Computed tomography-guided percutaneous radiofrequency and laser ablation for the treatment of osteoid osteoma – long-term follow-up from 5 to 10 years

AbstractObjective:The canal wall up bony obliteration technique lowers the incidence of recurrent cholesteatoma, but carries the potential risk of obliterating residual cholesteatoma. The objective of this study was to report long-term follow-up radiological findings after performing a canal wall up bony obliteration technique procedure, in order to detect residual and/or recurrent cholesteatoma.Patients:Fifty-one patients presenting with a cholesteatoma or a troublesome cavity were operated upon using the canal wall up bony obliteration technique, and were evaluated by follow-up imaging a mean of 76.4 months post-operatively (range, 53.8–113.6 months).Intervention:All patients were evaluated with high resolution computed tomography and magnetic resonance imaging (including delayed contrast, T1-weighted imaging and non-echo-planar, diffusion-weighted imaging).Results:Imaging revealed the presence of one residual, one recurrent and one congenital petrosal apex cholesteatoma. On high resolution computed tomography, completely obliterated mastoid filled with bone was observed in 74.5 per cent (38/51) of patients, and an aerated middle-ear cavity in 64.7 per cent (33/51). High resolution computed tomography clearly detected any associated soft tissue present in the middle-ear cavity (18/51) and in the obliterated mastoids (13/51), but could not characterise this tissue. Non-echo-planar, diffusion-weighted magnetic resonance imaging clearly identified all three cholesteatomas, and differentiated them from other associated soft tissues. No cholesteatoma was found within the obliterated mastoids.Conclusion:Long-term follow up indicated that the canal wall up bony obliteration technique is a safe method with which to treat primary and recurrent cholesteatoma and to reconstruct unstable cavities. Soft tissue was found quite often in the middle ear and obliterated mastoids. High resolution computed tomography identified its presence but could not further characterise it. However, non-echo-planar, diffusion-weighted magnetic resonance imaging succeeded in differentiating soft tissues, enabling detection of residual or recurrent cholesteatoma after a canal wall up bony obliteration technique procedure.

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Long-term follow-up after left atrial appendage occlusion with comparison of transesophageal echocardiography versus computed tomography to guide medical therapy and data about postclosure cardioversion

Journal of Cardiovascular Electrophysiology ◽

10.1111/jce.13289 ◽

2017 ◽

Vol 28 (10) ◽

pp. 1140-1150 ◽

Cited By ~ 8

Author(s):

Benjamin Berte ◽

Christine Attenhofer Jost ◽

Dominik Maurer ◽

Anja Fäh-Gunz ◽

Xavier Pillois ◽

...

Keyword(s):

Computed Tomography ◽

Transesophageal Echocardiography ◽

Medical Therapy ◽

Left Atrial ◽

Left Atrial Appendage ◽

Atrial Appendage ◽

Left Atrial Appendage Occlusion ◽

Long Term Follow Up

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Incidence and characteristics of left atrial appendage stumps after device-enabled epicardial closure

Interactive CardioVascular and Thoracic Surgery ◽

10.1093/icvts/ivz176 ◽

2019 ◽

Vol 29 (5) ◽

pp. 663-669 ◽

Cited By ~ 3

Author(s):

Etem Caliskan ◽

Matthias Eberhard ◽

Volkmar Falk ◽

Hatem Alkadhi ◽

Maximilian Y Emmert

Keyword(s):

Computed Tomography ◽

Left Atrial ◽

Left Atrial Appendage ◽

Atrial Appendage ◽

Success Rates ◽

Imaging Data ◽

Long Term Follow Up ◽

Short And Long Term

Abstract OBJECTIVES High success rates for left atrial appendage (LAA) exclusion with the AtriClip (Atricure, USA) device have been reported in the literature. This study evaluated the presence and characteristics of residual LAA stumps after AtriClip LAA exclusion using postoperative short- and long-term computed tomography angiography (CTA). METHODS In this retrospective analysis, 43 of 291 consecutive patients undergoing cardiac surgery with concomitant LAA occlusion using the AtriClip device were identified with available postoperative short- and long-term follow-up by CTA. LAA patency and the absence or the size of a present residual LAA stump were assessed on 2-dimensional multiplanar reconstructions, on maximum intensity projection images and on volume-rendered 3-dimensional computed tomography reconstructions. Based on current recommendations, the threshold for a significant LAA stump length was defined <10 mm. RESULTS The LAA was successfully occluded in all 43 patients (100%) as confirmed by intraoperative transoesophageal echocardiography and CTA imaging with a mean follow-up duration of 7.1 ± 0.8 years post-implant. The absence of blood flow in the excluded LAA was confirmed in all cases. In 31 of 43 patients (72%), no residual stump (0 mm) was observed creating a smooth endocardial surface, CTA revealed residual LAA stumps in 11/43 patients (26%) with a length <10 mm and a significant residual stump with a depth of >10 mm (12 mm) in 1 patient (2%). The mean length, width and depth of the residual stumps were 5.8 ± 2.1, 4.4 ± 1.2 and 7.3 ± 2.3 mm, respectively. CONCLUSIONS This study investigated the incidence of residual stump formation (>10 mm) after LAA closure with the AtriClip device based on CTA imaging data obtained during short- and long-term follow-up. While no LAA stump was detectable in the majority of patients, a non-significant LAA stump (<10 mm) was present in 26% of cases, indicating a favourable LAA occlusion profile for the AtriClip device. However, although a LAA stump length <10 mm is currently considered clinically safe, this definition needs further attention in future studies with regards to its potential clinical implications.

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Pulmonary pure ground-glass opacity lesions: Use of computed tomography attenuation for predicting tumor progression.

Journal of Clinical Oncology ◽

10.1200/jco.2013.31.15_suppl.7548 ◽

2013 ◽

Vol 31 (15_suppl) ◽

pp. 7548-7548

Author(s):

Takashi Eguchi ◽

Ryoichi Kondo ◽

Satoshi Kawakami ◽

Mina Matsushita ◽

Tetsu Takeda ◽

...

Keyword(s):

Computed Tomography ◽

Ground Glass Opacity ◽

Attenuation Value ◽

Kaplan Meier ◽

Ct Attenuation ◽

Long Term Follow Up ◽

The Difference ◽

Ct Attenuation Value

7548 Background: Cases with pure ground-glass opacity (GGO) are increasing with the use of computed tomography (CT). In some cases, pure GGO on follow-up CT may represent tumor enlargement or the presence of solid components. We evaluated the natural progression of pure GGO lesions during a long-term follow-up period of more than 2 years. Methods: We retrospectively investigated 95 patients with pure GGO lesions detected between February 2003 and December 2010, in whom these lesions were monitored using CT for more than 2 years. Results: The median follow-up period was 64.7 months (range, 24–114 months). During the follow-up period, areas showing GGO increased in size or appeared to have solid components in 49 patients (group 1) and showed no change in 46 patients (group 2). We compared patient characteristics and tumor properties between the 2 groups. Mean CT attenuation values of the tumors differed significantly between groups 1 (-639.9 ± 88.9 HU) and 2 (-709.2 ± 60.9 HU). In contrast, no significant differences were noted with regard to age, gender, smoking history, lung cancer history, tumor size, and total numbers of GGO lesions between the 2 groups. The difference in the time to tumor growth according to the initial mean CT attenuation value was estimated using the Kaplan–Meier method. The growth incidence at 114 months for lesions with a mean CT attenuation value of -650 HU or more (n = 35) and less than -650 HU (n = 60) were estimated to be 96% and 48%, respectively. The difference between the 2 Kaplan–Meier curves was statistically significant (p < 0.0001). The usefulness of the mean CT attenuation value in predicting the growth of GGO lesions was evaluated using receiver operating characteristic analysis. The sensitivity and specificity was 63% and 87%, respectively, for a mean CT attenuation cutoff value of -650 HU. The area under the curve was 0.76. Conclusions: Many pure GGO lesions have potential for growth as seen during long-term follow-up. CT attenuation is useful in predicting the growth of GGO lesions.

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