Usefulness of cone-beam computed tomography-reformatted epidurography in percutaneous epidural adhesiolysis: A pilot study.

BACKGROUND: Conventional epidurography (CE) is thought to have insufficient usefulness on percutaneous epidural adhesiolysis (PEA). We aimed to evaluate the association between the outcome of PEA and cone-beam computed tomography-reformatted epidurography (CBCT-RE). METHODS: After ethics board approval and written informed consent were obtained, we performed 30 PEA in 26 participants, and evaluated their post-PEA image findings. Two independent radiologists categorized and recorded the occurrence of contrast in the intracanal ventral and extraforaminal regions on CE, and in the dorsal canal (DC), ventral canal (VC), dorsal foramen (DF), and ventral foramen (VF) on CBCT-RE. Reproducibility was assessed using intraclass correlation coefficients (ICCs). Baseline characteristics along with contrast distribution patterns of CE and CBCT-RE were analyzed in terms of their association with symptom relief at 1 month after PEA. RESULTS: The rate of patients with symptoms relief >50% after PEA was 63.3%. The inter-reader agreement was higher for CBCT-RE (ICC = 0.955) than for CE (ICC = 0.793). Participants with contrast coexisting in VC and DF adjacent to the irritated nerve root on CBCT-RE ( p = 0.015) had a significantly better response after PEA than those without contrast at these locations on CBCT-RE, independent of baseline characteristics (adjusted odds ratio: 11.414 [ p = 0.012]). CONCLUSION: CBCT-RE with identifying contrast distribution patterns is useful for predicting outcome of PEA.

Three-dimensional image simulation of primary diaphragmatic hemangioma: A case report.

BACKGROUND: Fewer than 200 cases of diaphragmatic tumors have been reported in the past century. Diaphragmatic hemangiomas are extremely rare. Only nine cases have been reported in English literature to date. We report a case of cavernous hemangioma arising from the diaphragm. Pre-operative three-dimensional (3D) simulation and minimal invasive thoracoscopic excision were performed successfully, and we describe the radiologic findings and the surgical procedure in the following article. CASE SUMMARY: A 40-year-old man was referred for further examination of a mass over the right basal lung without specific symptoms. Contrast-enhanced computed tomography revealed a poorly-enhanced lesion in the right basal lung, abutting to the diaphragm, measuring 3.1 cm × 1.5 cm in size. The mediastinum showed a clear appearance without evidence of abnormal mass or lymphadenopathy. A preoperative 3D image was reconstructed, which revealed a diaphragmatic lesion. Video-assisted thoracic surgery was performed, and a red papillary tumor was found, originating from the right diaphragm. The tumor was resected, and the pathological diagnosis was cavernous hemangioma. CONCLUSION: In this rare case of diaphragmatic hemangioma, 3D image simulation was helpful for the preoperative evaluation and surgical decision making.

Factors influencing discomfort during anterior ultrasound-guided injection for hip arthrography.

BACKGROUND: Although ultrasound (US)-guided injection techniques for magnetic resonance arthrography of the hip have been used with increasing frequency to diagnose internal joint derangements, little is known about patient tolerance, which is relevant information for patients. The objective of this study was to evaluate prospectively the association between possible influencing factors and discomfort felt during the performance of anterior US-guided injection techniques targeting the femoral head-neck junction during hip arthrography. METHODS: Forty-four consecutive patients (21 women and 23 men; mean age, 41 years) undergoing magnetic resonance hip arthrography were sequentially assigned to receive injection alternating between fixed and freehand US-guided injection. Discomfort was assessed using a visual analog scale and relative ratings. Patient body mass index, extra-articular contrast leakage, the duration of the procedure, the needle advancement distance, and the fixed trajectory of the needle were assessed. Pearson's correlation coefficients and multiple logistic regression analysis were used to determine the association. RESULTS: Puncture was successfully accomplished in all cases, and no relevant complications were reported. The only significant relationships were between discomfort and the time required for needle manipulation (r = 0.8) and fixed US-guided injection (r = 0.6; p < 0.001). Compared with the freehand technique, the fixed technique resulted in significantly less pain and took significantly less time to perform (p < 0.001). The procedure time during needle manipulation in the fixed US-guided injections (4.0 ± 0.9 seconds) was significantly less than that in the freehand US-guided injections (19.4 ± 17.6 seconds; p < 0.001). No significant relationships were found between discomfort and other parameters (r < 0.3, p > 0.05). CONCLUSION: The procedure time appears to be the most important factor influencing patient discomfort. Fixed US-guided injection is a time-saving technique that alleviates procedure-related discomfort.

Docetaxel (Taxotere®)-induced cavitary change of pulmonary metastatic lesions complicated by bilateral spontaneous pneumothoraces in a patient with primary adenocarcinoma of the lung.

Pneumothorax is a complication that rarely occurs after chemotherapy for lung cancer. We report the chest computed tomography findings of a case of spontaneous pneumothorax complicating docetaxel (Taxotere®) treatment for pulmonary metastasis in a 70-year-old woman with pulmonary adenocarcinoma. The patient developed bilateral pneumothoraces, which was induced by changes in the cavitary pulmonary metastatic lesions, after systemic chemotherapy with docetaxel. The chest computed tomography findings and possible mechanisms of this unusual complication are discussed in this report.

Extra-adrenal paraganglioma of the prostate.

Extra-adrenal pheochromocytomas, or paragangliomas, are rare tumours that may develop from extra-adrenal chromaffin cells, and most occur in the organ of Zuckerkandl. Extra-adrenal paraganglioma of the prostate is extremely rare. We report a 53-year-old man with hypertension and lower urinary tract symptoms, who was initially diagnosed with benign prostate hyperplasia. Computed tomography (CT) showed a large heterogenously enhancing mass in the prostate, imprinting the right distal ureter and urinary bladder. Before surgical intervention, CT-guided biopsy of the prostatic mass was performed and the result of histologic examination confirmed extra-adrenal paraganglioma. He underwent radical prostatectomy, partial cystectomy and right ureteroneocystostomy. The patient recovered and his blood pressure returned within normal range after surgical removal of the prostate tumour. In this article, we stress that the rarity of prostatic paraganglioma, preoperative localization and imaging-guided biopsy were useful in determining the surgical strategy.

Missed brown tumors in a young adult with decreased bone density.

Brown tumors, a benign osteolytic process, are most commonly caused by hyperparathyroidism. Multiple bone involvement is relatively rare. There are many similarities in the radiologic and histological features of brown tumors and giant cell tumors (GCTs) of bone. Differentiation between the two lesions is dependent upon evaluation of serum biochemistry including serum calcium, phosphorous, and intact parathyroid hormone (I-PTH) levels. Herein, the case of a 32-year-old man with multiple osteolytic lesions of the left tibia and fibula as well as the fourth metacarpal bone of the left hand, previously misdiagnosed with multiple GCTs, is presented. Based on the radiographic findings and biochemistry results in a young adult patient, brown tumor was suspected and subsequently definitively diagnosed.