Angelo Alessandro Marra has a total of 42 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Ventral Mesh Rectopexy and Rectal Cancer: An Underrecognized Concern

    by Carlo Ratto, Nurhilal Kiziltoprak, Angelo Alessandro Marra

    Was not provided for this article.

  • Open Access

    A Low-Cost, Do-It-Yourself Laparoscopic Simulator for Basic Surgery Training: Design, Assembly, and Pilot Validation

    by Mario Pagano, Angelo Parello, Francesco Litta, Angelo Alessandro Marra, Paola Campennì, Claudia Varrella, Cesare Caruso, Carlo Ratto

    Background: Simulation-based laparoscopic training increasingly relies on portable, low-cost platforms that support home-based practice, but detailed descriptions of reproducible, do-it-yourself (DIY) trainers and their educational potential remain limited. Methods: We updated a low-budget laparoscopic simulator constructed from an inexpensive plastic container, wood components, a low-cost webcam, and plywood task pads modeled on Fundamentals of Laparoscopic Surgery (FLS) exercises. We then conducted informal qualitative usability testing in which 10 residents and 5 fellows from general surgery, gynecology, and urology used the simulator at home for one week and completed an eight-item feedback form plus free-text comments on assembly, ergonomics, realism, and educational value. Results: All participants successfully assembled and used the simulator; most described set-up as easy or intuitive, reported adequate image quality and lighting, and considered the platform useful for practicing depth perception, bimanual coordination, and cutting and suturing tasks. Feedback emphasized low cost, portability, and cross-specialty applicability, with only minor suggestions such as adjustable camera height or increased base weight. Conclusions: This DIY laparoscopic simulator could be assembled and used in a home-based setting, and trainees reported favorable usability and perceived educational value. More structured validation studies addressing face, content, and construct validity are needed to define its potential role within contemporary surgical curricula.


  • Open Access

    Endoanal Ultrasound in Perianal Crohn’s Disease

    by Mario Pagano, Francesco Litta, Angelo Parello, Angelo Alessandro Marra, Paola Campennì, Carlo Ratto

    Background: Perianal Crohn’s disease (pCD) is one of the most disabling complications of inflammatory bowel disease, characterized by fistulas and abscesses that demand precise imaging for diagnosis, treatment planning, and follow-up. Magnetic resonance imaging (MRI) is considered the reference standard, but endoanal ultrasound (EAUS) with high-frequency 360° probes provide a readily available, cost-effective, and repeatable alternative. Methods: We performed a narrative review of the literature, evaluating studies on the EAUS technique, diagnostic applications, distinguishing features of Crohn’s-related fistulas, and comparative analyses with MRI. Consensus documents and structured reporting initiatives were also included. Results: EAUS provides high-resolution visualization of the anal sphincter complex and intersphincteric space, enabling the reliable detection of fistulas and abscesses. Characteristic features such as tract width > 4 mm, bifurcation, hyperechoic debris, the Crohn’s Ultrasound Fistula Sign (CUFS), and the rosary sign assist in differentiating Crohn’s from cryptoglandular fistulas. EAUS is well-suited for serial monitoring, perioperative seton guidance, and therapeutic decision-making. Emerging tools such as Doppler and shear wave elastography provide additional information on activity and fibrosis. MRI remains indispensable for supralevator disease, deep pelvic sepsis, and standardized activity indices. Comparative studies indicate similar sensitivity for simple fistulas, with MRI superior in complex cases; combining both modalities maximizes accuracy. Conclusions: EAUS is a practical and repeatable imaging tool that complements MRI in the multidisciplinary management of perianal Crohn’s disease. Advances such as 3D imaging, contrast enhancement, and elastography may enable validated activity scoring—for example, a future PEACE (Perianal Endosonographic Activity in Chron’s Evaluation) Index—further strengthening its role in longitudinal care.


  • Open Access

    Timing and Modality of Hemorrhoidal Prolapse Impact on Patients’ Quality of Life

    by Carlo Ratto, Angelo Parello, Angelo Alessandro Marra, Paola Campennì, Veronica De Simone, Francesco Litta

    Background: The aim of this study was to assess whether the frequency and presentation modality of hemorrhoidal prolapse may have an impact on patients’ quality of life, leading to a different categorization of patients. Methods: A consecutive series of patients affected by primary hemorrhoidal disease were administered specific questionnaires to assess the severity of symptoms and their quality of life. The frequency/modality of prolapse was also assessed, and the classification of the patients into five categories was hypothesized. The severity of disease was assessed using a validated patient-reported score, while the health-related quality of life was evaluated with the Short Health Scale for hemorrhoidal disease. Results: A total of 122 patients were enrolled. The evaluation of the prolapse modality led to the following classification: type I, 5 patients (4.1%); type II, 9 (7.4%), type IIIa, 48 (39.3%); type IIIb, 52 (42.6%); and type IV, 8 (6.6%). The mean total hemorrhoidal disease score was 9.8 ± 3.3, while the mean total Short Health Scale score was 18.6 ± 5.2. Both scores progressively increased in the five types of prolapse identified, thus showing a worsening of symptoms and quality of life related to the increase in the frequency and modality of prolapse. The assessment of the quality of life showed that all four domains of the Short Health Scale score and the total score were significantly worse in group IIIb compared to IIIa. Conclusions: The frequency and modality of hemorrhoidal prolapse has an impact on the quality of life and allows the identification of new types of patients.


  • Analysis of factors that indicated surgery in 400 patients submitted to a complete diagnostic workup for obstructed defecation syndrome and rectal prolapse using a supervised machine learning algorithm

    by A. A. Marra, I. Simonelli, A. Parello, F. Litta, V. De Simone, P. Campennì, C. Ratto

    Background Patient selection is extremely important in obstructed defecation syndrome (ODS) and rectal prolapse (RP) surgery. This study assessed factors that guided the indications for ODS and RP surgery and their specific role in our decision-making process using a machine learning approach. Methods This is a retrospective analysis of a long-term prospective observational study on female patients reporting symptoms of ODS who underwent a complete diagnostic workup from January 2010 to December 2021 at an academic tertiary referral center. Clinical, defecographic, and other functional tests data were assessed. A supervised machine learning algorithm using a classification tree model was performed and tested. Results A total of 400 patients were included. The factors associated with a significantly higher probability of undergoing surgery were follows: as symptoms, perineal splinting, anal or vaginal self-digitations, sensation of external RP, episodes of fecal incontinence and soiling; as physical examination features, evidence of internal and external RP, rectocele, enterocele, or anterior/middle pelvic organs prolapse; as defecographic findings, intra-anal and external RP, rectocele, incomplete rectocele emptying, enterocele, cystocele, and colpo-hysterocele. Surgery was less indicated in patients with dyssynergia, severe anxiety and depression. All these factors were included in a supervised machine learning algorithm. The model showed high accuracy on the test dataset (79%, p < 0.001). Conclusions Symptoms assessment and physical examination proved to be fundamental, but other functional tests should also be considered. By adopting a machine learning model in further ODS and RP centers, indications for surgery could be more easily and reliably identified and shared.


  • Open Access

    Technical modifications for cost optimization in robot-assisted ventral mesh rectopexy: an initial experience

    by A. A. Marra, P. Campennì, V. De Simone, A. Parello, F. Litta, C. Ratto

    Background: Robot-assisted ventral mesh rectopexy is considered a valid option in the treatment of rectal prolapse. However, it involves higher costs than the laparoscopic approach. The aim of this study is to determine if less expensive robotic surgery for rectal prolapse can be safely performed. Methods: This study was conducted on consecutive patients who underwent robot-assisted ventral mesh rectopexy at Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Rome, from 7 November 2020 to 22 November 2021. The cost of hospitalization, surgical procedure, robotic materials, and operating room resources in patients undergoing robot-assisted ventral mesh rectopexy with the da Vinci Xi Surgical Systems was analyzed before and after technical modifications, including the reduction of robotic arms and instruments, and the execution of a double minimal peritoneal incision at the pouch of Douglas and sacral promontory (instead of the traditional inverted J incision). Results: Twenty-two robot-assisted ventral mesh rectopexies were performed [21 females, 95.5%, median age 62.0 (54.8–70.0) years]. After an initial experience performing traditional robot-assisted ventral mesh rectopexy in four patients, we adopted technical modifications in other cases. No major complication or conversion to open surgery occurred. In total, mean cost of hospitalization, surgical procedure, robotic materials, and operating room resources was €6995.5 ± 1058.0, €5912.7 ± 877.0, €2797.6 ± 545.6, and €2608.3 ± 351.5, respectively. Technical modifications allowed a significant reduction in the overall cost of hospitalization (€6604.5 ± 589.5 versus €8755.0 ± 906.4, p = 0.001), number of robotic instruments (3.1 ± 0.2 versus 4.0 ± 0.8 units, p = 0.026), and operating room time (201 ± 26 versus 253 ± 16 min, p = 0.003). Conclusions: Considering our preliminary results, robot-assisted ventral mesh rectopexy with appropriate technical modifications can be cost-effective and safe.


  • Open Access

    Would Surgeons Like to Be Submitted to Anal Fistulotomy? An International Web-Based Survey

    by Carlo Ratto, Angelo Alessandro Marra, Angelo Parello, Veronica De Simone, Paola Campennì, Francesco Litta

    Traditional fistulotomy is the most performed surgical procedure in anal fistula surgery. We conducted an international online survey to explore colorectal surgeons’ opinions and preferences on fistulotomy. Considering the healing and continence impairment rates reported in the literature, surgeons were invited to answer as a hypothetic patient susceptible to being submitted to fistulotomy for low and high anal fistula. A total of 767 surgeons completed the survey from 72 countries. The majority of respondents were consultants, having treated more than 20 anal fistulas in the last year. Most of them declared that anal fistula would be able to negatively affect quality of life and would be worried/anxious about it. Taking into account all aspects, 87.5% and 37.8% of respondents would agree to be treated with a fistulotomy in case of a low and high fistula, respectively, with an acceptance rate that varied worldwide. At multivariate analysis, factors correlated to the acceptance of anal fistulotomy were male gender (p = 0.003), practice of less than 20 fistula operations during last year (p = 0.020), and low fistula (p < 0.001). Surgeons recognized the extreme complexity of this approach. This study highlighted the necessity of an accurate patients’ selection and the adoption of alternative strategy to reduce the risk of anal continence impairment.


  • Open Access

    Tunneling of Mesh during Ventral Rectopexy: Technical Aspects and Long-Term Functional Results

    by Paola Campennì, Angelo Alessandro Marra, Veronica De Simone, Francesco Litta, Angelo Parello, Carlo Ratto

    Avoiding the extensive damage of pelvic structures during ventral rectopexy could minimize secondary disfunctions. The objective of our observational study is to assess the safety and functional efficacy of a modified ventral rectopexy. In the modified ventral rectopexy, a retroperitoneal tunnel was created along the right side of rectum, connecting two peritoneal mini-incisions at the Douglas pouch and sacral promontory. The proximal edge of a polypropylene mesh, sutured over the ventral rectum, was pulled up through the retroperitoneal tunnel and fixed to the sacral promontory. In all patients, radiopaque clips were placed on the mesh, making it radiographically “visible”. Before surgery and at follow up visits, Altomare, Longo, CCSS, PAC-SYM, and CCFI scores were collected. From March 2010 to September 2021, 117 patients underwent VR. Modified ventral rectopexy was performed in 65 patients, while the standard ventral rectopexy was performed in 52 patients. The open approach was used in 97 cases (55 and 42 patients in modified and standard VR, respectively), while MI surgery was used in 20 cases (10 and 10 patients in modified and standard VR, respectively). A slightly shorter operative time and hospital stay were observed following modified ventral rectopexy (though this was not statistically significant). Similar overall complication rates were registered in the modified vs. standard ventral rectopexies (4.6% vs. 5.8%, p = 0.779). At follow-up, the Longo score (14.0 ± 8.6 vs. 11.0 ± 8.2, p = 0.042) and “delta” values of Altomare (9.2 ± 6.1 vs. 5.9 ± 6.3, p = 0.008) and CCSS (8.4 ± 6.3 vs. 6.1 ± 6.1, p = 0.037) scores were significantly improved in the modified ventral rectopexy group. A similar occurrence of symptoms recurrence was diagnosed in the two groups. Radiopaque clips helped to accurately diagnose mesh detachment/dislocation. The proposed modified VR seems to be feasible and safe. Marking the mesh intraoperatively seems useful.


  • Open Access

    The Emborrhoid Technique for Treatment of Bleeding Hemorrhoids in Patients with High Surgical Risk

    by Paola Campennì, Roberto Iezzi, Angelo Alessandro Marra, Alessandro Posa, Angelo Parello, Francesco Litta, Veronica De Simone, Carlo Ratto

    The Emborrhoid is an innovative non-surgical technique for the treatment of severe hemorrhoidal bleeding. Patient selection and the impact on quality of life have not been fully investigated. This prospective observational study aims to evaluate the clinical outcomes after Emborrhoid in patients with high surgical risk. All patients with high surgical risk and anemia due to hemorrhoids were enrolled. Clinical data and previous blood transfusions were collected. The Hemorrhoidal Disease Symptom Score and Short Health Scala were completed before the procedure and during the follow-up visits at 1, 6 and 12 months. Transfusions and serum hemoglobin level variations were registered. Perioperative complications and the recurrence of bleeding were assessed. Trans-radial/femoral embolization of superior rectal artery, and/or middle rectal artery was performed with Interlock and Detachable Embolization Coils. From September 2020 to February 2022, 21 patients underwent a superselective embolization of all branches of the superior rectal artery. The transradial approach was most frequently performed compared to transfemoral access. After the procedure, no signs of ischemia were identified; three minor complications were observed. The mean follow-up was 18.5 ± 6.0 months. At the last follow-up, the mean increase of hemoglobin for patients was 1.2 ± 1.6 g/dL. Three patients needed transfusions during follow-up for recurrent hemorrhoidal bleeding. The Hemorrhoidal Disease Symptom Score and Short Health Scala decreased from 11.1 ± 4.2 to 4.7 ± 4.6 (p < 0.0001) and from 18.8 ± 4.8 to 10.2 ± 4.9 (p < 0.0001), respectively. Patients who had given up on their daily activities due to anemia have returned to their previous lifestyle. Emborrhoid seems to be a safe and effective option for the treatment of bleeding hemorrhoids in frail patients. The low complication rate and the significant reduction of post-defecation bleeding episodes are related to the improvement of the hemorrhoidal symptoms and patients’ quality of life.