Abdominal Wall & Hernia Surgery

Isolated rectus diastasis: core physiotherapy first (surgical plication only for refractory functional/cosmetic impairment). Umbilical/epigastric hernia with concomitant rectus diastasis (>2–3 cm inter-recti distance): combine linea alba plication with preperitoneal/retromuscular mesh reinforcement (eTEP, SCOLA, or Rives-Stoppa), after completion of planned pregnancies. Femoral, obturator, and Spigelian hernias: urgent laparo-endoscopic preperitoneal (TEP/TAPP) or preperitoneal mesh repair.

Before: Mesh repair of an isolated rectus diastasis without a true hernia defect, or simple suture repair of an umbilical hernia ignoring a wide (>2–3 cm) concomitant rectus diastasis.

Now: Isolated rectus diastasis: core physiotherapy first (surgical plication only for refractory functional/cosmetic impairment). Umbilical/epigastric hernia with concomitant rectus diastasis (>2–3 cm inter-recti distance): combine linea alba plication with preperitoneal/retromuscular mesh reinforcement (eTEP, SCOLA, or Rives-Stoppa), after completion of planned pregnancies. Femoral, obturator, and Spigelian hernias: urgent laparo-endoscopic preperitoneal (TEP/TAPP) or preperitoneal mesh repair.

Patients with isolated rectus abdominis diastasis, umbilical/epigastric hernia with concomitant diastasis, and non-inguinal groin/pelvic hernias (femoral, obturator, Spigelian), exactly as the addendum's summary row stratifies them.

Unaddressed rectus diastasis (>2 cm) increases midline umbilical hernia recurrence 3-to-4-fold; femoral and obturator hernias carry 30–45% strangulation rates requiring prompt preperitoneal mesh coverage. The midline-hernia combination repair is timed after completion of planned pregnancies, as printed.

• European Hernia Society (EHS) Rectus Diastasis Guidelines — as cited in the addendum summary table (no PMID printed)
• HerniaSurge 2023 Update (Stabilini et al.) — as cited in the addendum summary table (no PMID printed)

Evaluate each decision separately: (1) Plane: prefer retromuscular Rives-Stoppa placement where feasible for complex defects while retaining IPOM-plus for selected defects/patient factors; (2) Component separation: select TAR based on rectus-to-defect ratio, loss of domain, tissue compliance, and prior scarring rather than width alone; (3) Fascial closure: strive for tension-free midline closure (the §4.2 pathway specifies midline anterior and posterior fascial closure over the retromuscular space using a small-bite closure technique, STITCH); and (4) Material: in selected CDC Class II–III retromuscular repairs with fascial closure in experienced centers, mid-weight macroporous monofilament polypropylene mesh achieved lower 2-year recurrence than porcine dermal biologic mesh.

Before: Collapsing mesh plane, component separation, and mesh material into a single rigid rule (e.g., mandating TAR by a single defect-width number, declaring all IPOM repairs obsolete, or stating biologic mesh is universally contraindicated).

Now: Evaluate each decision separately: (1) Plane: prefer retromuscular Rives-Stoppa placement where feasible for complex defects while retaining IPOM-plus for selected defects/patient factors; (2) Component separation: select TAR based on rectus-to-defect ratio, loss of domain, tissue compliance, and prior scarring rather than width alone; (3) Fascial closure: strive for tension-free midline closure (the §4.2 pathway specifies midline anterior and posterior fascial closure over the retromuscular space using a small-bite closure technique, STITCH); and (4) Material: in selected CDC Class II–III retromuscular repairs with fascial closure in experienced centers, mid-weight macroporous monofilament polypropylene mesh achieved lower 2-year recurrence than porcine dermal biologic mesh.

Adults undergoing complex or clean-contaminated/contaminated (CDC Class II–III) ventral incisional hernia repair. Outcomes rated in the matrix: 2-year hernia recurrence and surgical site occurrences requiring intervention.

In Rosen et al. 2022 (n = 253, 5 specialized centers), mid-weight macroporous monofilament polypropylene mesh placed in the retromuscular space with complete fascial closure had lower 2-year recurrence than porcine dermal biologic mesh (5.6% vs. 20.5%; ARR −14.9%, 95% CI −23.8% to −6.1%; p = 0.001) with similar 2-year SSOs requiring intervention (OR 1.22, 95% CI 0.60–2.44; p = 0.58). TAR is added selectively when retrorectus dissection alone cannot achieve low-tension fascial closure (guided by Carbonell rectus-to-defect ratio <2.0 and loss of domain >15%–20%, rather than any rigid width cutoff). Do not extrapolate the Rosen trial to dirty/infected fields (CDC Class IV), uncontrolled intra-abdominal sepsis, bridged defects without fascial closure, intraperitoneal mesh placement, or microporous/multifilament synthetic meshes; conversely, do not state that biologic or biosynthetic meshes are universally contraindicated across all clinical scenarios (§4.0 Guardrail 2). Preoperative Botulinum Toxin A is a selective, institution-specific off-label adjunct for selected complex reconstructions with loss of domain, not a routine requirement: commercial formulations (OnabotulinumtoxinA [Botox], AbobotulinumtoxinA [Dysport], IncobotulinumtoxinA [Xeomin]) are NOT unit-interchangeable, and neuromuscular junction disorders (e.g., myasthenia gravis, Lambert-Eaton syndrome) are contraindications (§4.0 Guardrail 3).

Regional practice (§4.2 Saudi/GCC frame): for groin and ventral hernias, regional practice adapts international HerniaSurge and EHS/AHS guidelines while counseling women of childbearing age on pregnancy timing relative to elective mesh repair.

• Rosen et al., JAMA Surg 2022 (PMID 35044431)
• STITCH trial — small-bite closure (PMID 26188742)
• EHS / AHS Ventral & Incisional Hernia Guidelines — as cited in Table 4.1

Laparo-endoscopic preperitoneal mesh repair (TEP or TAPP) covering the entire myopectineal orifice (including the femoral canal) is preferred when the patient is fit for general anesthesia and laparo-endoscopic expertise/equipment are available; tailor to open preperitoneal or anterior repair when prior pelvic surgery, severe cardiopulmonary comorbidity, or local expertise dictates.

Before: Routine open anterior inguinal exploration without femoral canal evaluation in women, or presenting laparo-endoscopic repair as compulsory when patient fitness or expertise is lacking.

Now: Laparo-endoscopic preperitoneal mesh repair (TEP or TAPP) covering the entire myopectineal orifice (including the femoral canal) is preferred when the patient is fit for general anesthesia and laparo-endoscopic expertise/equipment are available; tailor to open preperitoneal or anterior repair when prior pelvic surgery, severe cardiopulmonary comorbidity, or local expertise dictates.

Women with primary groin hernia and adults with bilateral primary inguinal hernias. Outcomes rated in the matrix: hernia recurrence, missed femoral hernia prevention, and recovery.

National hernia registries (Swedish and Danish Hernia Databases, referenced in HerniaSurge) show that femoral hernias account for ~17%–27% of primary groin hernia repairs in women and that ~35%–40% of reoperations after prior open anterior inguinal repair in women reveal an overlooked femoral hernia. TEP/TAPP directly visualizes and covers the femoral canal, but patient fitness, anesthesia risk, prior lower abdominal surgery, and surgeon experience remain essential modifiers.

Regional practice (§4.2 Saudi/GCC frame): for groin and ventral hernias, regional practice adapts international HerniaSurge and EHS/AHS guidelines while counseling women of childbearing age on pregnancy timing relative to elective mesh repair.

• HerniaSurge International Guidelines for Groin Hernia Management, 2023 Update — Stabilini et al., BJS Open 2023 (PMID 37862616)

Flat preperitoneal or retromuscular polypropylene mesh reinforcement is generally favored for primary 1–4 cm adult umbilical hernias; individualize repair (including suture repair or deferred elective mesh repair) for defects <1 cm, contaminated fields, or women planning pregnancy. Note that application of the Kaufmann trial to epigastric hernias is an EHS/AHS guideline-based extrapolation.

Before: Routine primary suture repair for all 1–4 cm primary adult umbilical hernias, or extending mesh mandates uncritically to all <1 cm, contaminated, or pregnancy-planning cases.

Now: Flat preperitoneal or retromuscular polypropylene mesh reinforcement is generally favored for primary 1–4 cm adult umbilical hernias; individualize repair (including suture repair or deferred elective mesh repair) for defects <1 cm, contaminated fields, or women planning pregnancy. Note that application of the Kaufmann trial to epigastric hernias is an EHS/AHS guideline-based extrapolation.

Adults (>=18 y) with primary umbilical hernia, diameter 1–4 cm. Outcomes rated in the matrix: 24–30 month hernia recurrence and postoperative surgical site complications.

In Kaufmann et al. (n = 300 randomized; 146 mesh vs. 138 suture mITT; median follow-up 25.1 mo), 2-year actuarial recurrence was 3.6% (95% CI 1.4–9.4; 6/146 [4%]) with mesh vs. 11.4% (95% CI 6.8–18.9; 17/138 [12%]) with suture (HR 0.31, 95% CI 0.12–0.80; p = 0.01; NNT 12.8). Postoperative complication counts were low in both arms (seroma 3% [5/146] vs. <1% [1/138]; hematoma 2% [3/146] vs. 1% [2/138]; wound infection 2% [3/146] vs. <1% [1/138]) with no significant difference in chronic pain at 2 years, though low event numbers limit power to exclude small differences in local wound events. The trial studied primary 1–4 cm umbilical defects only — defects <1 cm, contaminated fields, and women planning future pregnancy require individualized shared decision-making (§4.0).

Regional practice (§4.2 Saudi/GCC frame): for groin and ventral hernias, regional practice adapts international HerniaSurge and EHS/AHS guidelines while counseling women of childbearing age on pregnancy timing relative to elective mesh repair.

• Kaufmann et al., Lancet 2018 RCT (PMID 29459021)
• EHS / AHS Umbilical & Epigastric Hernia Guidelines — as cited in Table 4.1