Serge Perrin: Recurring Hemiplegia and Ocular Lesions Healed at Lourdes
It happened — and nature accounts for it.
The account
A French man with six years of recurring right-sided paralysis and vision loss from bilateral carotid artery disorders felt sudden warmth and complete recovery at Lourdes in 1970 — recognized in 1978 but disputed by American neurologists.
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Serge Perrin, from Le Lion-d'Angers in France, began experiencing recurring episodes of right hemiplegia and visual loss in February 1964. Over six years the episodes worsened; he became wheelchair-dependent and nearly blind. The diagnosed cause was bilateral carotid artery disorder. During a Lourdes pilgrimage in May 1970 he felt a sudden warmth, his vision returned, and he walked unaided.
At one subsequent medical examination, 170 physicians were present and declared the cure "extraordinary, certain and lasting." The CMIL voted to certify the cure as medically inexplicable. The Bishop of Angers recognized it as miraculous on June 17, 1978.
A team of American neurologists later reviewed the dossier. They found that neither a lumbar puncture nor a brain scan had been performed — the two tests that would have established or refuted an organic cause for the hemiplegia.
Reviewer Notes
We weigh a claim on two things, kept separate from the story above.
Assessed by Miracles Jar AI
Formally recognized 1978; American neurologists disputed the organic diagnosis as unestablished — conversion disorder cannot be excluded.
This is probably the most medically disputed recognized Lourdes cure. The case attracted significant critical medical attention after the American neurological team reviewed the dossier.
For authenticity: 170 physicians at a single examination declared the cure "extraordinary, certain and lasting," and the Church formally recognized it in 1978 after the CMIL vote. The large-scale physician examination supports the reality of the recovery — but it speaks to the recovery, not its cause.
Against: The independent American team found that a spinal tap (lumbar puncture) and brain scan — the standard diagnostic tests for the claimed organic cause — had never been performed before or after the cure. Without these, organic etiology cannot be established. The team concluded that recurring unilateral hemiplegia with visual symptoms, in the absence of neuroimaging, is a classic presentation of conversion disorder (hysteria), which resolves spontaneously and abruptly without a fixed organic lesion. They judged conversion disorder the most probable diagnosis given the available data.
The CMIL's "medically inexplicable" finding rested on clinical records that lacked the baseline neuroimaging needed to establish organic causation. These diagnostic gaps make this one of the more contested formally recognized Lourdes cures. The Church's recognition stands, but the scientific basis for an organic miracle here is substantially undermined, and conversion disorder cannot be excluded. This case sits at the low end of the authenticity spectrum — the evidence leaves it very unlikely that an organic cure occurred here.
Evidence ledger — what the verdict rests on
170 physicians at single examination declared cure 'extraordinary, certain and lasting'; formally recognized by CMIL and Church
Large-scale physician examination supports the reality of recovery; not the cause
Neither spinal tap nor brain scan was performed to establish organic causation before or after cure
American neurologists identified this as a fatal gap in the dossier; without neuroimaging, organic etiology cannot be established
Recurring unilateral hemiplegia with visual symptoms is a classic presentation of conversion disorder, which resolves spontaneously
American team concluded conversion disorder was the most probable diagnosis given available data
What would raise this score: Documented recurrence in cases with no expectancy pathway — or records ruling out functional overlay — would raise the meter.
What would lower it: Evidence of symptom relapse, revised diagnosis, or undisclosed treatment would lower the evidence bar.
How this works
We keep two questions apart on purpose — so a thin record can’t make an impossible thing look proven, and a strong record can’t dress up an ordinary one as a miracle. First: Could nature explain it? (taking the account as true for the moment.) The question is whether nature could produce this at all — assuming, for the moment, the events are true as described. Second: is there real evidence it happened? A claim only stands out when both hold up — and we never call anything certain either way. How ratings work →
The natural explanation
The leading natural account for this case is expectation, suggestion & the placebo response. Read what it explains — and where it stops.
Sources
Tagged by proximity to the event. Primary sources are direct or contemporaneous; tertiary are downstream retellings.
- 1.Secondaryinvestigation
"Do Miracles Happen? — The Irish Times", 1999· no public link
Presents the American neurologists' critique of the Perrin dossier; describes the missing spinal tap and brain scan
- 2.Tertiaryother
"Lourdes Medical Bureau — Wikipedia", 2024· no public link
Lists Perrin among recognized cures with brief details
Cases like this
Nearest on the map — similar in how miraculous they’d be, and how strong the evidence is.