helpful in identifying a pre-operative diagnosis.
Preview · Article · Aug 2001 · British Journal of Radiology
[Show abstract][Hide abstract] ABSTRACT: In summary, CT was useful in detecting primary periureteric and peripelvic lymphoma in one case and in demonstrating an unusual bilateral, symmetrical periureteric and peripelvic distribution of lymphoma in a further case. It also allowed image guided biopsy and was useful in monitoring the response to treatment. This pattern of CT involvement, either unilaterally or bilaterally, without ureteric obstruction and with or without other imaging abnormalities, is suggestive of lymphoma.
No preview · Article · Jun 2001 · Clinical Radiology
[Show abstract][Hide abstract] ABSTRACT: In patients with known Wegener's granulomatosis (WG) and persistent chest radiographic abnormalities, assessment for disease activity is often difficult, prompting the need for histological diagnosis to determine appropriate treatment. Here we report the use of automated image-guided core needle biopsy of pulmonary lesions for the assessment of disease activity in WG, rather than for primary diagnosis.
Image-guided percutaneous core needle biopsy was performed on five occasions in four patients with thoracic WG and persistent radiographic abnormalities of the chest. Clinical features, indication for biopsy, radiographic abnormalities and pathological findings were recorded.
Adequate pathological specimens were obtained, allowing exclusion of infection and tumour. Active chronic inflammation with or without vasculitis was demonstrated in each case, indicating the need for further immunosuppressive therapy. A small pneumothorax following biopsy in one case required no treatment. Follow-up chest imaging revealed a reduction in the extent of thoracic disease following therapy in all cases.
The safety and diagnostic accuracy of image-guided core biopsy of thoracic lesions makes it a useful tool in the assessment of disease activity in WG patients with persistent chest radiographic lesions.
[Show abstract][Hide abstract] ABSTRACT: Maxillary sinusitis due to dental causes is usually secondary to periodontal disease or periapical infection and is commonly associated with mucosal thickening of the floor of the maxillary antrum. Computed tomography (CT) is currently the modality of choice for evaluating the extent of disease and any predisposing factors in patients with symptoms of chronic maxillary sinusitis, but it is unable to diagnose dental disease reliably. The presence of restorative dentistry is, however, easily seen at CT and is associated with both periapical and periodontal disease. We aimed to determine whether its presence at CT may predispose to maxillary sinusitis, and in particular to focal mucosal thickening of the sinus floor characteristic of dental origin. Three hundred and thirty maxillary sinus CT images in 165 patients were reviewed for the presence of restorative dentistry in the adjacent teeth, focal maxillary sinus floor mucosal thickening, any maxillary sinus disease (including complete opacification, air fluid levels, diffuse mucosal thickening, focal mucosal thickening) and evidence of a rhinogenic aetiology (osteomeatal complex pathology, mucosal thickening in other sinuses). One hundred and ninety two sinuses adjacent to restorative dentistry and 178 sinuses not adjacent to restorative dentistry were analysed. Focal floor thickening both with, and without, evidence of a rhinogenic aetiology, was significantly more common adjacent to restorative dentistry. Maxillary sinus disease overall was no more common adjacent to restorative dentistry. This work demonstrated that the presence of restorative dentistry predisposes to focal mucosal thickening in the floor of the maxillary sinus and its presence should prompt clinical and radiographical assessment to exclude dental disease as a source of chronic maxillary sinusitis.
No preview · Article · Aug 2000 · The Journal of Laryngology & Otology
[Show abstract][Hide abstract] ABSTRACT: Diagnostic imaging is superior to clinical staging in the detection of malignant cervical lymphadenopathy, and thus helps influence therapy and prognosis. The imaging modalities of CT, MRI, US and PET each have their own diagnostic criteria, accuracy and limitations. Newer innovations such as functional imaging, novel MRI contrast agents and FNAC are being appraised with the aim of identifying the micrometastases which are currently radiologically occult.
Preview · Article · Jun 2000 · Dentomaxillofacial Radiology
[Show abstract][Hide abstract] ABSTRACT: Three patients with Wegener's granulomatosis (WG) established by clinical, serological and histological criteria were noted to have marked asymmetrical hemithorax volume loss on thoracic CT. Lung dimensions were analysed from the CT in each case. Evidence of airways disease, parenchymal abnormalities and pleural changes was evaluated on CT, in order to establish the aetiology of the volume loss. Previous pulmonary infection and thoracic intervention were excluded by the clinical data. The three patients had chronic treated thoracic WG for 1-9 years. There was severe asymmetrical pleural disease in one case and parenchymal disease with evidence of fibrotic healing but no evidence of bronchial disease in two cases. Marked asymmetrical volume loss of a hemithorax is a previously unreported finding and should be added to the features of primary chronic thoracic WG. This finding does not require investigation for additional pathology.
Preview · Article · Apr 2000 · British Journal of Radiology
[Show abstract][Hide abstract] ABSTRACT: We reviewed the diagnostic accuracy and complication rates of transthoracic needle biopsy (TNB) with an automated 18-gauge core biopsy needle and gun, using either fluoroscopic or CT guidance. One hundred six lesions were biopsied in 103 patients between 1992 and 1998. Hard-copy images, imaging reports, pathology reports and clinical notes were reviewed. In 3 patients it was not possible to establish the lesion as either malignant or benign from the available follow-up, so these were removed from the analysis of diagnostic accuracy. Adequate samples for histological diagnosis were obtained in 104 of 106 (98%) biopsies. There were 75 of 85 (88%) true-positive core biopsies for malignant lesions and a specific cell type was identified in 70 of 85 (82%) cases. A specific histological diagnosis was obtained in 12 of 18 (66%) biopsies. There was a 19% rate of pneumothorax with only 2.4% requiring drainage. Minor haemoptysis occurred in 3.8% of procedures. The TNB technique with an automated core biopsy needle provides a high level of diagnostic accuracy, effectively distinguishes cell type in malignancy and provides a definite diagnosis in benign disease more frequently than fine needle aspiration (FNA). There is no increased complication rate compared with FNA.
No preview · Article · Feb 2000 · European Radiology
[Show abstract][Hide abstract] ABSTRACT: We present the clinical and magnetic resonance imaging findings of a patient who, following treatment for pancreatic non-Hodgkin's lymphoma (NHL), relapsed with apparently isolated involvement of the right masticator space and left psoas muscles. Non-Hodgkin's lymphoma arising from the masticator space muscles is very rare. In addition, simultaneous lymphomatous involvement of multiple discrete skeletal muscle sites, in the absence of disease elsewhere, has previously only been reported in the limb or limb girdle muscles. Lymphoma should be considered as a cause of isolated enlarged skeletal muscles, even when involving such distant sites.
No preview · Article · Feb 2000 · European Radiology
[Show abstract][Hide abstract] ABSTRACT: Testicular germ cell tumour metastases may undergo "retroconversion" to mature differentiated teratoma following chemotherapy or irradiation. We report a patient with testicular germ cell liver metastases in whom computed tomography (CT) scans following chemotherapy demonstrated a reduction in CT attenuation of the liver lesions to that of cystic and fatty density. This is believed to represent CT evidence of liver metastasis "retroconversion", which offers the potential for non-invasive monitoring of histological progression.
Preview · Article · Dec 1999 · British Journal of Radiology