DONATO ALARCÓN-SEGOVIA, M.D.
To the editor: Michiels and coworkers (1) incur a post hoc, ergo propter hoc error in their otherwise interesting study on erythromelalgia. First, they study only patients with erythromelalgia related to thrombocythemia; second, they practically consider as a sine qua non the long-acting effect of aspirin for the diagnosis of erythromelalgia and attribute it to the effect of aspirin on platelet aggregation and prostaglandin synthesis; and third, they discount other causes of erythromelalgia because their patients neither have thrombocythemia nor, according to the authors, respond to aspirin.
Besides this faulty logic, the authors concede in their introduction, but negate in their
ALARCÓN-SEGOVIA D. Erythromelalgia Without Thrombocythemia. Ann Intern Med. ;103:473. doi: 10.7326/0003-4819-103-3-473_2
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Published: Ann Intern Med. 1985;103(3):473.
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