Three months later, she died of a Type A aortic dissection on a treadmill at a hotel gym.

A spontaneous collapse of the lung is a strong indicator of connective tissue weakness and scores 2 points.

The calculator wasn't wrong. He was.

Marcus re-ran her numbers. He had missed the soft palate, the high-arched roof of her mouth that she'd mentioned offhand ("My dentist always complains about my palate"). He had missed the skin striae, dismissing them as stretch marks from pregnancy. The calculator had weighted those at 2.1 and 1.8 respectively. He had input them as zeros.

A "Marfan calculator" typically refers to the standardized clinical tools used by medical professionals to diagnose based on the 2010 Revised Ghent Nosology . Because Marfan syndrome affects multiple organ systems—including the heart, eyes, and skeleton—these calculators help "add up" various physical findings to determine if a patient meets the threshold for a formal diagnosis. Core Types of Marfan Calculators 1. Systemic Score Calculator