Technical & Scientific Reference
Body Surface Area: Oncology Indexing & Mosteller Formula
Why chemotherapy dosing is indexed to m² rather than kilograms, and how the Mosteller simplification became standard.
In 1987, Dr. Richard D. Mosteller published a simplified BSA formula in the New England Journal of Medicine: BSA (m²) = √[(Height in cm × Weight in kg) / 3600]. It replaced cumbersome multi-exponential equations like Du Bois and Gehan-George with identical statistical fidelity.
📜 Historical Discovery & Context:
In 1916, Delafield Du Bois and Eugene Du Bois painstakingly coated human subjects in paper molds to calculate total body skin area. Their equation BSA = 0.007184 × W^0.425 × H^0.725 stood for seven decades until Mosteller proved that a clean square root of (H × W)/3600 yields equivalent accuracy and eliminates arithmetic transcription errors.
Fascinating Case Studies & Observations:
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Chemotherapy agents with narrow therapeutic windows (like doxorubicin, cisplatin, and fluorouracil) are dosed per square meter of BSA because drug clearance, hepatic blood flow, and glomerular filtration rate scale allometrically with surface area rather than body fat.
Status: Documented
Verified Literature Citations:
- Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987; 317(17):1098. PubMed PMID: 3657876 ↗
- Calvert AH, Newell DR, Gumbrell LA, et al. Carboplatin dosage: prospective evaluation of a simple formula based on renal function. J Clin Oncol. 1989; 7(11):1748-56. PubMed PMID: 2681557 ↗