Long-term low-dose methotrexate exposure (≥1-2 years, ≥15 mg/week cumulative or PO 7.5-25...
Детермінований перегляд YAML-сутності з джерельної бази. Клінічний авторитет лишається за вказаними source ID та статусом клінічного sign-off.
| ID | RF-IATROGENIC-METHOTREXATE-LONGTERM-LYMPHOMA-PREVENTION |
|---|---|
| Тип | Тривожна ознака |
| Статус | переглянуто 2026-05-19 | очікує клінічного підпису |
| Хвороби | DIS-DLBCL-NOS |
| Джерела | SRC-NCCN-BCELL-2025 |
Походження тривожної ознаки
| Визначення | Long-term low-dose methotrexate exposure (≥1-2 years, ≥15 mg/week cumulative or PO 7.5-25 mg/week chronic) for autoimmune indications including rheumatoid arthritis, psoriasis, psoriatic arthritis, Crohn's disease — associated with methotrexate-associated lymphoproliferative disorders (MTX-LPD), most commonly diffuse large B-cell lymphoma (DLBCL) or polymorphic LPD with EBV co-positivity in many cases. Incidence ~1-3% over 5 years of cumulative exposure; Japanese rheumatoid cohorts show higher signal (likely population EBV seroprevalence). Distinctive feature: ~30-60% of MTX-LPD cases regress on MTX withdrawal alone (no chemotherapy needed) — this signature uniquely identifies the iatrogenic etiology. Risk also modestly elevated for solid cancers (skin SCC, melanoma) — separate signal. Prevention-persona RedFlag (§20, v0.3 iatrogenic expansion). |
|---|---|
| Клінічний напрям | investigate |
| Категорія | other |
Логіка спрацьовування
{
"any_of": [
{
"finding": "methotrexate_longterm_low_dose_autoimmune",
"value": true
},
{
"finding": "methotrexate_ge_1y_cumulative",
"value": true
},
{
"finding": "mtx_lpd_susceptible_cohort",
"value": true
}
],
"type": "lab_value"
}
Нотатки
Prevention-persona RedFlag for long-term low-dose MTX exposure (RA, psoriasis, IBD). Surveillance: low-threshold workup for unexplained lymphadenopathy, B-symptoms, organomegaly, mass — MTX withdrawal + observe 8-12 weeks first (~50% regress); persistent → DLBCL-style workup. Skin examination annually. STUB pending two-Co-Lead signoff per CHARTER §6.1 dev-mode.
Де використовується
Indications
IND-IATROGENIC-METHOTREXATE-LONGTERM-LYMPHOMA-PREVENTION-OBSERVATION- IND-IATROGENIC-METHOTREXATE-LONGTERM-LYMPHOMA-PREVENTION-OBSERVATIONIND-IATROGENIC-METHOTREXATE-LONGTERM-LYMPHOMA-PREVENTION-SURVEILLANCE- IND-IATROGENIC-METHOTREXATE-LONGTERM-LYMPHOMA-PREVENTION-SURVEILLANCE