Canonical corpus completed: all 18 planned wiki pages were written and left at status: draft, spanning definition/diagnostic validity, burden, biology, risk, imaging, clinical differentiation, conservative care, procedures, surgery, regeneration, outcomes, guidelines, biomarkers, trials, patient experience and safety. Page lengths are 202–291 lines and each non-registry page contains 25–36 live-verified PubMed citations; the trials page additionally carries registry-verified NCT identifiers.
PubMed search and verification: 49 topic-focused PubMed E-utilities searches covered epidemiology, natural history, asymptomatic imaging, grading, Modic changes, pain validity, anatomy, biomechanics, nutrition, genetics, exposures, molecular pathways, biomarkers, conservative care, medicines, behavioral care, injections, ablation, surgery, outcomes, regenerative approaches, lived experience and red flags. Exact-record EFetch calls were used to complete and normalize metadata. The finished wiki corpus cites 243 unique PMIDs, each present in the live query corpus from this session.
ClinicalTrials.gov search and verification: two live API v2 searches—“Degenerative Disc Disease” and “intervertebral disc degeneration OR discogenic low back pain OR vertebrogenic low back pain”—were captured on 2026-08-29. Trial status tables distinguish recruiting, active-not-recruiting, completed and stopped studies; registration is not treated as evidence of efficacy.
Guideline and public-source checks: live official-site searches covered WHO, NICE, VA/DoD, NASS, ACP, ASIPP, ACOEM, KCE and national Australian, Danish and German sources. Patient-voice source checks covered public pain/back organizations and health-system resources in the UK, US, Australia, Canada and Europe; access dates and provenance are recorded in the source files.
Research frontier rewritten:OPEN-QUESTIONS.md now contains 20 Tier 1 questions designable now, 12 Tier 2 questions awaiting prerequisite methods, and 15 explicit “Dots not yet connected” hypotheses.
Boundary decisions: retained low-back-pain burden estimates as contextual rather than calling them DDD prevalence; separated radiographic degeneration, discogenic pain, vertebrogenic pain, radiculopathy and spinal stenosis; treated regenerative imaging signals as exploratory rather than validated surrogates; and did not infer guideline currency where official status was unclear.
Known evidence gaps: there is no independent gold standard for a painful disc or level; diagnostic and trial phenotypes remain inconsistent; treatment-effect evidence is difficult to compare across rehabilitation, procedures and surgery; long-term cell/device surveillance is incomplete; and patient-voice evidence remains geographically and linguistically concentrated.
Lifecycle: roadmap advanced from seeded to built. Independent citation audit and page promotion from draft to curated remain a separate future stage.
Canonical pages deepened: extended all 18 existing wiki pages in place; no verified content was removed and all pages remain draft. Added page-specific discriminating-evidence matrices covering population denominators, longitudinal thresholds, transport and diurnal mechanics, single-cell states, gene–environment effects, diagnostic alternatives, treatment effect sizes, surgical crossover/reoperation, guideline disagreement, biomarker validation, trial design, patient experience and red-flag likelihood ratios.
Citation density: the wiki now cites 348 unique live-resolved PMIDs, up from 243. Page-level unique-PMID counts are 31–42; the clinical-trials page contains 32 PMIDs plus 38 live-resolved NCT records. All pages remain within 150–400 lines.
PubMed searches: ran 144 live E-utilities searches—eight narrow searches per canonical page—then EFetch retrieval for 261 unique candidate records. Candidates were screened from titles and abstracts; unrelated disease papers, veterinary classifications, protocols used as if they were results and records without a resolvable PubMed article were excluded. The integrated additions emphasize systematic reviews, randomized trials, longitudinal cohorts, diagnostic-accuracy work and evidence that changes interpretation rather than citation count alone.
ClinicalTrials.gov: individually resolved all 35 NCT records already present through API v2, then ran a live query.cond=Degenerative Disc Disease sweep (100 returned records; 79 not already on the page). Added NCT06053242 as active-not-recruiting, NCT03461458 as terminated and NCT07137559 as expanded access; registration remains explicitly separated from efficacy evidence. The page now contains 38 live-resolved NCT IDs.
Literature layer: rebuilt the bibliography increment to 348 deduplicated PMIDs with page mapping; expanded the statistics bank to 162 method-qualified rows; expanded the guideline registry from 15 to 17 documents with ASPN 2022 and historical AANS/CNS fusion guidance; retained the disagreement between procedure-focused and general-care guidelines.
Research frontier: sharpened ten Tier 1 questions with explicit estimands, minimum discriminating design features and results that would redirect the question; added five cross-domain junctions to the “Dots not yet connected” table (20 total).
Quantitative additions: examples include occupational-loading ORs 1.6–3.3, health-personnel OR 2.45 (95% CI 1.41–4.26), diurnal height change 6.1–8.0%, HIZ–discography OR 8.65 (95% CI 6.01–15.23), WHO exercise SMD −0.33 (95% CI −0.58 to −0.08), adjacent clinical disease 1.8%/year (95% CI 1.3–2.4), fracture red-flag likelihood ratios and suspected-CES bladder-scan discrimination.
Unresolved/next pass: this was a build/deepening session, not the separate citation-by-citation audit required for promotion to curated. Current-status declarations for ASPN 2022 and the 2014 AANS/CNS fusion series were not established from an official supersession page and are labeled accordingly. No gold standard for a painful disc/level, product-level biologic class effect or validated quantitative-MRI surrogate was inferred.
Scope completed: audited all 18 canonical wiki pages and all 13 literature-layer artifacts (bibliography, six landmark notes, guideline registry, statistics bank and four patient-voice files). All pages remain within the 150–400-line target and contain the required TL;DR, open-questions, related-pages and full-reference sections.
PubMed verification: fetched all 348 unique cited PMIDs live through PubMed E-utilities in one EFetch corpus. Checked 924 claim-bearing PMID occurrences across wiki bodies and literature artifacts, plus 932 full-reference/bibliography metadata occurrences. Every identifier resolved; all final titles, first authors and publication years match the live records, tolerating publication-year offsets where applicable.
ClinicalTrials.gov verification: fetched all 38 pre-audit NCT records individually through API v2, re-ran broad live condition/term searches, then individually resolved the 48 NCT IDs in the final corpus. Added ten directly relevant records omitted from the earlier landscape: NCT03737461, NCT05066334, NCT05287867, NCT06144970, NCT06325566, NCT06615505, NCT07168603, NCT07254806, NCT07648927 and NCT07668466. Their recruiting, active-not-recruiting or not-yet-recruiting labels match the 2026-08-30 API records.
Errors found and fixed: corrected 100 inline author/year labels that named a non-first author (including one 2018/2017 year error); restored the missing GBD 2021 Low Back Pain Collaborators author in two page reference lists; corrected 11 bibliography tag/cited-by mappings; refreshed 26 guideline and patient-organization URLs/access dates; and updated the clinical-trials snapshot and tables from 38 to 48 live-resolved NCT records. No PMID pointed to a different paper, and no quoted quantitative result required deletion after abstract/record checking.
Stale-absence searches: reran live PubMed searches for externally validated DDD biomarkers, Pfirrmann-directed exercise selection, clinical gene/RNA therapy, DDD-specific patient-priority research and DDD-specific society guidelines; reran ClinicalTrials.gov searches for gene/RNA and disc-directed interventions; and reran web searches for DDD-specific patient organizations and official guideline status. Absolute claims were replaced with positively stated, dated evidence-gap sentences. The sweep identified one DDD-specific ODI content-validity study but no representative DDD patient-priority survey with a stated probability or validated sampling frame.
External-source verification: checked all 26 unique literature-layer URLs live. Twenty-one returned HTTP 200 directly; three rate-limited the command-line check and two Australian Commission pages produced an HTTP/2 transport error, but all five resolved through live search/open retrieval. No dead source was retained.
Final validation: zero unresolved-verification markers; zero unresolved PMID/NCT records; zero full-citation metadata mismatches; zero body/reference set mismatches; zero duplicate or unused bibliography entries; zero bibliography page-map mismatches; and zero broken local Markdown links. Remaining limitations are substantive evidence gaps, not audit flags: no independent painful-disc gold standard, no externally validated clinical biomarker or polygenic score, no human DDD gene/RNA-transfer therapy, and geographically narrow patient-voice evidence.
Lifecycle: promoted all 18 pages from draft to curated, updated the master index to audited, and advanced CONDITIONS-ROADMAP.md from built to audited.