The real malady of Marcel Proust and what it reveals about diagnostic errors in medicine.

Marcel Proust, author of À La Recherche du Temps Perdu, was considered a hypochondriac not only by the numerous specialists he consulted during his lifetime but also by every literary critic who ventured an opinion on his health, among them several clinicians. However, Proust's voluminous correspondence, as detailed in its attention to his every symptom as his novel, provides valuable clues to Proust's real, organic, and rare illness. Proust, in fact, was not only genuinely ill but far sicker than he even he believed, most likely suffering from the vascular subtype of Ehlers-Danlos Syndrome. Ironically, Proust's own doctors and his clinician-critics replicated the same kinds of diagnostic errors clinicians still routinely make today, shedding light on the plight of patients with rare illnesses.