Franco Roviello

Background: Segmental arterial mediolysis (SAM) is a rare, non-inflammatory, non-atherosclerotic, non-hereditary arteriopathy of unknown etiology that typically affects medium-sized visceral arteries. The absence of reliable diagnostic criteria poses a significant challenge. Consequently, the diagnosis of SAM should be considered in the setting of a distinctive combination of clinical features, angiographic findings, and histopathology. Renal artery involvement is uncommon, and its occurrence in the donor graft during kidney transplantation (KT) has not previously been reported. Case presentation: We report the case of a kidney graft from a deceased donor in her seventh decade of life, transplanted into a recipient in her seventh decade of life. Donor–recipient ABO compatibility was confirmed, and both complement-dependent cytotoxicity crossmatch and flow cytometry crossmatch were negative. Cold ischemia time was 14 h, and warm ischemia time was 20 min. Immediately after declamping, massive thrombosis of the graft renal artery was observed and confirmed using an intraoperative flowmeter. The arterial anastomosis was taken down, the thrombus was removed, the artery was flushed with heparin, and the anastomosis was reconstructed using interrupted sutures. Despite revision, no arterial flow was detected, and the graft was deemed unsalvageable and explanted. Histopathological examination showed thinning of the tunica media, reduced smooth muscle cells on desmin staining, medial-adventitial dissection, and occlusive thrombosis, findings considered likely attributable to SAM. Conclusions: This case suggests that occult donor arterial wall disease compatible with SAM may present catastrophically during KT and may lead to immediate graft loss despite standard surgical salvage attempts. Although no validated strategy currently exists to screen for or prevent occult SAM in asymptomatic donors, awareness of this entity may assist transplant surgeons and pathologists in the evaluation of unexplained early graft arterial thrombosis, donor-graft vascular pathology, and communication with centres receiving paired organs from the same donor.

Background: Indocyanine green (ICG)-guided surgery is an emerging technique to enhance intraoperative visualization of nodes and tumor location. However, there is no uniform protocol regarding the optimal timing, dosage, or injection site for ICG in colorectal cancer surgery. We assess the feasibility of ICG injection at the anorectal junction immediately before surgery to safely identify the inferior mesenteric artery (IMA). Methods: This was a prospective study involving robotic left hemicolectomy or anterior resection of the rectum for primary colorectal cancer in 2024 in a single center. A total of 10–20 mg was injected into the anorectal submucosa at four quadrants circumferentially using an anoscope immediately before robot docking. Results: In this first study, ICG allowed us to identify the IMA in 84.6% of 26 patients (mean age 66.5 years; BMI 26.7 kg/m²), without intraoperative medical and surgical complications. Elevated BMI correlated with failure of IMA detection (r = −0.77, p < 0.001), despite high ICG doses trending toward improved vascular visualization (p = 0.097). A mean of 22 lymph nodes was harvested after ICG injection, with yields unaffected by the quality of IMA visualization. Conclusions: Submucosal injection of ICG is a feasible and easily adoptable option for early identification of the IMA, thereby preventing major vascular injuries, particularly in patients with challenging anatomy. A standardized protocol was implemented to improve reliability.

Background: Surgical resection remains central to the curative treatment of locally advanced gastric cancer (GC), yet global variability persists in defining resectability, particularly in complex scenarios such as multivisceral invasion, positive peritoneal cytology (CY1), or oligometastatic disease. The Intercontinental Criteria of Resectability for Gastric Cancer (ICRGC) project was developed to address this gap by combining expert surgical input with artificial intelligence (AI)-based reasoning. Methods: A two-stage prospective survey was conducted during the 2024 European Gastric Cancer Association (EGCA) meeting. Fifty-eight surgical oncologists completed a 36-item questionnaire on resectability, strategy, and quality metrics. Subsequently, they reviewed AI-generated responses based on current clinical guidelines and completed a second round. Concordance between human and AI responses was classified as full, partial, or discordant, and changes in surgeon opinions were statistically analyzed. Results: Substantial agreement was observed in evidence-based domains. Seventy-nine percent of surgeons agreed with AI on distinguishing technical from oncological resectability. In cT4b cases, 61% supported restricting multivisceral resection to high-volume centers. Similar alignment was found in CY1 (54%) and N3 nodal disease (63%). Partial concordance appeared in areas requiring individualized judgment, such as peritonectomy or bulky-N disease. After AI exposure, surgeon responses shifted toward guideline-consistent decisions, including increased support for cytoreductive surgery only when CC0/1 was achievable and stricter classification of R2 resections as unresectable. Following AI exposure, 27.1% of surgeons changed at least one answer in alignment with AI recommendations, with statistically significant shifts observed in items related to surgical margin definition (p = 0.015), anatomical resection criteria (p < 0.05), and hospital stay benchmarks (p = 0.031). Conclusions: The ICRGC study demonstrates that AI-driven consensus modeling can replicate expert reasoning in complex surgical oncology and serve as a catalyst for harmonizing global practice. These findings suggest that AI-supported consensus modeling may complement expert surgical reasoning and promote greater consistency in decision-making, particularly in controversial or ambiguous cases.

Cystic mucinous neoplasms (MCNs) of the pancreas are rare cystic tumors, accounting for approximately 2–5% of all pancreatic neoplasms. They predominantly occur in premenopausal women and are typically located in the body or tail of the pancreas. Due to their potential for malignant transformation, especially in cases associated with invasive carcinoma such as pancreatic ductal adenocarcinoma, early detection, complete surgical resection, and rigorous postoperative surveillance are essential. The occurrence of MCNs in male patients is exceedingly rare, comprising only about 2% of reported cases, and often resulting in preoperative diagnostic challenges. Molecular analyses have identified a strong association between KRAS mutations and disease progression in MCNs, underscoring their potential role as prognostic markers despite limited diagnostic utility. In this report, we present two additional cases of MCNs in male patients, highlighting their histopathological features and the ancillary investigations undertaken to support diagnosis.

Background: PIPAC is an innovative treatment that delivers low-dose aerosolized chemotherapy into the abdominal cavity of patients with peritoneal surface malignancies (PSMs). However, its role in the multimodal management of PSMs is unclear. Methods: We retrospectively analyzed data from 64 patients who underwent PIPAC for PSMs of a primary or secondary origin between June 2020 and December 2024 (median age of 64 years). Primary tumor sites included gastric (42.2%), colorectal (23.4%), ovarian cancer (21.9%), and others (12.5%). The median PCI was 15 (IQR 9–25), with ascites present in 60.9% of cases and a positive cytology in 48.4%. Results: A total of 82 PIPAC sessions were performed in 64 patients. The mean operation time was 96 min. Severe adverse events, defined as the Common Terminology Criteria for Adverse Events (CTCAE) of a grade ≥ 2, occurred in four patients (6.2%). The median hospital stay was 3 days, and systemic chemotherapy was resumed within 14 days after the procedure in 27 patients. Among the entire cohort, 37.5% received bidirectional therapy and 62.5% received palliative treatment, with a lower peritoneal cancer index (PCI) in the bidirectional group (9.5 vs. 23). The median overall survival (OS) was 32 months from diagnosis. Sixteen patients (25%) underwent two or more PIPAC sessions and showed an advantage in survival compared to patients who underwent only one procedure (3-year OS: 63.2% vs. 38.4%, p 0.030). Conversion surgery was achieved in 34.4%. Patients treated with a bidirectional intent demonstrated a longer OS (3-year: 66.0% vs. 33.9%, p 0.011). Colorectal and ovarian tumors exhibited better long-term outcomes compared to gastric cancer. Conclusions: PIPAC is a promising treatment for PSMs, with a low morbidity rate. Its favorable safety and short interval to systemic therapy resumption support its use as part of a bidirectional strategy.

Background and Objectives: Hepatolithiasis (HL), or intrahepatic bile duct stone disease, shows regional variation and is a rare condition in Western countries. While cases from East Asia are often linked to chronic biliary infections and brown pigment stones, Western HL more frequently involves cholesterol or black pigment stones, typically in the context of prior cholecystectomy, biliary interventions, or congenital anomalies. The disease is generally associated with significant morbidity, including recurrent cholangitis, biliary strictures, and risk of cholangiocarcinoma. This study aimed to characterize HL disease in an Italian case series. Materials and Methods: We retrospectively reviewed 1450 patients with biliary stone disease treated between 2010 and 2024. HL was diagnosed in 14 patients (0.96%). Clinical records, imaging (ultrasound, CT, magnetic resonance cholangiopancreatography—MRCP, cholangiography), bile cultures, and stone composition (categorized as cholesterol, brown pigment, black pigment, or mixed using FTIR/XRD) were analyzed. Results: Among the 14 patients (mean age: 60.1 years; 64.3% female), 71.4% presented with recurrent cholangitis, while 28.6% were asymptomatic. Stones were left-sided in 57.1%, right-sided in 21.4%, and bilateral in 21.4%. Stone composition was cholesterol/mixed in 50%, brown pigment in 35.7%, and black pigment in 14.3%. Risk factors for bile stasis were present in 71.4% of cases. Bile cultures (available in nine cases) were positive in 77.8%. MRCP was highly effective for diagnosis. Hepatectomy achieved complete resolution in 35.7% of patients with unilobar disease; endoscopic/percutaneous therapy had a 44.4% recurrence rate. Interestingly, no cholangiocarcinoma was observed over a median follow-up of 4.8 years. Conclusions: Western HL is a rare, heterogeneous disease with distinct features. Cholesterol-predominant, infection-negative cases suggest a metabolic or surgical etiology. Hepatectomy offers durable outcomes in unilobar disease. Advanced imaging (MRCP, cholangioscopy) and personalized strategies are key to effective management.

Background: Anal HPV infection can cause squamous intraepithelial lesions (SILs), which are precursors of anal squamous cell carcinoma (SCC). The early detection of HPV infections and improvement of effective screening programmes are, therefore, essential to prevent progression from pre-cancerous lesions to SCC, especially in people living with HIV (PLWH), who represent a population at higher risk of HPV infection and associated lesions. Among prevention strategies, HPV vaccination is relevant too, but its efficacy in persons already infected by HPV is still debated. Methods: This is a retrospective single-center study on a cohort of PLWH who performed longitudinal screening for anal dysplasia and HPV infection. The screening included cytological and molecular analyses. Results: A total of 110 PLWH performed at least one anal HPV screening, with an overall prevalence of HPV infection of 86.4% [23.6% low risk (LR)-HPV and 62.7% high risk (HR)-HPV genotypes]. Abnormal cytology was demonstrated in 39.1% of subjects, of whom ASCUS 6.4%, LSIL 30.9% and HSIL 1.8%. In total, 80 patients (72.7%) had an available longitudinal screening. No patient developed SCC during follow-up. However, a high incidence of new cytological abnormalities and new HPV infections was observed. On the other side, clearance of some HPV genotypes was also frequent, confirming that HPV infection is a dynamic process. A CD4 cell count > 500/mmc was an independent predictor of HPV clearance. HPV vaccination was performed on 30.9% of patients. A trend toward an increased clearance of HPV genotypes included in 9-valent vaccine was observed in vaccinated patients (40.6% versus 30.8% in unvaccinated, p = 0.079). Conclusions: A high prevalence of HPV infection and SILs was observed in our cohort of PLWH. A high incidence of new HPV infections and HPV-associated lesions was also observed in the longitudinal cohort, highlighting the need of strengthening immunization programs and continuous screening for anal HPV infection. Whether HPV vaccination may be efficacious in patients already infected by HPV remains to be determined.

Background/Objectives: The textbook outcome (TO) is a composite tool introduced to uniform surgical units and regulate surgical quality and outcomes. A patient is considered TO only if all predetermined items are met. In colorectal surgery, TO represents a new tool that can achieve important results given the prevalence of colorectal cancers. However, at present, there is a lack of uniformity in the TO’s definition. This study utilized the Delphi process to define an Italian version of the TO in colorectal cancer. Methods: The survey consisted of two rounds of online questionnaires submitted to an expert panel in colorectal oncological surgery, renowned academic surgeons, who had attended multiple scientific conferences and who were authors of papers on this specific topic. Five main topics with 26 questions were investigated through an online modified Delphi method. Items with almost 75% agreement achieved consensus. Results: Twenty-eight Italian experts were selected and participated in the two rounds. The Italian version of the textbook outcome in colorectal surgery was defined as the presence of 90-day postoperative survival, negative margins and at least 12 lymph nodes, a minimally invasive approach, ostomy fashioning if preoperatively planned, postoperative complication < Clavien–Dindo 3b, at least 10 ERAS items, no readmission, proper CHT and RT regimens, complete colonoscopy after or before surgery and Tumor Board Evaluation. Conclusions: The textbook outcome in colorectal cancer patients is a quality instrument providing a complete overview of the care of such patients, from diagnosis to treatment. We hereby propose an Italian version of the TO with outcomes chosen by an expert panel.

Background: Long-term outcomes in patients undergoing emergency versus elective resection for colorectal cancer (CRC) remain controversial. This study aims to assess short- and long-term outcomes of emergency versus elective CRC surgery. Methods: In this single-center retrospective cohort study, patients undergoing emergency or elective colonic resections for CRC from January 2013 to December 2017 were included. Primary outcome was long-term survival. As secondary outcomes, we sought to analyze potential differences on postoperative morbidity and concerning the oncological standard of surgical resection. The Kaplan-Meier curves and Cox proportional hazard model were used to compare survival between the groups. Results: Overall, 225 CRC patients were included. Of these 192 (85.3%) had an elective and 33 (14.7%) an emergency operation. Emergency indications were due to obstruction, perforation, or bleeding. Patients in the emergency group had higher ASA score (p = 0.023), higher Charlsson comorbidity index (CCI, p = 0.012), and were older than those in the elective group, with median age 70 (IQR 63–79) years and 78 (IQR 68–83) years, for elective and emergency, respectively (p = 0.020). No other preoperative differences were observed. Patients in the emergency group experienced significantly more major complications (12.1% vs. 3.6%, p = 0.037), more anastomotic leakage (12.1% vs. 1.6%, p = 0.001), need for reoperation (12.1% vs. 3.1%, p = 0.021), and postoperative mortality (2 patients vs. 0, p < 0.001). No differences in terms of final pathological stage, nor in accuracy of lymphadenectomy were observed. Overall survival was significantly worse in case of emergency operation, with estimated median 41 months vs. not reached in elective cases (p < 0.001). At the multivariate analysis, emergency operation was confirmed as independent unfavorable determinant of survival (with hazard rate HR = 1.97, p = 0.028), together with age (HR = 1.05, p < 0.001), postoperative major morbidity (HR = 3.18, p = 0.012), advanced stage (HR = 5.85, p < 0.001), and need for transfusion (HR = 2.10, p = 0.049). Conclusion: Postoperative morbidity and mortality were increased in emergency versus elective CRC resections. Despite no significant differences in terms of accuracy of resection and pathological stages, overall survival was significantly worse in patients who underwent emergency procedure, and independent of other determinants of survival.

Background: Despite the strong declining trends in incidence and mortality over the last decades, gastric cancer (GC) is still burdened with high mortality, even in high-income countries. To improve GC prognosis, several guidelines have been increasingly published with indications about the most appropriate GC management. The Italian Society of Digestive System Pathology (SIPAD) and Gastric Cancer Italian Research Group (GIRCG) designed a survey for both surgeons and patients with the purpose of evaluating the degree of application and adherence to guidelines in GC management in Italy. Materials and Methods: Between January and May 2022, a questionnaire has been administered to a sample of Italian surgeons and, in a simplified version, to members of the Patient Association “Vivere Senza Stomaco” (patients surgically treated for GC between 2008 and 2021) to investigate the diagnosis, staging, and treatment issues. Results: The survey has been completed by 125 surgeons and 125 patients. Abdominal CT with gastric hydro-distension before treatment was not widespread in both groups (47% and 42%, respectively). The rate of surgeons stating that they do not usually perform minimally invasive gastrectomy was 15%, but the rate of patients who underwent a minimally invasive approach was 22% (between 2011 and 2022). The percentage of surgeons declaring to perform extended lymphadenectomy (>D2) was 97%, although a limited lymph node dissection rate was observed in about 35% of patients. Conclusions: This survey shows several important discrepancies from surgical attitudes declared by surgeons and real data derived from the reports available to the patients, suggesting heterogeneous management in clinical practice and, thus, a not rigorous adherence to the guidelines.