Synthetic educational example. Do not self-treat: a qualified treating physician must verify the sources, patient data, contraindications, and final plan.
Patient
BREAST-HER2-MET-2L-001 · Algorithm: ALGO-BREAST-HER2-POS-2L
Clinical significance of mutations (ESCAT)
Tumor-board context — the engine does not use these tiers to rank tracks
| Biomarker | Variant | ESCAT | Evidence | Clinical significance | Drugs | Sources |
|---|
| ESCAT: clinical review pendingBIO-HER2-LOW | IHC 1+ OR IHC 2+/ISH-negative (HER2-low by ASCO/CAP 2023 criteria) | IA | Standard care - SRC-DESTINY-BREAST04-MODI-2022: Level A (Supports, Sensitivity/Response)
- SRC-NCCN-BREAST-2025: Level Category 1 (Supports, Sensitivity/Response)
- SRC-ESMO-BREAST-METASTATIC-2024: Level A (Supports, Sensitivity/Response)
| Trastuzumab deruxtecan (T-DXd, DS-8201) is FDA-approved (Aug 2022) for unresectable or metastatic HER2-low (IHC 1+ or 2+/ISH-) breast cancer following prior chemotherapy. DESTINY-Breast04 (Modi et al. NEJM 2022): HR+/HER2-low — mPFS 10.1 vs 5.4 mo (HR 0.49, p<0.001); mOS 23.9 vs 17.5 mo (HR 0.64, p=0.003). HR-/HER2-low (TNBC subgroup) — mOS 18.2 vs 8.3 mo. DESTINY-Breast06 (Curigliano et al. NEJM 2024) extended indication to HER2-low and HER2-ultralow (IHC 0 with incomplete staining) HR+/HER2- endocrine-pretreated patients — mPFS 13.2 vs 8.1 mo (HR 0.62, p<0.001). T-DXd dose: 5.4 mg/kg IV q3w. Key safety: interstitial lung disease (ILD) / pneumonitis ~12% (grade ≥3 ~3%) — mandatory baseline CT and monitoring per NCCN/ESMO. HER2-low reclassification affects ~60% of previously HER2-negative metastatic breast cancer patients — large population impact. | trastuzumab deruxtecan (T-DXd) 5.4 mg/kg IV q3w monotherapy (post-chemotherapy; DESTINY-Breast04)
trastuzumab deruxtecan (T-DXd) 5.4 mg/kg IV q3w monotherapy (post-endocrine HR+ disease; DESTINY-Breast06) | - SRC-NCCN-BREAST-2025
- SRC-ESMO-BREAST-METASTATIC-2024
- SRC-DESTINY-BREAST04-MODI-2022
|
| Biomarker | Status |
|---|
| BIO-ER | Excluded (negative) |
| BIO-PR | Excluded (negative) |
Primary current-line option
- Indication
- IND-BREAST-HER2-POS-MET-2L-TDXD
- Regimen
- T-DXd monotherapy (HER2+ metastatic 2L+, also HER2-low metastatic)
- Drugs + NSZU
- Trastuzumab deruxtecan (T-DXd) (DRUG-TRASTUZUMAB-DERUXTECAN) 5.4 mg/kg IV · Day 1 of 21-day cycle, continuous until progression · IV ✓ NSZU covered
- Supportive care
- SUP-BONE-HEALTH-PROSTATE
- Reason
- Primary current-line option selected by ALGO-BREAST-HER2-POS-2L at step 3.
Other current-line alternatives (1 tracks)
Same treatment line; review when biomarker, access, contraindication, or patient-context assumptions change.
- Indication
- IND-BREAST-HER2-POS-3L-TUCATINIB
- Regimen
- Tucatinib + trastuzumab + capecitabine (HER2+ metastatic ≥3L, especially with brain metastases)
- Drugs + NSZU
- Tucatinib (DRUG-TUCATINIB) 300 mg PO BID continuous · Continuous (no off-day) within 21-day cycle · PO ✗ Not registered in UA
- Trastuzumab (DRUG-TRASTUZUMAB) 8 mg/kg IV loading, then 6 mg/kg IV q3w · Day 1 of every 21-day cycle · IV ✓ NSZU covered
- Capecitabine (breast indication entry) (DRUG-CAPECITABINE-BREAST) 1000 mg/m² PO BID days 1-14 of 21-day cycle · Days 1-14, then 7-day rest · PO ✓ NSZU covered
- Reason
- Current-line alternative presented for HCP consideration
Why this branch was chosen
Triggers from the patient profile that fired and drove the chosen branch.
Step 1 → branch 2
- RF-BREAST-HER2-AMP-ACTIONABLE ★ winner: HER2 amplification / overexpression in breast cancer (IHC 3+ OR IHC 2+ with ISH amplified) — ~15-20% of invasive breast. Defines HER2-positive treatment track: trastuzumab + pertuzumab + chemo (CLEOPATRA 1L), T-DXd 2L (DESTINY-Breast03 — mPFS 28.8 vs 6.8 mo vs T-DM1).
SRC-NCCN-BREAST-2025SRC-ESMO-BREAST-METASTATIC-2024SRC-DESTINY-BREAST03-CORTES-2022SRC-HER2CLIMB-MURTHY-2019
Pre-treatment investigations
Investigations before treatment start · critical / standard / desired · merged across tracks
| ID | Name | Priority | Category | Where to order | Needed for |
|---|
| TEST-CECT-CAP | CECT chest/abdomen/pelvis | Critical | imaging | — | all tracks |
| TEST-ER-PR-IHC | ER + PR immunohistochemistry on tumor | Critical | — | CSD Lab ✓ (code TBC) | all tracks |
| TEST-HER2-IHC-FISH | HER2 IHC + reflex FISH on tumor | Critical | — | CSD Lab ✓ (code TBC) | all tracks |
| TEST-MRI-BRAIN-CONTRAST | MRI brain with contrast | Standard | imaging | — | all tracks |
Red flags — PRO / CONTRA aggressive
PRO-AGGRESSIVE
Triggers that push toward the aggressive track
CONTRA-AGGRESSIVE
Hard contraindications to escalation
Timeline
Treatment timeline — derived from regimen + monitoring schedule
Standard plan
Induction · T-DXd monotherapy (HER2+ metastatic 2L+, also HER2-low metastatic)
21-day cycles × Continuous until progression or unacceptable toxicity
Standard plan
Induction · Tucatinib + trastuzumab + capecitabine (HER2+ metastatic ≥3L, especially with brain metastases)
21-day cycles × Continuous until progression or unacceptable toxicity
MDT brief
Data quality
Usable with caveats. No critical default-track gap was found, but the MDT should review the listed caveats before final sign-off.
- Biomarker coverage: 1/1 known (100%), 0 missing, 0 default-track gaps
- Unevaluated RedFlags: RF-ACTIVE-AUTOIMMUNE-DISEASE-ICI-RISK, RF-ATM-CONFIRMED-CARRIER, RF-ATM-FAMILY-HISTORY-SUSPICION, RF-BARD1-CONFIRMED-CARRIER, RF-BARD1-FAMILY-HISTORY-SUSPICION, RF-BLM-CONFIRMED-CARRIER, RF-BRCA-CONFIRMED-CARRIER, RF-BRCA-HBOC-FAMILY-HISTORY-SUSPICION, RF-BREAST-AKT1-E17K-ACTIONABLE, RF-BREAST-AKT1-E17K-CAPIVASERTIB-CANDIDATE, RF-BREAST-BRCA-GERMLINE-ACTIONABLE, RF-BREAST-CDH1-LOBULAR-CANDIDATE, RF-BREAST-EARLY-STAGE, RF-BREAST-ESR1-MUT-ACTIONABLE, RF-BREAST-ESR1-Y537S-D538G-CANDIDATE, RF-BREAST-FRAILTY-AGE, RF-BREAST-HER2-LOW-ACTIONABLE, RF-BREAST-HER2-ULTRALOW-CANDIDATE, RF-BREAST-HIGH-RISK-BIOLOGY, RF-BREAST-INFECTION-SCREENING, RF-BREAST-ORGAN-DYSFUNCTION, RF-BREAST-OVARIAN-HRD-ASSAY-DISTINCTION, RF-BREAST-PIK3CA-COALT-INAVOLISIB-CANDIDATE, RF-BREAST-PIK3CA-MUT-ACTIONABLE, RF-BREAST-STAGE-IV-METASTATIC, RF-BREAST-TNBC, RF-BREAST-TRANSFORMATION-PROGRESSION, RF-CASCADE-BRCA-FDR-POSITIVE, RF-CASCADE-LFS-FDR-POSITIVE, RF-CHEK2-CONFIRMED-CARRIER, RF-CHEK2-FAMILY-HISTORY-SUSPICION, RF-CHRONIC-SEVERE-OBESITY-BMI40-PREVENTION, RF-CHRONIC-T2DM-CANCER-RISK-PREVENTION, RF-COWDEN-CONFIRMED-CARRIER, RF-COWDEN-FAMILY-HISTORY-SUSPICION, RF-HDGC-CDH1-CONFIRMED-CARRIER, RF-IATROGENIC-COMBINED-HRT-PREVENTION, RF-IATROGENIC-IODINE131-SECONDARY-PREVENTION, RF-IATROGENIC-LONG-TERM-HRMNL-CONTRACEPTION-PREVENTION, RF-IATROGENIC-PRIOR-RADIATION-PREVENTION, RF-LI-FRAUMENI-CONFIRMED-CARRIER, RF-LI-FRAUMENI-FAMILY-HISTORY-SUSPICION, RF-LIFESTYLE-ALCOHOL-CANCER-PREVENTION, RF-LIFESTYLE-OBESITY-CANCER-PREVENTION, RF-LIFESTYLE-SEDENTARY-PREVENTION, RF-LIFESTYLE-SUGARY-BEVERAGES-PREVENTION, RF-NBN-CONFIRMED-CARRIER, RF-NF1-CONFIRMED-CARRIER, RF-NF1-FAMILY-HISTORY-SUSPICION, RF-OCC-IONIZING-RADIATION-PREVENTION, RF-OCC-SHIFTWORK-CIRCADIAN-PREVENTION, RF-PALB2-CONFIRMED-CARRIER, RF-PALB2-FAMILY-HISTORY-SUSPICION, RF-PAN-ATM-CHEK2-CDK12-PARPI-CANDIDATE, RF-PAN-BRCA-SOMATIC-PARPI-CANDIDATE, RF-PAN-PALB2-PARPI-CANDIDATE, RF-PEUTZ-JEGHERS-CONFIRMED-CARRIER, RF-PEUTZ-JEGHERS-FAMILY-HISTORY-SUSPICION, RF-RAD51C-D-CONFIRMED-CARRIER, RF-RAD51C-D-FAMILY-HISTORY-SUSPICION, RF-REPRODUCTIVE-BREAST-ENDOMETRIAL-PREVENTION, RF-REPRODUCTIVE-DES-IN-UTERO-EXPOSURE-PREVENTION, RF-REPRODUCTIVE-LATE-FIRST-PREGNANCY-PREVENTION, RF-REPRODUCTIVE-OCP-LONG-TERM
Technical MDT skill metadata (0/16 activated in this plan)
All registered virtual specialists. ✓ — activated for this case; ○ — not activated (available for other clinical scenarios).
| Specialist | skill_id | Version | Last reviewed | Sign-offs | Domain |
|---|
| Cellular therapy specialist (CAR-T) | cellular_therapy_specialist | v0.1.0 | 2026-04-25 | 0 | cellular_therapy |
| Clinical pharmacist | clinical_pharmacist | v0.1.0 | 2026-04-25 | 0 | clinical_pharmacy |
| Hematologist / oncohematologist | hematologist | v0.1.0 | 2026-04-25 | 0 | hematology_oncology |
| Hematopathologist (lymphoma / leukemia / myeloma) | hematopathologist | v0.1.0 | 2026-04-25 | 0 | hematopathology |
| Infectious disease / hepatology | infectious_disease_hepatology | v0.1.0 | 2026-04-25 | 0 | infectious_diseases |
| Medical oncologist (solid-tumor chemotherapist) | medical_oncologist | v0.1.0 | 2026-04-25 | 0 | solid_oncology |
| Molecular geneticist / molecular oncologist | molecular_geneticist | v0.1.0 | 2026-04-25 | 0 | molecular_oncology |
| Palliative care | palliative_care | v0.1.0 | 2026-04-25 | 0 | palliative_care |
| Pathologist (general) | pathologist | v0.1.0 | 2026-04-25 | 0 | pathology |
| Primary care / family physician | primary_care | v0.1.0 | 2026-04-25 | 0 | primary_care |
| Psycho-oncologist | psychologist | v0.1.0 | 2026-04-25 | 0 | psychosocial |
| Radiation oncologist | radiation_oncologist | v0.1.0 | 2026-04-25 | 0 | radiation_oncology |
| Radiologist | radiologist | v0.1.0 | 2026-04-25 | 0 | diagnostic_imaging |
| Social worker / case manager | social_worker_case_manager | v0.1.0 | 2026-04-25 | 0 | psychosocial |
| Surgical oncologist | surgical_oncologist | v0.1.0 | 2026-04-25 | 0 | surgical_oncology |
| Transplant specialist (BMT) | transplant_specialist | v0.1.0 | 2026-04-25 | 0 | cellular_therapy |
Sources cited
- SRC-DESTINY-BREAST03-CORTES-2022: Trastuzumab Deruxtecan versus Trastuzumab Emtansine for Breast Cancer (2022)
- SRC-ESMO-BREAST-METASTATIC-2024: ESMO Clinical Practice Guideline on Metastatic Breast Cancer (2024)
- SRC-HER2CLIMB-MURTHY-2019: Tucatinib, Trastuzumab, and Capecitabine for HER2-Positive Metastatic Breast Cancer (2019)
- SRC-NCCN-BREAST-2025: NCCN Clinical Practice Guidelines — Breast Cancer (2025.v4)
Experimental options (clinical trials)
Third plan track — open-enrollment trials from ClinicalTrials.gov. Render-time metadata; engine selection is not affected by this block (CHARTER §8.3). Last synced: 2026-08-17.
| NCT | Title | Phase | Status | Sponsor | UA | Signals | Eligibility (excerpt) |
|---|
| NCT05059444 | ORACLE: Observation of ResiduAl Cancer With Liquid Biopsy Evaluation | N/A | RECRUITING | — | — | |
| NCT07137416 | Testing the Safety of the Combination of Anti-Cancer Drugs CX-5461 (Pidnarulex) and Trastuzumab Deruxtecan (T-DXd) for Human Epidermal Growth Factor Receptor 2 (HER2)-Positive Solid Tumors and Breast Cancer | PHASE1 | RECRUITING | — | Phase 1 only Small N (<50) Single country | |
Verify recruitment status directly with the trial site. ctgov data can lag behind current UA-site status.
Option availability in Ukraine
Per-track UA registration · NSZU · cost · access pathway. Render-time metadata; engine selection does not depend on these fields (CHARTER §8.3).
| Option | UA registration | NSZU | Cost orientation | Access pathway |
|---|
| Standard plan T-DXd monotherapy (HER2+ metastatic 2L+, also HER2-low metastatic) (REG-TDXD-METASTATIC) | ✓ registered | ✓ covered | ₴-? — verify pathway | NSZU formulary |
| Standard plan Tucatinib + trastuzumab + capecitabine (HER2+ metastatic ≥3L, especially with brain metastases) (REG-TUCATINIB-TRASTUZUMAB-CAPECITABINE-BREAST) 1/3 component drug(s) not registered in Ukraine +1 | ✗ not registered | ✗ out-of-pocket | ₴-? — verify pathway | not recorded |
| Trial · NCT05059444 ORACLE: Observation of ResiduAl Cancer With Liquid Biopsy Evaluation No UA site listed — international referral required | — unknown | — unknown | self-pay: ₴0/course | Trial sponsor |
| Trial · NCT07137416 Testing the Safety of the Combination of Anti-Cancer Drugs CX-5461 (Pidnarulex) and Trastuzumab Deruxtecan (T-DXd) for Human Epidermal Growth Factor Receptor 2 (HER2)-Positive Solid Tumors and Breast Cancer No UA site listed — international referral required | — unknown | — unknown | self-pay: ₴0/course | Trial sponsor |
Cost information is orientation. Verify with a specific pharmacy / foundation / trial site. Status updated: 2026-08-17.