ASCRS Ch65 - Middle and Anterior Pelvic Compartment: Issues for the Colorectal Surgeon

Chapter 65 of the ASCRS Textbook of Colon and Rectal Surgery, 4th edition (Patterson D, Gearhart SL, Birnbaum E). PDF pages 1062-1071, book pages 1077-1086 (offset +15 — a jump from +14, confirmed via the "© Springer Nature Switzerland AG 2022 1077" copyright line on the chapter's first PDF page). This jump was predicted at the end of the Ch64 ingest, since Ch64 ended on odd book page 1075.

Second offset jump discovered at the Ch65/Ch66 boundary, via a new mechanism: Ch65 ends on book page 1086, an even page — per the usual chapter-boundary rule this would predict no jump. However, PDF page 1072 is a Part divider page ("Part VI / Miscellaneous") with no chapter content, and Ch66 ("Pediatric Colorectal Disorders") begins at PDF page 1073 with copyright line "© Springer Nature Switzerland AG 2022 1089" — book page 1089, i.e. offset +16, one more than this chapter's +15. The mechanism here is distinct from the usual "chapter ends on an odd page" rule: the Part divider itself is printed on its own recto (odd) page — book page 1087 — with its verso (book page 1088) left blank in print and dropped from the PDF, the same recto-forcing convention applied to chapters, applied here to a Part-level divider instead. Net effect: 2 book pages (1087 divider + 1088 blank) correspond to only 1 PDF page (1072), producing the additional +1 jump. This is the fifth chapter/section-boundary offset jump found across the ingest arc, and the first attributable to a Part divider rather than a plain chapter boundary — a new pattern to watch for at future Part transitions.

Structure and content

A urogynecology-authored chapter (all three authors are gynecology/urogynecology, not colorectal surgery, department affiliations) aimed at colorectal surgeons managing patients with multicompartment pelvic organ prolapse (POP). Covers:

• Definition, etiology, and epidemiology: the three-compartment model (anterior/middle/posterior), prevalence (3-50% depending on definition, lifetime surgical risk 12.6% by age 80), risk factors for primary POP (vaginal parity as strongest predictor, age, obesity, hysterectomy) and recurrent POP (age <60, obesity, Stage III-IV at presentation), and evolving reoperation-rate estimates.
• Evaluation: symptom domains (sexual, urinary, defecatory) via Table 65.2; validated instruments (PFDI-20, PFIQ-7, PISQ-12); the POP-Q exam and its full staging system (Stage 0-4); indications for further imaging (ultrasound, dynamic MRI, cinedefecography) and urodynamics.
• Indications and outcomes for anterior/middle compartment approaches: nonoperative management (lifestyle, pelvic floor PT, estrogen, pessary); the obliterative-vs-reconstructive and transvaginal-vs-transabdominal decision points; apical suspension (SSLF, USLS), anterior/posterior colporrhaphy, midurethral slings for SUI, and sacrocolpopexy technique and candidacy; the FDA mesh-warning history and the CARE trial's mesh-erosion data; Chughtai et al.'s mesh-infection risk-combination data.
• Multidisciplinary approach to pelvic floor prolapse: shared pelvic support anatomy across compartments, the case against single-compartment correction in isolation, the rectocele-as- consequence-not-cause argument, combined sacrocolpopexy+rectopexy technique/sequencing and outcome data (including TAPE-score functional improvement), and operative safety of adding a rectopexy to a sacrocolpopexy.

Wiki integration

New concept page Pelvic Organ Prolapse (Anterior & Middle Compartment) created — this fills a gap explicitly flagged and deferred on three existing pages: Obstructed Defecation Syndrome (ODS)'s "no dedicated page yet exists for enterocele/sigmoidocele... revisit if a urogynecology-focused source is ever ingested," Rectocele's multidisciplinary cross-reference, and Rectal Prolapse Repair's "multidisciplinary evaluation increasingly recommended" note. Light cross-reference additions to all three of those pages plus Rectal Prolapse (Procidentia) and Sexual Function After Colorectal Surgery (shared PISQ questionnaire family). No new condition/procedure pages split out — this remains posterior-compartment territory for the wiki's core content; the new page deliberately stays scoped to what a colorectal surgeon needs for multicompartment coordination, per the same design decision as Colorectal Endometriosis.

Offset tracking

• Chapter starts: PDF p.1062, book p.1077 (offset +15 — jump from +14, predicted at the end of the Ch64 entry and confirmed via copyright line).
• Chapter ends: book p.1086 (even page) — the usual chapter-boundary rule would predict no jump, but a Part divider page (PDF p.1072, "Part VI: Miscellaneous") intervenes before Ch66, forcing an additional blank page and a further +1 jump to +16.
• Ch66 confirmed starting at PDF p.1073/book p.1089, offset +16 (copyright line verified).