{"uid":"cap_yvjOnLKe77oq_TKj3eIi5","slug":"fong-1999-clinical-risk-score-for-hepatic-resection-colorectal-2a118510","name":"Fong 1999 Clinical Risk Score for Hepatic Resection (Colorectal Metastases)","description":"Fong 1999 clinical score after hepatic resection for metastatic colorectal cancer: five caller-assigned preoperative flags (node-positive primary, disease-free interval <12 months, more than one hepatic tumor, largest tumor >5 cm, CEA >200 ng/mL), 1 point each, score 0–5. favorable is true iff score ≤2. Not a resectability decision or adjuvant protocol. magent does not interpret imaging or pathology.","url":"https://api.magentlab.com/api/calc/fong","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["node_positive_primary","dfi_lt_12_months","more_than_one_hepatic_tumor","largest_tumor_gt_5_cm","cea_gt_200"],"properties":{"cea_gt_200":{"type":"boolean","description":"CEA >200 ng/mL (Fong 1999). Caller already applied the published threshold; equality at 200 ng/mL does not meet. true or false."},"dfi_lt_12_months":{"type":"boolean","description":"Disease-free interval from primary to metastases <12 months (Fong 1999). Caller already applied the published threshold; equality at 12 months does not meet. true or false."},"largest_tumor_gt_5_cm":{"type":"boolean","description":"Largest hepatic tumor >5 cm (Fong 1999). Caller already applied the published threshold; equality at 5 cm does not meet. true or false."},"node_positive_primary":{"type":"boolean","description":"Node-positive primary (Fong 1999). true or false as assigned by the caller. magent does not interpret pathology."},"more_than_one_hepatic_tumor":{"type":"boolean","description":"More than one hepatic tumor (Fong 1999). true or false as assigned by the caller. magent does not interpret imaging."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_i3XNb0W-B5CZPHVQTl8fv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Fong 1999 five-factor preoperative clinical risk score (0–5) for patients undergoing hepatic resection for metastatic colorectal cancer, and flags whether the score is favorable (≤2).","exampleAgentPrompt":"Calculate the Fong 1999 hepatic resection score for a patient with a node-positive primary, disease-free interval under 12 months, only one hepatic tumor, largest tumor is 4 cm, and CEA of 150 ng/mL — is the score favorable?","exampleUseCases":[{"title":"Preoperative risk stratification for liver resection","prompt":"I have a patient with metastatic colorectal cancer being evaluated for liver resection. The primary was node-positive, disease-free interval was 8 months, there are two hepatic tumors, the largest is 3 cm, and CEA is 180 ng/mL. What's their Fong score and is it considered favorable?"},{"title":"Oncology pipeline automated scoring","prompt":"For our CRC surgery dashboard, run the Fong 1999 score on this patient: node-positive primary yes, DFI less than 12 months yes, more than one hepatic tumor no, largest tumor greater than 5 cm no, CEA greater than 200 ng/mL no. Give me the total score and whether it's favorable."},{"title":"Clinical trial eligibility pre-screening","prompt":"We're pre-screening patients with hepatic colorectal mets for a trial. This patient has a node-negative primary, DFI of 14 months, one hepatic lesion, largest tumor 6 cm, and CEA of 210 ng/mL. Compute their Fong score so we can document preoperative risk category."}],"resultDescription":"Returns the integer Fong clinical risk score (0–5) summed from the five boolean risk factors, plus a 'favorable' boolean indicating whether the score is ≤2, along with the individual flag values used in the computation.","failureModes":["Missing required boolean parameter returns a validation error","Non-boolean value for a flag field causes a schema error","Equality at a threshold (e.g. CEA exactly 200, DFI exactly 12 months) must be pre-resolved by the caller — the API does not adjudicate borderline values","Network timeout or 402 payment failure if USDC balance is insufficient"],"whenToPreferThis":"Use this endpoint when you need a reliable, automated implementation of the published Fong 1999 five-criterion clinical risk score specifically for colorectal cancer hepatic resection prognosis. Prefer it over manual calculation in agentic or pipeline workflows where reproducibility matters. Note: this endpoint only performs the arithmetic scoring — it does not assess resectability, interpret imaging, or recommend adjuvant therapy.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:01:20.993Z","isFirstParty":false}