Radical Local Excision Research Articles

Local excision versus total mesorectal excision for rectal cancer patients with clinical complete or near-complete response after neoadjuvant chemoradiotherapy

PurposeLocal excision is an effective approach for managing rectal cancer exhibiting substantial regression after neoadjuvant chemoradiotherapy. The purpose of this study is to compare the outcomes between local excision and total mesorectal excision in rectal cancer patients achieving clinical complete or near-complete response after neoadjuvant chemoradiotherapy.MethodsThis is a retrospective cohort study that includes a consecutive series of rectal cancer patients who responded well to neoadjuvant chemoradiotherapy followed by surgery. A total of 180 rectal cancer patients at a single institution during a 12-year period are included. The main outcomes include short-term outcomes, oncological outcomes, and functional outcomes between the two groups.ResultsA total of 180 patients were included in the study. Sixty-one (33.9%) received local excision and 119 (66.1%) received total mesorectal excision. The baseline characteristics were generally balanced between the two groups. The local excision group demonstrated a significantly shorter operative time, less blood loss, and shorter hospital stay (p < 0.001). 3-year overall survival rates were 97.5% (95% CI, 0.93–1.00) and 95.5% (95% CI, 0.91–1.00) between the two groups (p = 0.38). The local excision group exhibited significantly higher 3-year local recurrence rates 15.7% (95% CI, 0.74–0.97) vs 4.2% (95% CI, 0.92–1.00) (p = 0.017), yet lower 3-year distant metastasis rates 9.6% (95% CI, 0.82–1.00) vs 12.6% (95% CI, 0.81–0.94) (p = 0.33) and lower 3-year disease-free survival rates 76.8% (95% CI, 0.64–0.92) vs 84.7% (95% CI, 0.78–0.92) (p = 0.56) comparing with the total mesorectal excision group. The local excision group demonstrated significantly better functional outcomes compared with the total mesorectal excision group (p < 0.001).ConclusionPatients who achieve either clinical complete or near-complete response after neoadjuvant chemoradiotherapy are suitable candidates for local excision. The local excision group demonstrated superior short-term and functional outcomes, and the oncological outcomes were not compromised.

Conservative Management of Vulvar Cancer-Where Should We Draw the Line?

Vulvar cancer is a rare disease, and cure rates were low until the mid-20th century. The introduction of an en bloc radical vulvectomy and bilateral groin and pelvic lymph node dissection saw them rise from 15-20% to 60-70%. However, this very radical surgery was associated with high physical and psychological morbidity. Wounds were usually left open to granulate, and the average post-operative hospital stay was about 90 days. Many attempts have been made to decrease morbidity without compromising survival. Modifications that have proven to be successful are as follows: (i) the elimination of routine pelvic node dissection, (ii) the use of separate incisions for groin dissection, (iii) the use of unilateral groin dissection for lateral, unifocal lesions, (iv) and radical local excision with 1 cm surgical margins for unifocal lesions. Sentinel node biopsy with ultrasonic groin surveillance for patients with node-negative disease has been the most recent modification and is advocated for patients whose primary cancer is <4 cm in diameter. Controversy currently exists around the need for 1 cm surgical margins around all primary lesions and on the appropriate ultrasonic surveillance for patients with negative sentinel nodes.

Soft Tissue Sarcomas at Atypical Locations in Gynecologic Oncology: A Series of 3 Cases

PurposeThe most frequent primary site of sarcomas in gynecologic oncology is uterus (83%) followed by ovary (8%), vulva and vagina (5%). We present three cases of sarcomas at atypical locations.MethodRecords of cases were retrieved from electronic medical records, and telephonic follow-up was done to know their current status.ResultCase 1: A 26-year-old parous lady presented with complaint of recurrent vulvar mass. Biopsy at our institute revealed myxoid liposarcoma. Metastatic workup was negative. She underwent radical local excision with VY-plasty and bilateral ovarian transposition (BOT) followed by concurrent chemo-radiotherapy. She is disease free at 12 months. Case 2: A 29-year-old lady presented with large bleeding mass arising from right wall of vagina. Histopathology report of vaginal biopsy was high-grade leiomyosarcoma. MRI pelvis with thorax and abdomen scan, examination under anesthesia and cystoscopy revealed non-metastatic operable disease. She underwent radical hysterectomy with vaginectomy with BOT followed by pelvic radiotherapy. At 4-month follow-up, she presented with scalp lesion. Further workup revealed disseminated metastatic disease. She is on palliative chemotherapy at the time of submission or article. Case 3: A 54-year-old lady underwent evaluation for pain abdomen with contrast-enhanced computed tomography which revealed a large omental mass. She had past history of carcinoma cervix 6 years back treated outside with surgery and chemo-radiotherapy. Image-guided biopsy was reported as leiomyosarcoma. Metastatic workup showed no disease elsewhere. She underwent omental mass excision followed by chemotherapy. She is disease free at 13 months.ConclusionSurgery remains the mainstay of treatment in non-metastatic sarcomas. Long-term follow-up of patients is needed in view of their atypical presentation.

Survival prognostic in different age groups of patients undergoing local versus radical excision for rectal cancer: a study based on the SEER database.

Age significantly affects the prognosis of patients with rectal cancer after radical excision (RE), and local excision (LE) is an alternative surgical procedure to RE. To compare the survival prognosis in different age groups of LE versus RE for rectal cancer. Patients diagnosed with rectal adenocarcinoma treated by LE or RE from 2010 to 2017 were obtained from the SEER database. The primary outcomes are 5-year OS and CSS. A total of 11,170 patients were eventually included, and there were 490 patients in LE and RE groups, respectively, after 1:1 propensity score matching. The 5-year OS and CSS after LE were significantly better in < 50years and 50-66years groups than in > 66years group (5-year OS: 95.70% vs 88.40% vs 67.00%, P < 0.001; 5-year CSS: 95.70% vs 96.30% vs 82.60%, P < 0.001). No statistical significance was found for the differences in 5-year OS and CSS between LE and RE in < 50, 50-66, and > 66years group (P > 0.05). Multivariate analysis showed age > 66years, poorly differentiated or undifferentiated (Grade III/IV), and tumor size 3 to 5cm was independent risk factors for 5-year OS after LE; age > 66years, perineural invasion, and tumor size 3 to 5cm were the 5-year CSS independent risk factors for after LE. We found that the survival prognosis of younger rectal cancer patients treated with LE was significantly better than older (> 66years) patients, and the survival prognosis of rectal cancer patients in the three age groups was similar between LE and RE.

Local excision versus radical surgery for anal squamous cell carcinoma: a multicenter study in Japan

BackgroundThe standard treatment for anal squamous cell carcinoma is chemoradiation therapy (CRT), but there is a possibility of over-treatment for early-stage disease. cTisN0 and cT1N0 disease is currently indicated for local excision, but it is unclear whether the indication of local excision can be expanded to cT2N0 disease.Methods126 patients with cTis-T2N0 anal cancer treated at 47 centers in Japan between 1991 and 2015 were included. Patients were first classified into the CRT group and surgical therapy group according to the initial therapy, and the latter was further divided into local excision (LE) and radical surgery (RS) groups. We compared prognoses among the groups, and analyzed risk factors for recurrence after local excision.ResultsThe CRT group (n = 87) and surgical therapy group (n = 39) showed no difference in relapse-free survival (p = 0.29) and overall survival (p = 0.94). Relapse-free survival curves in the LE (n = 23) and RS groups (n = 16) overlapped for the initial 3 years, but the curve for the LE group went lower beyond (p = 0.33). By contrast, there was no difference in overall survival between the two groups (p = 0.98). In the LE group, the majority of recurrences distributed in locoregional areas, which could be managed by salvage treatments. Muscular invasion was associated with recurrence after local excision (hazard ratio: 22.91, p = 0.011).ConclusionLE may be applied to selected patients with anal cancer of cTis-T2N0 stage. Given the high risk of recurrence in cases with muscular invasion, it may be important to consider close surveillance and additional treatment in such patients.

Long-term outcomes of 1–2 cm rectal neuroendocrine tumors after local excision or radical resection: A population-based multicenter study

ObjectivesStudies on rectal neuroendocrine tumors (R-NETs) that are 1–2 cm in size are limited, and the optimal treatment for these tumors is not well established. MethodsData from patients with primary localized R-NETs 1–2 cm in size were retrospectively collected from 17 large-scale referral medical centers in China. Long-term prognosis, quality of life (QOL), and fecal incontinence were evaluated, and the effects of local excision (LE) or radical resection (RR) were elucidated using propensity score matching (PSM). ResultsA total of 272 patients were included in this study; 233 underwent LE, and the remaining 39 underwent RR. Patients in the LE group showed lower tumor location, fewer postoperative Clavien–Dindo III–V complications, more G1 tumors, and lower tumor stage. There were no significant differences in the relapse-free survival or overall survival (OS) between the LE and RR groups after PSM. Patients in the LE group reported superior physical, role, emotional, social, and cognitive functions, global QOL, and Wexner fecal incontinence scores compared with those in the RR group (all P < 0.050). Eighteen (6.6%) patients had lymph node metastases. Multivariable analysis revealed that tumor location (odds ratio [OR] = 3.19, 95% confidence interval [CI] 1.04–10.07, P = 0.010), neutrophil-to-lymphocyte ratio (NLR) > 1.80 (OR = 4.50, 1.46–15.89, P = 0.012), and T3–T4 (OR = 36.31, 95% CI 7.85–208.62, P < 0.001) were independent risk factor for lymph node metastasis. ConclusionsR-NETs measuring 1–2 cm generally have a favorable prognosis, and there is no difference in postoperative survival between LE and RR. For patients without lymph node metastasis, LE should be the preferred choice; however, for patients with a higher tumor location, preoperative NLR >1.8 or T3/T4 tumors, RR should be considered.

Local Excision Versus Radical Resection for Grade 2 Rectal Neuroendocrine Tumors: A Multicenter Propensity Score-Matched Analysis.

Studies on grade 2 rectal neuroendocrine tumors are limited, and the optimal treatment for these tumors is not well established. We aimed to compare the oncologic results of local excision versus radical resection for the treatment of grade 2 rectal neuroendocrine tumors. Retrospective multicenter propensity score-matched study to minimize heterogeneity between groups and focus on the differences between surgery strategies. Seventeen large-scale Chinese medical centers participated in this study. A total of 144 patients with pathologically confirmed grade 2 rectal neuroendocrine tumors were retrospectively analyzed. Cancer-specific survival and relapse-free survival were assessed to compare surgery strategies. A total of 144 patients with grade 2 rectal neuroendocrine tumors were enrolled in this study. Twenty-seven patients underwent endoscopic resection, 55 underwent transanal excision, 50 underwent radical resection, and 12 underwent palliative surgery or biopsy for distant metastasis. Of the 50 patients who underwent radical resection, 30 (60.0%) had clinically positive lymph nodes on the basis of the histopathology results. The optimal cutoff value for tumor size to predict cancer-specific survival was 1.5 cm. In patients with grade 2 rectal neuroendocrine tumors of ≤1.5-cm size, there were no significant differences in cancer-specific survival and relapse-free survival between local excision and radical resection groups ( p > 0.05). In patients with grade 2 rectal neuroendocrine tumors of >1.5-cm size, relapse-free survival was significantly lower in the local excision group than in the radical resection group ( p = 0.04). The nature of retrospective reviews and a relatively short follow-up period are limitations of this study. Grade 2 rectal neuroendocrine tumors have a nonnegligible rate of lymph node metastasis. Local excision is a feasible choice for tumors of ≤1.5 cm size without metastasis, whereas radical resection is more beneficial in those of >1.5 cm size. See Video Abstract . ANTECEDENTES:Los estudios sobre los tumores neuroendocrinos rectales de grado 2 son limitados y el tratamiento óptimo para estos tumores no está bien establecido.OBJETIVO:Comparar los resultados oncológicos de la escisión local versus la resección radical para el tratamiento de tumores neuroendocrinos rectales grado 2.DISEÑO:Estudio multicéntrico retrospectivo emparejado por puntuación de propensión para minimizar la heterogeneidad entre grupos y centrarse en la diferencia entre estrategias quirúrgicas.ESCENARIO:Diecisiete centros médicos chinos de gran tamaño participaron en este estudio.PACIENTES:Se analizaron retrospectivamente un total de 144 pacientes con tumores neuroendocrinos rectales grado 2 patológicamente confirmados.PRINCIPALES MEDIDAS DE RESULTADO:Se evaluaron la supervivencia específica del cáncer y la supervivencia libre de recaída para comparar las estrategias quirúrgicas.RESULTADOS:En este estudio se inscribieron un total de 144 pacientes con tumores neuroendocrinos rectales grado 2. Veintisiete pacientes se sometieron a resección endoscópica, 55 a escisión transanal, 50 a resección radical y 12 a cirugía paliativa o biopsia por metástasis a distancia. De los 50 pacientes que se sometieron a resección radical, 30 (60,0%) tenían ganglios linfáticos clínicamente positivos según los resultados histopatológicos. El valor de corte óptimo para el tamaño del tumor para predecir la supervivencia específica del cáncer fue de 1,5 cm. En pacientes con tumores neuroendocrinos rectales grado 2 ≤ 1,5 cm, no hubo diferencias significativas en la supervivencia específica del cáncer y la supervivencia libre de recaída entre los grupos de escisión local y resección radical ( p >0,05). En pacientes con tumores neuroendocrinos rectales grado 2 > 1,5 cm, la supervivencia libre de recaída fue significativamente menor en el grupo de escisión local que en el grupo de resección radical ( p = 0,04).LIMITACIONES:La naturaleza de la revisión retrospectiva y el período de seguimiento relativamente corto son limitaciones de este estudio.CONCLUSIONES:Los tumores neuroendocrinos rectales grado 2 tienen una tasa no despreciable de metástasis en los ganglios linfáticos. La escisión local es una opción factible para tumores ≤ 1,5 cm sin metástasis, mientras que la resección radical es más beneficiosa en aquellos > 1,5 cm. (Traducción-Dr. Felipe Bellolio ).

Total mesorectal excision after rectal-sparing approach in locally advanced rectal cancer patients after neoadjuvant treatment: a high volume center experience.

In patient with a complete or near-complete clinical response after neoadjuvant treatment for locally advanced rectal cancer, the organ-sparing approach [watch & wait (W&W) or local excision (LE)] is a possible alternative to major rectal resection. Although, in case of local recurrence or regrowth, after these treatments, a total mesorectal excision (TME) can be operated. In this retrospective study, we selected 120 patients with locally advanced rectal cancer (LARC) who had a complete or near-complete clinical response after neoadjuvant treatment, from June 2011 to June 2021. Among them, 41 patients were managed by W&W approach, whereas 79 patients were managed by LE. Twenty-three patients underwent salvage TME for an unfavorable histology after LE (11 patients) or a local recurrence/regrowth (seven patients in LE group - five patients in W&W group), with a median follow-up of 42 months. Following salvage TME, no patients died within 30 days; serious adverse events occurred in four patients; 8 (34.8%) patients had a definitive stoma; 8 (34.8%) patients undergone to major surgery for unfavorable histology after LE - a complete response was confirmed. Notably active surveillance after rectal sparing allows prompt identifying signs of regrowth or relapse leading to a radical TME. Rectal sparing is a possible strategy for LARC patients although an active surveillance is necessary.

Comparing neoadjuvant therapy followed by local excision to total mesorectal excision in the treatment of early stage rectal cancer: a systematic review and meta-analysis of randomised clinical trials.

Total mesorectal excision (TME) is the standard-of-care in early, clinical stage (cT2-3 N0 M0) rectal cancer. Local excision (LE) may be an alternative after adequate response to neoadjuvant therapy (NAT), with either long-course chemoradiotherapy (nCRT) or short-course radiotherapy (SCRT), as a means of preserving the rectum and potentially obviating the morbidity of TME. A systematic review was performed according to PRISMA guidelines for studies that randomly assigned patients with cT2-3 N0 M0 rectal cancer to either NAT + LE or TME that reported radiologic, oncologic, surgical, and morbidity outcomes. A total of 4 RCTs comprise 462 patients (232 patients receiving NAT + LE; nCRT n = 205; SCRT n = 27) and 230 undergoing TME, respectively. NAT compliance was 98.86%. The rate of early completion TME in the NAT + LE group was 22.3%, while the proportion of patients achieving durable organ preservation was 75.4% at mean follow-up of 5.6years. There was no difference in disease-free survival (DFS) (HR [hazard ratio] 1.19; 95% CI 0.95, 1.49; p = 0.13) or overall survival (OS) (HR 0.94; 95% CI 0.72, 1.23; p = 0.63]) according to the assigned treatment arm. The local recurrence rate (LRR) (HR 1.22; 95% CI 0.5-3.02; p = 0.66) and distant metastases (HR 0.92; 95% CI 0.45, 1.90; p = 0.82) were also comparable between the groups. There was a significant reduction in major (OR 0.45; 95% CI 0.21, 0.95; p = 0.04) and minor morbidity (OR 0.45; 95% CI 0.24, 0.85; p = 0.01) for patients undergoing NAT + LE. Overall stoma formation was decreased in the NAT + LE group (OR 0.03; 95% CI 0.0, 0.23; p ≤ 0.00001). NAT + LE reduces adverse effects of TME, without any compromise in oncological outcomes, and the potential for an organ preserving strategy should be discussed with patients with T2-3N0 rectal cancers prior to treatment.

Transanal local excision versus intersphincteric resection for low rectal cancer with stage ypT0-1ycN0 after neoadjuvant chemoradiotherapy: an inverse probability weighting analysis for oncological and functional outcomes.

This study aimed to compare the efficacy of local excision (LE) and intersphincteric resection (ISR) in patients with locally advanced rectal cancer who achieved a significant or complete pathological response following neoadjuvant chemoradiotherapy. We performed a retrospective analysis of data from patients with stage ypT0-1ycN0 low rectal cancer after neoadjuvant chemoradiotherapy who underwent LE or ISR between June 2016 and June 2021. Baseline characteristics, short-term outcomes, long-term oncological outcomes, and functional outcomes, were compared between the two groups. To reduce the selection bias, inverse probability of treatment weighting (IPTW) was performed. This study included 106 patients (LE group: n = 51, ISR group: n = 55). There were significant differences in baseline characteristics between the two groups (P < 0.05). After IPTW, there were almost no significant differences in baseline data between the two groups. The LE group showed less postoperative complications and better function outcomes compared to the ISR group. The LE group had significantly lower rates of complications (13.7% vs. 36.4%, P = 0.014). There were no significant differences between the two groups in terms of long-term oncological outcomes. For patients with locally advanced low rectal cancer achieving significant or complete pathological response after neoadjuvant therapy, both LE and ISR present comparable oncological outcomes. Yet, LE seems to show more advantages in terms of postoperative complications and functional outcomes. These findings offer important insights for surgical decision-making, emphasizing the necessity to consider both oncological and functional outcomes in selecting the optimal surgical approach.

Local excision versus thrombectomy in thrombosed external hemorrhoids: a multicenter, prospective, observational study

BackgroundAvailable guidelines describing the procedural treatment of thrombosed external hemorrhoids (TEH) rely solely on expert opinion. We aimed to compare local excision (LE) and thrombectomy (incision) in terms of treatment success, factors affecting success, and outcomes.MethodsThis was a multicenter, prospective, observational study conducted in eight centers from September 2020 to September 2021. A total of 96 patients (58 LE, 38 thrombectomy) were included. Risk factors, demographics and clinical characteristics were recorded. Follow-up studies were scheduled for the 1st week, 1st, 3rd and 6th months. Surgical success was assessed at 1 month. Hemorrhoidal Disease Symptom Score (HDSS) and Short Health Scale (SHS) were applied at baseline and the 6th month. Wexner fecal incontinence score was applied at all follow-up studies.ResultsOverall mean age was 41.5 ± 12.7 years. At baseline, groups were similar with regard to demographics and disease severity (HDSS) (p > 0.05 for all). Success was relatively higher in the thrombectomy group (86.8%) compared to the LE group (67.2%) (p = 0.054). Constipation and travel history were significantly associated with lower likelihood of LE success. Symptoms during follow-up were similarly distributed in the groups. Both methods yielded significant improvements in HDSS, SHS and Wexner scores; however, SHS scores (6 months) and Wexner scores (all time points) were significantly better in the thrombectomy group.ConclusionThe in-office thrombectomy procedure may have better short-term outcomes compared to LE in terms of relative success, recurrence and quality of life–despite the fact that success rates were statistically similar with the two interventions. LE may yield particularly worse results in patients with constipation and travel history; thus, thrombectomy appears to be especially advantageous in these patient subsets.

Local versus radical surgery for early rectal cancer with or without neoadjuvant or adjuvant therapy.

Local versus radical surgery for early rectal cancer with or without neoadjuvant or adjuvant therapy.

Epithelioid Hemangioendothelioma arising from nasal cavity: A Rare Case

Introduction: Epithelial Hemangioendothelioma is an uncommon malignancy of soft tissues, mostly occur in females in their 4th and 5th decades of life. It is very rare to occur in nasal cavity and prone to have local recurrences and distant metastasis. Here we present a 37 year old male patient with epithelioid hemangioendothelioma in nasal cavity with extension to the surrounding structures. Case report: Patient presented to University Hospital - Kotelawala Defense University with a history of right side nasal obstruction, facial pain and headache. Imaging studies showed large focal lesion with extension to the surrounding structures and impending intracranial extension. Endoscopy and neuronavigator guided tumor excision done and histopathology report came as epithelioid hemangioendothelioma. Conclusion: Radical local excision is the key important step in the management of Epithelioid hemangioendothelioma.

Rectal Sparing Approaches after Neoadjuvant Treatment for Rectal Cancer: A Systematic Review and Meta-Analysis Comparing Local Excision and Watch and Wait.

Local Excision (LE) or Watch and Wait (WW) for patients with complete clinical response or near-complete clinical response after neoadjuvant chemoradiotherapy (nCRT) were proposed to avoid morbidity and impairment of quality of life after rectal resection. The aim of this study is to perform a systematic review of the literature, and to compare rectal-sparing approaches, in terms of rectum-preservation rate, local control, and distant recurrences. A systematic review and meta-analysis were performed of studies published until July 2022 (PROSPERO, registration CRD42022341480), and the quality of evidence was assessed using a GRADE approach. Seven retrospective studies and one prospective trial were included. In six studies, patients were treated with standard long-course nCRT, and in two with Total Neoadjuvant Therapy (TNT). Overall, there were 213 and 188 patients in WW and LE group, respectively, and no difference was found between WW and LE when considering rectum-preservation rate (OR 0.80 95%CI 0.31-2.01, p = 0.63), local disease (OR 1.60 95%CI 0.75-3.42, p = 0.22), locoregional failure (OR 0.85 95%CI 0.20-3.66, p = 0.83) and distant recurrence (OR 0.76 95%CI 0.37-1.55, p = 0.45). Studies directly comparing WW and LE are still lacking, even though no differences between WW and LE in terms of rectum-preservation, local control, and distant recurrences have been found.

Gastrointestinal Stromal Tumours (GIST) of the Rectum: A Systematic Review and Meta-Analysis.

Rectal gastrointestinal stromal tumours (GISTs) have many treatment options, but uncertainty remains regarding the best treatment regimen for this rare pathology. The aim of this review is to assess the optimal management approach including timing of chemotherapy. PubMed, EMBASE, and Cochrane databases were searched for relevant articles comparing the impact of radical vs. local excision, and neoadjuvant vs. adjuvant therapy had on outcomes in the management of rectal GISTs. We specifically evaluated the influence that the aforementioned factors had on margins, recurrence, overall survival, 5-year disease-free survival, and hospital length of stay. Twenty-eight studies met our predefined criteria and were included in our study, twelve of which were included in the quantitative synthesis. When comparing neoadjuvant versus adjuvant chemotherapy, our meta-analysis noted no significance in terms of margin negativity (R0) (odds ratio [OR] 2.01, 95% confidence interval [CI], 0.7-5.79, p = 0.20) or recurrence rates (OR 0.22, 95% CI, 0.02-1.91, p = 0.17). However, there was a difference in overall 5-year survival in favour of neoadjuvant therapy (OR 3.19, 95% CI, 1.37-7.40, * p = 0.007). Comparing local excision versus radical excision, our meta-analysis observed no significance in terms of overall 5-year survival (OR1.31, 95% CI, 0.81-2.12, p = 0.26), recurrence (OR 0.67, 95% CI, 0.40-1.13, p = 0.12), or 5-year disease-free survival (OR 1.10, 95% CI, 0.55-2.19, p = 0.80). There was a difference in length of hospital stay with a reduced mean length of stay in local excision group (mean difference [MD] 6.74 days less in the LE group; 95% CI, -6.92--6.56, * p =&lt; 0.00001) as well as a difference in R0 rates in favour of radical resection (OR 0.68, 95% CI, 0.47-0.99, * p = 0.05). Neoadjuvant chemotherapy is associated with improved overall 5-year survival, while local excision is associated with reduced mean length of hospital stay. Further large-volume, prospective studies are required to further define the optimal treatment regimen in this complex pathology.

Abstract 14723: A Rare Case of Constrictive Pericarditis: Inflammatory Myofibroblastic Tumor

Case Presentation: A 14-year-old female presented with a 3-week history of lower extremity edema, abdominal distension, fatigue, and dyspnea on exertion. Her examination was notable for an elevated jugular venous pulse, abdominal distension with hepatomegaly, and 2+ pitting edema in the bilateral lower extremities. Laboratory findings were within normal limits. EKG showed low-amplitude QRS and echocardiogram confirmed bi-atrial enlargement, a dilated and non-compressible IVC, dyskinetic interventricular septum, and elevated right atrial pressures. Chest computed tomography demonstrated mediastinal mass with findings of a 6.2 x 4-centimeter mass in the pre-vascular space, diffuse necrotic mediastinal lymphadenopathy, and constrictive pericarditis with associated congestive hepatopathy. Cardiac magnetic resonance imaging revealed significant enhancement in T2 STIR with severe circumferential delayed enhancement, diastolic bounce, and respirophasic shift. A right heart catheterization was pursued which revealed elevated filling pressures but preserved cardiac index. The patient underwent video-assisted thoracoscopic biopsy of the mass with an initial histologic diagnosis of inflammatory myofibroblastic tumor (IMT). She underwent radical pericardiectomy for symptom resolution. Discussion: IMT is composed of spindle cells mixed with infiltrates of varying numbers of inflammatory cells. Although IMT can present in any age group, most patients who develop IMT are in adolescence. IMT is incredibly rare and its etiology still remains unclear. It remains difficult to distinguish IMT from a malignant tumor on the basis of imaging. As a result, in most cases, a definitive diagnosis is made based on the histopathological findings from either a resected tumor or a needle biopsy. Management of IMTs presents a challenge as treatment protocols have not clearly been established; radical local excision of the tumor is the mainstay of treatment.

Optimal surgical management strategy for treatment of primary anorectal malignant melanoma-a systematic review and meta-analysis.

Primary mucosal anorectal malignant melanoma (AMM) is an invasive malignancy with poor survival. Management options have been variable, due to limited data and lack of randomised control trials available on the optimal surgical strategy. The aim of this review was to compare local excision versus radical resection. A systematic searchof articles in PubMed, Ovid, Scopus, and the Cochrane Library database was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines.The outcomes of interest were the impact that surgical strategy had on survival (primary) and recurrence rates (secondary) for the treatment of AMM, comparing sphincter sparing local excision (LE) versus extensive abdominoperineal resection (APR). Ten studies met the predefined criteria. Overall, there were 303 patients, with a median age of 58.2years. Sixty-one percent (n = 187/303) had radical surgery (abdominoperineal resection) for the primary treatment of AMM. Overall, 5-year survival for the APR and LE was 23% and 32% respectively. Meta-analysis on the median OS noted no statistical difference between the two groups. However, local recurrence occurred in 20.82% and 47.04% in the APR and LE groups respectively. Meta-analysis observed a statistically significant reduction in recurrence when patients had an APR as primary treatment (OR 0.15, 95% CI = 0.08-0.28, p < 0.00001). Though local recurrence rates are more common with local excision of AMM, this does not confer an inferior OS when comparing LE versus APR. The decision to proceed with LE vs. APR should be made on a case-by-case basis.

Perforator flaps for vulvar reconstruction: basic principles.

In vulvar cancer, the standard treatment is radical local excision, with immediate reconstruction. Reconstruction aims to restore anatomy and function of the external female genitalia, facilitating preservation of normal body image, sexual function, and micturition and defecation functions. The purpose of this paper is to describe the principles of perforator flaps for vulvar reconstruction. Basic concepts, indications and operative technique are discussed and detailed. In vulvar reconstruction, the use of perforator flaps is a superior surgical technique when compared to the use of conventional flaps.

825 Local Excision Versus Total Mesorectal Excision Following Neoadjuvant Chemoradiotherapy for Rectal Cancer. a Systematic Review and Meta-Analysis

Abstract Aim Total mesorectal excision with or without neoadjuvant chemoradiotherapy remains the gold standard treatment for rectal cancer. This systematic review aims to establish if Local Excision (LE) in conjunction with neoadjuvant therapy can be used to improve morbidity and functional outcomes without significantly impacting oncological outcomes. Method A systematic review and meta-analysis was performed using the PRISMA guidelines. All studies comparing neoadjuvant chemoradiotherapy and local excision versus TME were included from 2000 to 2020. Primary endpoint included local recurrence rates. Secondary outcomes included distant recurrence, disease free survival and overall survival. Subgroup analysis was performed on randomised control trials (RCT). Results Of the 9 studies included, 2 were RCTs. A total of 1161 patients underwent neoadjuvant chemoradiotherapy and surgical excision (LE n=252, TME n=909). Local recurrence was 10% in the LE group compared to 7% in the TME group (OR 0.60, 95% CI 0.33–1.09, p=0.09). Furthermore, there was no significant difference in distant metastasis (OR 1.37, 95% CI 0.84–2.26, p=0.21), Disease Free Survival (DFS) (OR 1.08, 95% CI 0.65–1.82, p=0.76) or Overall Survival (OS) (OR 1.14, 95% CI 0.56–2.35, p=0.71). In subgroup analysis of RCTs, local recurrence rates of 7.2% were seen in the LE group compared to 6.6% in the TME group (OR 0.90, 95% CI 0.34–2.43, p=0.84). Conclusions Neoadjuvant chemoradiotherapy and local excision is oncologically safe in select patients. A higher non-significant local recurrence rate was seen in the LE group; however, this may be due to heterogeneity in patient selection. Similar local recurrences and oncological outcomes were verified in the RCTs.

Comparative study of topical 5-aminolevulinic acid photodynamic therapy (5-ALA-PDT) and surgery for the treatment of high-grade vaginal intraepithelial neoplasia

ObjectiveTo compare the clinical efficacy and safety of 5-aminolevulinic acid photodynamic therapy (ALA-PDT) and local surgical excision in the treatment of high-grade vaginal intraepithelial neoplasia (VAIN). MethodsThis was a retrospective study of a single center. Patients with biopsy-proven high-grade VAIN were counseled on the option of excision or ALA-PDT. After treatment patients were followed up at 3, 6 and 12 months and every 6 months afterwards. Clinical data of two groups were analyzed. ResultsSixty patients were treated with ALA-PDT and 40 patients underwent excision surgery. The clinical characteristics of patients in the two groups were similar. The mean ages of patients treated with ALA-PDT and local surgical excision were 41.93+13.08 (18-70) and 43.25+11.64 (22–61) years old, respectively. The treatment times of PDT for patients in the ALA-PDT group were 5.48±1.41 (2-8) times. At 3–6 months after treatment, the overall complete remission (CR) rate was 93.33% (56/60) in PDT group and 82.5% (33/40) in local surgical excision group. In PDT group, a 12- and 24-month follow-up, the total HPV clearance rate was 68.97% and 77.55%, respectively. At 12-month and 2-year follow-up after local surgical excision, the total HPV clearance rate was 60% and 64.52%, respectively. Further analysis showed that the clinical efficacy was comparable between the two treatments. Patients over 45 years old exhibited a lower HPV clearance rate (P<0.05) than those under 45 years old. It was also observed that persistent HPV infection is a major risk factor for persistent disease. Further comparative analyses showed no significant difference in the CR rate and treatment times between VAINII and VAINIII in ALA-PDT group. Moreover, 4 patients (11.36%) developed recurrent lesions during follow-up after ALA-PDT, whereas 3 patients (8.33%) in the local excision group developed recurrent lesions. In addition, there was no significant difference in the recurrent rate between two groups. ConclusionsALA-PDT shows similar efficacy and less side effects compared to local surgical excision.