Radioguided Occult Lesion Localization Research Articles

Non-Palpable Breast Cancer: A Targeting Challenge–Comparison of Radio-Guided vs. Wire-Guided Localization Techniques

Background: The incidence of non-palpable breast cancer is increasing due to widespread screening and neo-adjuvant therapies. Among the available tumor localization techniques, radio-guided occult lesion localization (ROLL) has largely replaced wire-guided localization (WGL). The aim of this study was to compare the ROLL and WGL techniques in terms of the effectiveness of isotopic marking of axillary sentinel lymph nodes and to assess patient perspectives along with surgeon and radiologist preferences. Methods: A single-center, prospective, randomized study enrolled 110 patients with non-palpable breast lesions (56 ROLL, 54 WGL). Breast type, tumor volume, location, histological and radiological features, and localization/surgical duration were evaluated in the context of sentinel lymph node marking using isotope (technetium-99m-labeled human serum albumin) and blue dye. Statistical analysis was performed with significance set at p < 0.05 and strong significance at p < 0.01. Results: A single-center, prospective, randomized study enrolled 110 patients with non-palpable breast lesions (56 ROLL, 54 WGL). Breast type, tumor volume, location, histological and radiological features, and localization/surgical duration were evaluated in the context of sentinel lymph node marking using isotope (technetium-99m-labeled human serum albumin) and blue dye. Statistical analysis was performed with significance set at p < 0.05 and strong significance at p < 0.01. Conclusions: While ROLL provided advantages in terms of patient comfort and logistical simplicity, WGL was superior for axillary sentinel lymph node marking, particularly in inner quadrant tumors, suggesting that WGL may be preferred in these cases.

Evolution of localization methods for non-palpable breast lesions: a literature review from a translational medicine perspective.

With an increasing number of non-palpable breast lesions detected due to improved screening, accurate localization of these lesions for surgery is crucial. This literature review explores the evolution of localization methods for non-palpable breast lesions, highlighting the translational journey from concept to clinical practice. A comprehensive search of PubMed, Embase, and Scopus databases until September 2023 was conducted. Multiple methods have been developed throughout the past few decades. (I) Wire-guided localization (WGL) introduced in 1966, has become a reliable method for localization. Its simplicity and cost-effectiveness are its key advantages, but challenges include logistical constraints, patient discomfort, and potential wire migration. (II) Intraoperative ultrasound localization (IOUS) has shown promise in ensuring complete lesion removal with higher negative margin rates. However, its utility is limited to lesions visible on ultrasound (US) imaging. (III) Breast biopsy marker localization: the use of markers has improved the precision of localization without the need for wire. However, marker visibility remains a challenge despite improvements in their design. (IV) Radioactive techniques: radio-guided occult lesion localization (ROLL) and radioactive seed localization (RSL) offer flexibility in scheduling and improved patient comfort. However, they require close multidisciplinary collaboration and specific equipment due to radioactive concerns. (V) Other wireless non-radioactive techniques: wireless non-radioactive techniques have been developed in recent three decades to provide flexible and patient-friendly alternatives. It includes magnetic seed localization, radar techniques, and radiofrequency techniques. Their usage has been gaining popularity due to their safety profile and allowance of more flexible scheduling. However, their high cost and need for additional training remain a barrier to a wider adoption. The evolution of breast lesion localization methods has progressed to more patient-friendly techniques, each with its unique advantages and limitations. Future research on patient-reported outcomes, cosmetic outcomes, breast biopsy markers and integration of augmented reality with breast lesion localization are needed.

Radioactive Seed Localization for Nonpalpable Breast Lesions: Systematic Review and Meta-Analysis.

This study is a systematic review with meta-analysis comparing radioactive seed localization (RSL) versus radio-guided occult lesion localization (ROLL) and wire-guided localization (WGL) for patients with impalpable breast cancer undergoing breast-conserving surgery and evaluating efficacy, safety, and logistical outcomes. The protocol is registered in PROSPERO with the number CRD42022299726. A search was conducted in the Embase, Lilacs, Pubmed, Scielo, Web of Science, and clinicaltrials.gov databases, in addition to a manual search in the reference list of relevant articles, for randomized clinical trials and cohort studies. Studies selected were submitted to their own data extraction forms and risk of bias analysis according to the ROB 2 and ROBINS 1 tools. A meta-analysis was performed, considering the random effect model, calculating the relative risk or the mean difference for dichotomous or continuous data, respectively. The quality of the evidence generated was analyzed by outcome according to the GRADE tool. Overall, 46 articles met the inclusion criteria and were included in this systematic review; of these, 4 studies compared RSL and ROLL with a population of 1550 women, and 43 compared RSL and WGL with a population of 19,820 women. The results showed that RSL is a superior method to WGL in terms of surgical efficiency in the impalpable breast lesions' intraoperative localization, and it is at least equivalent to ROLL. Regarding security, RSL obtained results equivalent to the already established technique, the WGL. In addition to presenting promising results, RSL has been proven to be superior to WGL and ROLL technologies.

Combined localization technique with radio-guided occult lesion localization and Magseed for breast-conserving surgery for non-palpable multifocal breast cancer: a case report

Combined localization technique with radio-guided occult lesion localization and Magseed for breast-conserving surgery for non-palpable multifocal breast cancer: a case report

Radio-Guided Occult Lesion Localization With 99m Tc for the Localization of Nonpalpable Melanoma and Soft Tissue Sarcoma Lesions: A Feasibility Study.

Localization techniques are needed to facilitate resection of nonpalpable lesions. In this study, the feasibility of radio-guided occult lesion localization (ROLL) with 99m Tc is investigated for the localization of nonpalpable, small, suspicious, or proven melanoma or soft tissue sarcoma lesions at various locations throughout the body. Patients with nonpalpable, suspicious, or proven melanoma or soft tissue sarcoma lesions were selected for this study. Within 24 hours before surgery, a median dose of 33.92 MBq 99m Tc-labeled human albumin particles ( 99m Tc-NA or 99m Tc-MAA) was injected in the lesion under ultrasound guidance. A hand-held gamma probe was used to detect the radioactive signal and guidance during surgery. In this study, 20 patients with a total of 25 lesions were included and analyzed. The median size of the lesions was 1.8 cm (interquartile range [IQR], 1.8-4.0 cm), of which 44% were intramuscular located and 36% were subcutaneous, and 20% consisted of suspicious lymph nodes, mostly in the lower extremity. At median 4 hours (IQR, 3-6 hours) postinjection, 99m Tc ROLL showed a 100% intraoperative identification rate with proper signal identification with the gamma probe in all patients. With a median surgery time of 76 minutes (IQR, 45-157 minutes), all targeted lesions could be resected without 99m Tc-related complications, resulting in 88% microscopically margin-negative resection. No reoperations were needed for the same lesion. The 99m Tc ROLL procedure is feasible for the localization and excision of small, nonpalpable melanoma and soft tissue sarcoma lesions at various locations in the body.

Radioguided Occult Lesion Localization Technique for Biopsy of Nonpalpable Subcutaneous Lesions in Suspected Metastatic Melanoma.

In patients with a history of melanoma, the risk of recurrence depends on the stage at diagnosis. Patients who present with more advanced disease are more likely to experience recurrence; patients with less advanced disease at presentation have slower progression and lower likelihood of recurrence. The aim of this study was to evaluate the use of a minimally invasive and targeted technique as a diagnostic and therapeutic tool for the excision of nonpalpable lesions suspected to be melanoma metastases. The authors evaluated 21 patients with stage IIB, IIC, or III melanoma and subcutaneous nonpalpable lesions with a high risk of malignancy on positron emission tomography/computed tomography scan during oncologic follow-up. To guide biopsy, the authors used the radioguided occult lesion localization technique, using intralesional injection of technetium-99m albumin macroaggregates the day before surgery. During surgery, a handheld gamma probe was used to locate the lesions. Surgical localization of radiolabeled lesions was achieved in all cases. Relapsed melanoma was histologically confirmed in 13 patients. This technique proved to be a simple, safe, and effective method to detect and biopsy nonpalpable or difficult-to-locate lesions in suspected metastatic melanoma. The main advantage was disease restaging (eg, from stage II to III), allowing patients to access adjuvant therapies not approved as early-stage melanoma treatment. Therapeutic, IV.

Comparison of wire-guided localization (WGL) and radio-guided occult lesion localization (ROLL) in localization of non-palpable breast lesions

BackgroundThe number of patients with non-palpable breast lesions has increased gradually. This is because of the technological development in imaging techniques and the screening programs that lead to early detection of breast lesions.The number of patients with non-palpable breast lesions has increased gradually. This is because of the technological development in imaging techniques and the screening programs that lead to early detection of breast lesions. The aim of marking the non-palpable breast lesions is to achieve accurate lesion localization, to obtain the better cosmetic result with less tissue loss and to provide negative surgical margin.Aim of the studyIn the current study, we aimed to compare the wire-guided localization (WGL) technique with the radio-guided occult lesion localization (ROLL) technique to assess their accuracy and efficacy in non-palpable breast lesions localization.MethodsThis is a retrospective study conducted at Baheya center for Early Detection and Treatment of Breast Cancer from January 2018 and June2022,where 670 patients with non-palpable breast lesions underwent an excision were enrolled randomly in ROLL group (n = 320) and WGL (n = 350).ResultsBoth the localization time and the time of operation were significantly decreased with the ROLL in comparison to WGL(P < 0.001). Complete lesion excision with clear margins were reported in 119/135(88.2%) of ROLL group and in 130/159 (81.8%) of WGL group and the difference was significant (P < 0.001). Reoperations (re-lumpectomy or mastectomy) were done as a second procedure on 16(11.8%) of the ROLL patients compared with 29(18.2%) in the WGL patients(P < 0.001).ConclusionThis study shows that ROLL is as effective as WGL for non-palpable breast lesions excision. Also, ROLL improve the outcomes by decreasing the duration of surgery, localization time, achieving a higher percentage of clear margin in spite of lower specimen size and scar length.

Radioguided Surgery for the Localisation of Specific Adenopathies in the Head and Neck Area.

Intraoperative identification and excision of specific lymphadenopathies is not always easy; it is, therefore, important to have complementary techniques that help us in the identification of these structures intraoperatively. The aim of this study is to present preliminary results of the use of ROLL technique (radioguided occult lesion localisation) as a method of excisional biopsy in the head and neck territory. We present 10 cases of patients with difficult to localise lymphadenopathies in the head and neck territory that underwent the ROLL technique. The radiotracer was only injected in the nodes that we wanted to study; in this way, all of them were correctly identified and extracted without resecting those that had no signs of pathology avoiding removing healthy lymphatic tissue and reducing morbidity. The ROLL technique is a useful technique, since in all of the patients, the previously marked adenopathy was accurately identified and excised; we reduced the intraoperative time and avoided the complications derived from more aggressive cervical exploratory surgeries.

Localisation accuracy with iodine-125 seed versus wire guidance for breast cancer surgery.

Impalpable breast lesions generally require image-guided localisation for breast-conserving surgery. A standard technique is to place a hook wire (HW) within the lesion. Radioguided occult lesion localisation using iodine seeds (ROLLIS) involves inserting a 4.5 mm iodine-125 seed (seed) into the lesion. We hypothesised that a seed could be more precisely positioned in relation to the lesion than a HW and that this may be associated with a lower re-excision rate. Retrospective review of consecutive participant data from three ROLLIS RCT (ACTRN12613000655741) sites. Participants underwent preoperative lesion localisation (PLL) with seed or HW between September 2013 and December 2017. Lesion and procedural characteristics were recorded. Distances between (1) any part of the seed or thickened segment of the HW ('TSHW') and the lesion/clip ('distance to device' DTD) and (2) centre of the TSHW/seed and centre of the lesion/clip (device centre to target centre 'DCTC') were measured on immediate postinsertion mammograms. Pathological margin involvement and re-excision rates were compared. A total of 390 lesions (190 ROLLIS and 200 HWL) were analysed. Lesion characteristics and guidance modality used were similar between groups. Ultrasound-guided DTD and DCTC for seed were smaller than for HW (77.1% and 60.6%, respectively, P-value < 0.001). Stereotactic-guided DCTC for seedswas 41.6% smaller than for HW (P-value = 0.001). No statistically significant difference in the re-excision rates was found. Iodine-125 seeds can be more precisely positioned for preoperative lesion localisation than HW, however, no statistically significant difference in re-excision rates was detected.

Radioguided Occult Lesion Localization for Gynecologic Tumor Relapses: Development of a Technique.

Excision of peritoneal or nodal isolated recurrences frequently involves performing a surgery on a previously operated area, which is more difficult to achieve with minimally invasive approaches. Our aim was to describe the technical aspects, feasibility, and complications derived from the application of the radioguided occult lesions localization (ROLL) in gynecologic oncology recurrence excision. All consecutive patients bearing localized relapses of a gynecologic tumor that were considered candidates for surgical excision were assessed to undergo a ROLL procedure. Radiotracer ( 99m Tc-albumin macroaggregate) injection of the lesions was performed by ultrasonography or CT guidance. Relapses were localized using a gamma probe by minimally invasive surgery when located in the abdomen, or percutaneously when located in the groin. Intraoperative and early (up to postoperative day 30) complications were prospectively recorded. A total of 8 patients underwent the procedure. The median age was 59 years (range, 35-87 years). Four patients had abdominal relapses, whereas 4 patients presented groin relapses. The mean operative time was 120 minutes (range, 30-190 minutes), whereas the median estimated blood loss was 5 mL (range, 0-150 mL). All the targeted lesions were successfully removed. No intraoperative complications were reported. One postoperative complication (inguinal lymphocele) was recorded. ROLL surgery constitutes a new approach for isolated recurrences in gynecological tumors.

Selective Axillary Dissection after Neoadjuvant Chemotherapy in Patients with Lymph-Node-Positive Breast Cancer (CLYP Study): The Radio-Guided Occult Lesion Localization Technique for Biopsy-Proven Metastatic Lymph Nodes

(1) Background: To help to refine the accuracy of sentinel lymph node biopsy (SLNB) in breast cancer (BC) patients with biopsy-proven nodal disease prior to neoadjuvant chemotherapy (NACT), a method of marking the biopsy-proven positive LN at diagnosis to enable its removal during surgery was proposed. The aim of this study was to evaluate the accuracy of the Radio-Guided Occult Lesion Localization (ROLL) technique of biopsy-proven metastatic LN in nodal staging after NACT among node-positive BC patients. (2) Methods: Patients with invasive BC and biopsy-proven axillary metastases receiving NACT were enrolled. A clip marker was placed on the sampled LN (clipped lymph node, CLN) before NACT. Before surgery, the ROLL procedure (radioactive tracer injection into CLN under ultrasound guidance) was performed, and the CLN was surgically resected. The correspondence between the CLNs and SLNs was evaluated. The pathologic findings of the CLNs and SLN(s) were compared with remaining axillary nodes at ALND to determine false negative rates (FNRs). (3) Results: Seventy-two patients were analyzed. Surgery successfully identified the CLN in 70/72 procedures (97.2%). For 60/72 patients who underwent ALND, the FNRs dropped from 19.35% for SLNB to 3.13% for CLN biopsy. (4) Conclusions: The ROLL procedure got CLNs is accurate in axillary nodal staging after NACT in node-positive BC patients at diagnosis.

Targeted axillary dissection using Radioguided Occult Lesion Localization technique in the clinically negative marked lymph node after neoadjuvant treatment in breast cancer patients

PurposeTo be aware of the feasibility of targeted axillary dissection (TAD) injecting 99mTechnetium-labeled macroaggregated albumin (99mTc-MAA) preoperatively into the clipped lymph node of patients with axillary complete clinical response (ycN0), after neoadjuvant chemotherapy (NAC) for breast cancer. Patients and methodsA retrospective observational study was performed on N1 patients with a clipped positive node and a clinically negative axilla (ycN0) after NAC in one center. The pretreatment positive lymph node was injected with 99mTc-MAA the day before surgery and identified intraoperatively with a radioguided occult lesion localization (ROLL) technique. Patients were subjected to a TAD with the intent of identifying the clipped node and other/s sentinel nodes through a standard sentinel lymph node biopsy (SLNB). Results54 patients and 55 axillary clipped nodes were included. The clip was intraoperatively encountered in every patient, accomplishing a 100% detection rate, although in one case no lymphatic tissue could be found in the intraoperative frozen section. An axillary lymph node dissection (ALND) was avoided in 62.9% of the cases (34/54). ConclusionThe use of the ROLL technique is a highly valuable tool since it allows a 100% success rate in retrieving the marker (and a 98.1% rate in detecting the clipped lymph node) in ycN0 breast cancer patients.

Abstract P3-04-09: 3-dimensional intraoperative analysis of screen-detected breast cancers reduce re-excision rates

Abstract Introduction: Breast conserving therapy, has generally been accepted as treatment of choice for early invasive breast cancer. However adequate local control depends on obtaining negative margins and receipt of radiation In 20-30 % of patients with breast conserving surgery a second re-excision procedure is due to tumor-positive margins at histopathology. Margins re-excision rate are variable across the countries. Mean re-excision rate of 17.2% across units in UK. Intraoperative specimen radiography,used to evaluate partial mastectomy specimens ensure that the lesion is adequately removed. Objective: to determine whether 3D-intraoperative imaging better predicts margin status and reduces the re-excision rate than conventional 2D imaging. Methods: Retrospective study comparing two cohorts of patients 360 screen-detected breast cancer (2D cohort). April 2015 to March 2018 300 screen-detected breast cancer (3D cohort) April 2018 to March 2021 Royal Cornwall Hospital (RCHT) introduced a 3D intraoperative system for all cases in April 2018 Prior to the introduction of 3D intraoperative imaging at RCHT the re-excision rate was stable at approximately 15%. All patient had undergone preoperative digital mammogram and ultrasound. All patients had core biopsy diagnosis All malignancies were localised with ROLL (Radio-guided occult lesion localization) techniques. All wide local excision were performed by 5 fully trained oncoplastic breast surgeons (similar distribution within the two cohort) Specimen radiograph was performed intraoperatively using: 2D x-ray device (Faxitron system; Trident Hologic, Marlborough, MA) or 3D tomosynthesis (Mozart system; Kubtec Medical imaging, Stratford,CT). For both methods of assessment,specimen was placed in the device and auto exposed without any compression of tissue. All specimens were marked with orienting sutures and clips according to local protocol. All specimens were painted in theatre by the operating surgeon. All specimens were examined by the same pathologists. No change in margin protocol for 12 years(already compliant to ABS guidelines) • A clear margin for invasive cancer was defined as tumour found within 1mm of margin. For ductal carcinoma in situ (DCIS), a margin was classified as positive if ink on tumour, was classified as close ink is found in under 2 mm from tumour and as negative if more or equal to 2 mm, in accordance with NICE guidelines. (22) Statistical Analysis: • The study compares patient demographics, histology, and re-excision rates between 2D and 3D • Descriptive and comparative statistics are be calculated for all collected data TABLE 1: 3D/2D RR 0.59 (P:0.01), CI 0,3369-09068, Z -2.3473, P 0.0189 Conclusions: The use of intraoperative 3D specimen X-ray reduced the relative risk of re-excision rate by 41% (P=0.01) without any negative impact on other parameters. Table 1: Results 3D intraoperative imaging versus 2D intraoperative imaging Citation Format: Jo Mondani, Hamza Arabiyat, Stavroula Kastora, Mona Sulieman, Imran Abbas, Polly King, Rachel English, Iain Brown, Miklos Barta, Nicola Jackson, Philip Drew. 3-dimensional intraoperative analysis of screen-detected breast cancers reduce re-excision rates [abstract]. In: Proceedings of the 2022 San Antonio Breast Cancer Symposium; 2022 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2023;83(5 Suppl):Abstract nr P3-04-09.

Radioguided occult lesion localisation: A retrospective audit at a single tertiary academic breast unit

Background: The radioguided occult lesion localisation (ROLL) technique was introduced at Groote Schuur Hospital in 2003 replacing the wire-guided localisation (WGL) technique. In the case of preoperative histologically proven impalpable breast cancers, a sentinel lymph node (SLN) biopsy was done simultaneously (sentinel node [SN] with occult lesion localisation or SNOLL).Aim: To assess the efficacy of the ROLL and SNOLL techniques for diagnostic and therapeutic excisions.Setting: A retrospective record analysis of 190 patients who underwent a ROLL procedure for diagnostic or therapeutic excision of occult breast lesions was performed at a large tertiary hospital in the Western Cape.Methods: Data were collected on patient and tumour characteristics, successful localisation rates, the volume of tissue removed, complete tumour resection rates, the number of re-operations performed and the proportion of SLN detection. The Pearson’s chi-squared test was used to test for significance between variables at α = 0.05.Results: Correct radiopharmaceutical placement was achieved in 177/190 (93.2%) lesions. Histologic examination of excised specimens confirmed 115/190 (61.0%) malignant and 75/190 (39.0%) benign lesions. Involved margins were found in 37/115 (32.2%). Complete excision with adequate margins occurred in 50/70 (71.4%) of cases of invasive cancer and in 11/45 (24.4%) of ductal carcinoma in situ (DCIS). The SN was successfully identified in 30/37 (81.1%) of SNOLL cases.Conclusion: Radioguided occult lesion localisation is an effective tool in the preoperative localisation of occult lesions for surgical biopsy as well as the removal of impalpable breast cancers. A single intratumoural injection with 99mTc nanocolloid combined with lymphoscintigraphy is a reliable method of localising the SN.

Iodine-125 seed versus hook-wire guided breast conserving surgery: do post operative complication rates differ?

Radio-guided occult lesion localisation using iodine 125 seeds (ROLLIS) is used to localize impalpable breast cancers for breast conserving surgery (BCS). Previous studies have suggested improved efficiency and patient outcomes with ROLLIS compared with hook-wire localisation (HWL). The aim of this report is to compare the post-operative complication rates and safety profiles of ROLLIS versus hook-wire guided surgery. Between September 2013 and March 2018, 690 women with non-palpable breast cancer eligible for breast-conserving surgery were randomly assigned to either pre-operative localisation with 125 I seed or hook-wire as part of the ROLLIS clinical trial. Medical record review of 170 women (30% of the total participants) from three tertiary hospitals in Western Australia was performed. Post-operative complications were classified using the Common Terminology Criteria for Adverse Events(CTCAE) grade I to V. Total of 170 surgeries were performed: 82 by ROLLIS and 88 by hook-wire. The overall complication rate in the ROLLIS group was 19.5%, with 15.9% being grade II and 3.66% grade III. In the HWL group, the complication rate was 22.7% with 20.5% being grade II and 2.27% grade III. There was no statistically significant difference in complication grades between the 2 groups. No grade IV or grade V complications were reported. Complications observed included drainable seroma, drainable haematoma and surgical site infection. ROLLIS is a safe method of localisation for surgical resection with similar complication rates as hookwires. We encourage its use as an alternative localisation technique as it has demonstrable superiority and efficacy.

PD30 Radioactive Seed Localization And Radio-Guided Occult Lesion Localization For Non-Palpable Breast Cancer Surgery: A Meta-Analysis

IntroductionNon-palpable breast cancers require intraoperative localization to guide the surgical procedure. The radio-guided occult lesion localization (ROLL) and radioactive seed localization (RSL) techniques use radioactive material (technetium-99m labeled macroaggregated albumin and iodine-125 seeds, respectively) implanted at the lesion site. The success of conservative surgery depends on complete tumor excision with negative surgical margins. The objective of this study was to perform a meta-analysis of the surgical effectiveness of the ROLL and RSL techniques with respect to rates of positive surgical margins, reoperation, and recurrence.MethodsA systematic search of the PubMed, Embase, LILACS, SciELO, and Web of Science databases was performed on 2 August 2021. A standard form was used to extract data from the studies selected in the screening process. The ROBINS-I tool was used to analyze risk of bias and RevMan 5.4 software was used to perform the meta-analysis.ResultsFour observational studies met the inclusion criteria. The overall evidence quality was moderate. The studies included women aged from 28 to 91 years with non-palpable breast cancer. The results demonstrated similar effectiveness between RSL and ROLL for rates of positive surgical margins (risk ratio [RR] 0.83, 95% confidence interval [CI]: 0.50, 1.39; 763 patients) and reoperation (RR 1.14, 95% CI: 0.75, 1.74; 1,550 patients). Regarding the rate of disease recurrence, RSL was superior to ROLL (RR 0.50, 95% CI: 0.29, 0.87; 939 patients).ConclusionsThe results demonstrate that the ROLL and RSL techniques are equivalent with respect to rates of positive surgical margins and reoperation, although patients undergoing RSL had lower rates of disease recurrence. However, there is a tendency to favor the RSL technique because of the longer interval between implantation and surgery, which is possible due to the longer half-life of iodine-125 (59.4 days). This also means that radioactive seed implantation can occur before neoadjuvant chemotherapy, so the tumor bed remains marked if further interventions are required, obviating the need for another invasive procedure before surgery.

Preoperative localization of lung nodules: a comparative analysis of hookwire and radio-guided procedures.

Histological diagnosis of pulmonary nodules requires surgical resection on many occasions. There are multiple localization strategies each with their own benefits and complications. The objective of this study is to compare preoperative lung nodule localization with hookwire and radiotracer injection (radioguided occult lesion localization, ROLL). To compare results, complications, and volume of the sample resected with both techniques. Patients undergoing resection of pulmonary nodules with video-assisted thoracoscopy and pre-surgical localization with hookwire or ROLL were studied. Eighty-eight pulmonary nodules were resected in 76 patients: 52 with a hook wire and 36 with a radiotracer. The localization rate, the shortest distance between the nodule and the pleura, the intrapulmonary distance of the locator, the complications, the volume of the resection piece, and the histological result were all assessed. In addition, the factors that influence the volume of the surgical piece were analyzed. All the nodules were resected with both techniques. The intrapulmonary path of the locator is longer for the ROLL group (23.91 vs. 16.28 mm; P=0.04), with no differences in the distance from the nodule to the pleura. The rate of pneumothorax was significantly higher after the placement of a hook wire (69.2% vs. 24.2%; P<0.0001), while there were no differences in the presence of hemorrhage. The volume of the pieces resected using ROLL was more minor than with hookwire, although not statistically significant (20.19 vs. 34.26 cc; P=0.07). Preoperative localization with the ROLL technique is safer than the placement of hookwire. In addition, the ROLL technique shows a tendency to obtain a smaller volume of resected tissue since the marking is not affected by the intrapulmonary route used during marker placement. ROLL technique allows to locate lung nodules with fewer complications than hookwire and probably gets smaller resection samples.

Thyroid cancer relapse as a challenge to a surgeon: The efficacy of radioguided occult lesion localization (roll) technique

Thyroid cancer relapse as a challenge to a surgeon: The efficacy of radioguided occult lesion localization (roll) technique

Radioguided occult lesion localisation: A retrospective audit at a single tertiary academic breast unit

The South African Journal of Oncology is a peer-reviewed on-line journal which publishes high quality articles on all aspects of oncology. The Editorial Board strongly supports a multidisciplinary approach to cancer care research as well as translational research in oncology.

Magseed placement before neoadjuvant chemotherapy to facilitate subsequent breast-conserving surgery – a single-centre audit

BACKGROUND: A radio-opaque clip is placed in all patients planned for breast-conserving surgery (BCS) receiving neoadjuvant chemotherapy (NACT) to localise the tumour bed in case response to chemotherapy makes later localisation impossible. A tumour that was localised with a radio-opaque clip before NACT will then need a second localisation procedure, after the completion of NACT to aid BCS. The two most commonly used methods are hookwire and radio-guided occult lesion localisation. Magseed®, a newly available technology consisting of a small magnetic seed, has now become available. The seed is placed instead of a radio-opaque clip before the start of or during NACT and can remain in place until the time of BCS. METHODS: A retrospective cohort study was performed, collecting data on patients who had a Magseed placed before or during NACT from December 2018 to February 2020. RESULTS: Twenty-one Magseed devices were placed into the breasts of 20 patients, 18 under ultrasound guidance, and three under stereotactic guidance. The average breast volume of individuals who had seeds placed was 1 532 g ± 869 g. The duration that the seeds were in situ was 138 days ± 45 days. All preoperatively placed seeds were retrieved at the surgery with no observed migration outside the tumour bed. CONCLUSION: Magseed placement before NACT is a safe and technically simple technique that can be done under ultrasound guidance in the majority of cases. It has the advantage of being a single procedure with an associated reduction in time off work and travel cost to the patient, as well as flexibility in terms of the time of placement.