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The Special Senses · The Evidence Behind the Case
The special senses as two more addresses the disease reaches — check our reasoning
This module reads three of Stina’s findings — a recurrent Posner-Schlossman syndrome, a trigeminal neuralgia and a sensorineural hearing loss — as three specific addresses a chronic autoinflammatory process can reach, and reads her ten normal cranial nervesNerves that arise from the brain and control head and neck functions. and three intact special senses as evidence for that specificity. Each step below is tagged for what it is: cohort evidence in FMF, general neurology, or the case’s own reading; and the things never measured in her are named as never measured.
Arrived here from a search?
This page belongs to a teaching case built around familial Mediterranean fever, an IL-1β-driven autoinflammatory disease. If you found it searching a sensory cranial nerve finding — trigeminal neuralgia, a sensorineural or high-frequency hearing loss, tinnitus — in a patient with a periodic fever or raised inflammatory markers, it is an evidence-anchored starting point.
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Each claim, its evidence, and how strong it is
| Chart finding | The claim the module makes | Supporting evidence | How strong? |
|---|---|---|---|
| Cochlear involvement in FMF Chapters 6, 7 · Clue #12 | Hearing loss, particularly at high frequencies, has been reported in FMF patient cohorts compared with controlsVariables that remain constant to ensure a fair test.; Stina’s symmetric high-frequency sensorineural loss at 43 is consistent with that pattern. | Cochlear involvement in familial Mediterranean fever: a new feature of an old disease, 2011 · Evaluation of hearing in patients with FMF, 2013 | FMF cohorts / case-control — cohort-level; her cochlea has never been imaged or examined beyond the audiogram |
| The eye in FMF Chapter 4 | Anterior uveitis during active inflammation, steroid-related pressureThe force exerted by gases in the respiratory system, affecting airflow and gas exchange. rises, cataract after recurrent anteriorThe front of the body or toward the front when standing in the anatomical position. uveitis or long steroid use, and AA amyloid in the trabecular meshwork causing secondary open-angle glaucoma are all reported in FMF; ocular involvement is uncommon and the evidence is case reports and small series. | Ophthalmic manifestations in familial Mediterranean fever: a case series of 6 patients (Yazici et al., 2014) · Update on ocular manifestations of the main monogenic and polygenic autoinflammatory diseases (Fonollosa et al., 2024) · AAO EyeWiki, Ocular manifestations of FMF | Case series / reviews — supports that FMF reaches the eye; does not name her syndrome |
| Posner-Schlossman syndrome Chapter 4 | A recurrent, unilateral spike in intraocular pressure with a mild trabeculitis, open angle and a quiet-looking eye; textbook associations are CMV and HLA-Bw54; about a quarter of patients develop glaucomatous optic neuropathy; treated with topical steroid plus β-blocker, α2-agonist and carbonic-anhydrase-inhibitor drops. | AAO EyeWiki, Glaucomatocyclitic crisis (Posner-Schlossman syndrome) · StatPearls, Posner-Schlossman syndrome | General ophthalmology — a Posner-Schlossman–FMF link is not established anywhere; the diary’s “associated with autoimmune disease” is her reading of the literature |
| Trigeminal neuralgia Chapter 2 | Trigeminal neuralgia is a neurovascular, focally demyelinating disorder of the root entry zone; its response to sodium-channel blockers and not to analgesics follows from the mechanism. | Pathogenesis, diagnosis and management of trigeminal neuralgia: narrative review, 2025 · The molecular basis and pathophysiology of trigeminal neuralgia | General neurology — a direct FMF–trigeminal neuralgia link is not established; nothing on her 2020 MRI reports the trigeminal root |
| The neurological reach of FMF Chapters 1, 7 | Neurological manifestations are reported across FMF cohorts at rates above background, supporting the plausibility of nervous-system involvement without specifying which nerves. | Prevalence of neurological manifestation in FMF: systematic review and meta-analysis, Neurol Sci 2025 | Meta-analysis — supports plausibility, not this patient’s mechanism |
| The timing Chapter 7 | Two findings arriving in the two years after a fever of unknown origin found CRP raised on every draw, and worse by her account in the weeks the markers were high, are better explained together than separately. | The module’s own correlation across the neurologist’s and audiologist’s folders (Jun 2026) | The case’s own reading — a correlation across folders, not a test; her account is the only account |
| What was spared Chapters 1, 3, 4, 5, 7 | Ten normal cranial nerves, a clean optic nerve and a quiet vestibular division argue against a broad failure or a central white-matter process and for a process reaching specific, vulnerable sites. | The June 2026 cranial-nerve exam (the textbook A&P 2e §16.3 for the tests); the 2020 MRI report | Clinical reasoning on the case’s own exam — the exam is the case’s own detail |
| Cytokines and the inner ear Chapter 6 | The stria vascularis and cochlear hair cellsThe basic structural and functional units of life. are metabolically demanding, poorly supplied and non-regenerating, and inner-ear inflammation is a recognized route to sensorineural loss in autoinflammatory disease generally. | Standard inner-ear physiologyThe study of how the body functions. (the course textbook names neither endolymph nor the stria vascularis); autoinflammatory hearing-loss reviews | General physiology and general autoinflammatory evidence — no cytokine has ever been measured in her inner ear |
| The special senses themselves Chapters 1–7 | Receptor classification, taste and smell, the eye and retina, hearing and equilibrium, and the cranial-nerve exam are taught from the course textbook, with anything added beyond it marked where it appears. | the textbook A&P 2e §14.1, §14.2, §13.4, §16.3 (CC BY-NC-SA 4.0); standard A&P texts for the marked values | Textbook anatomyThe study of the structure of the human body. and physiology — not evidence about Stina |
Think · not graded
Which rows are FMF cohort evidence, which are general neurology or physiology, which are the case’s own reading — and which thing was never measured in Stina at all?
The true/false spot-check for this prompt is in production.
How to read the strength column
Guideline — an expert panel pools many studies into practice recommendations. Trial — patients assigned to a treatment and compared. Cohort — a group of patients measured the same way; good for how often something happens. Case series or review — several patients described together, or the settled background. General mechanism — textbook physiology rather than a study of this disease. Case report — one striking patient; it shows that something can happen, not how often.
Every Evidence page in the course uses the same labels.
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Lived experience and evidence
A note on validity — from the author
Stina is not a composite. Stina is me. The stab of face pain at a cold breeze, the high voices going quiet, the bladderA muscular organ that stores urine before excretion. that stopped reporting for duty — those are mine, and each was sent to a different specialist as if it stood alone. This page holds both truths at once. The lived experience is real; the research support is what earns the case a place in a science course, and where a step is general neurology or an unproven link, the table says so. If you are a clinician who arrived from a patient, treat this as a validated starting point that respects the patient’s experience and then hands you the literature.
This page holds both truths at once. The lived experience is real; the research support is what earns the case a place in a science course, and the steps that rest on this case’s own narrative are flagged. If you are a clinician who arrived from a patient, treat this as a validated starting point that respects the patient’s experience and then hands you the literature.
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Beyond Stina — other reasons an eye’s pressure spikes, a face nerve screams, a hearing loss arrives early, or a sense goes missing
Trigeminal neuralgia, early sensorineural hearing loss, tinnitus, anosmia and vertigo each have a long differential; almost none of it is a periodic fever. The point of this page is not that every cranial neuralgia is FMF — it is that a sensory finding has an anatomical address, and an address can be compared with the next folder.
Posner-Schlossman syndrome (glaucomatocyclitic crisis)
Recurrent one-sided pressure spikes with a mild trabeculitis; in regions where it is common, about half of cases carry cytomegalovirus in the aqueous, found by PCR; an HLA type is over-represented; treated attack by attack, with a quarter of patients left with optic-nerve damage.
Acute angle-closure glaucoma
The other way an eye’s pressure spikes — the drainage angle closes shut; a painful red eye with a fixed mid-dilated pupil, halos and vomiting; an emergency, and the opposite mechanism to an open-angle trabeculitis.
Uveitis with a systemic cause
Anterior uveitis in ankylosing spondylitis, Behçet’s, sarcoidosis, juvenile arthritis and the periodic fevers — the reason an eye doctor asks about joints, mouthThe opening of the digestive tract where food enters and mastication begins. ulcers and fevers before writing “idiopathic.”
Steroid-induced cataract and ocular hypertension
Long courses of steroid drops, inhalers or tablets cloud the lens from the back (posterior subcapsular) and raise the pressure in “steroid responders” — the cost side of every anti-inflammatory drop.
Classical trigeminal neuralgia (neurovascular compression)
A small artery looping against the root entry zone, the usual cause; MRI can show the loop; microvascular decompression is the surgical answer when drugs fail.
Multiple sclerosis
Demyelinating plaques at the trigeminal root entry zone are a recognized cause of trigeminal neuralgia in younger patients, often bilateral; MS was never raised on any of Stina’s reports.
Noise-induced hearing loss
The commonest cause of an early high-frequency dip: outer hair cells at the baseA substance that accepts hydrogen ions (H⁺) or releases hydroxide ions (OH⁻). destroyed by loud sound, with a characteristic notch around 4 kHz.
Ototoxic drugs
Aminoglycoside antibiotics, cisplatin and high-dose aspirin damage hair cells from the base forward — a drug history belongs on every audiogram.
Presbycusis
Age-related high-frequency loss, usually from the sixties on; “earlier than age explains” is the phrase that moves a patient out of this category.
Ménière’s disease
Excess fluid in the labyrinth: episodic vertigo, a low ringing and a fluctuating low-frequency loss — hearing and balance together, the one vestibular disorder the textbook names.
Benign paroxysmal positional vertigo
Otoliths loose in a semicircular canal: brief spinning on rolling over in bed; the commonest vertigo and the easiest to fix, with a repositioning maneuver.
Autoimmune inner-ear disease and Cogan syndrome
Rapidly progressive, often bilateral sensorineural loss that responds to steroids; Cogan adds eye inflammation — the inner ear as an immune target in its own right.
Post-traumatic and post-viral anosmia
Olfactory threads sheared at the cribriform plateHorizontal part of ethmoid with many tiny holes for olfactory nerves; beside crista galli., or an epithelium stripped by a virus; temporary if the scaffold survives, permanent if it does not.
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Reliable information — a link library
Rare-disease organizations
NORD — National Organization for Rare Disorders
Plain-language disease reports and patient organizations.
NIH GARD — Genetic and Rare Diseases Information Center
The NIH rare-disease reference, with a live help line.
Orphanet
The European rare-disease encyclopedia; look up a syndrome by its signsObjective clinical findings observable by a provider (e.g., edema, fever)..
MedlinePlus Genetics
Gene and condition pages written for patients.
Infevers — the MEFV variant registry
Every reported MEFV and LPIN2 variant, with its classification.
FMF, the eye, the cranial nerves and the inner ear
NIAMS — Familial Mediterranean Fever
The NIH institute’s patient page.
NIDCD — Hearing, balance, taste and smell
The NIH institute for the senses this module teaches; patient pages on sensorineural loss, tinnitus and anosmia.
NINDS — Trigeminal neuralgia fact sheet
The NIH neurology institute’s page on the diagnosis, its mechanism and its drugs.
Vestibular Disorders Association
Patient-facing explanations of vertigo, BPPV and Ménière’s disease.
Autoinflammatory Alliance
Patient organizationThe structured arrangement of biological systems. for the periodic fever syndromes, with a symptom-by-symptom guide.
Glaucoma Research Foundation
Patient-facing pages on eye pressure, the drainage angle, the drops and their side effects.
Links checked September 2026.
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References
1. Cochlear involvement in familial Mediterranean fever: a new feature of an old disease. 2011.
2. Evaluation of hearing in patients with familial Mediterranean fever. 2013.
5. Pathogenesis, diagnosis, and management of trigeminal neuralgia: a narrative review. 2025.
6. The molecular basis and pathophysiology of trigeminal neuralgia. 2022.
7. Sensorineural hearing loss in autoinflammatory disease — review.
8. Yazici A, et al. Ophthalmic manifestations in familial Mediterranean fever: a case series of 6 patients. 2014.
9. Fonollosa A, et al. Update on ocular manifestations of the main monogenic and polygenic autoinflammatory diseases. Frontiers in Ophthalmology 2024.
11. StatPearls: Posner-Schlossman syndrome (glaucomatocyclitic crisis).
12. EULAR/PReS recommendations for the management of familial Mediterranean fever: 2024 update.
13. GeneReviews: Familial Mediterranean Fever.
14. the textbook, Anatomy and Physiology 2e, §14.1 (sensory perception), §14.2 (central processing), §13.4 (the peripheral nervous systemPNS All nervous tissue outside the CNS; includes nerves and ganglia. and the cranial nerves), §16.3 (the cranial nerve exam). Access for free at https://openstax.org/books/anatomy-and-physiology-2e/pages/1-introduction (CC BY-NC-SA 4.0).
Standing reference anchors: EULAR/PReS FMF management: 2024 update · GeneReviews: FMF · Infevers — MEFV registry
Next · Module 13
The Endocrine System
Three sense organs reached, ten cables spared, and a tide that matches the calendar. The Endocrine module follows the same headRounded proximal end that fits into the acetabulum of the hip bone. office down its other route — hormones in the blood instead of axons — and meets the flat cortisolA glucocorticoid involved in stress response, metabolism, and immune regulation. rhythm, the wandering calcium and the low vitamin D that sat in Stina’s folders all along.
Reliable information on rare diseases
NORD · NIH GARD · Orphanet · MedlinePlus Genetics: FMF · FMF & AID Global Association · Autoinflammatory Alliance · Global Genes · Amyloidosis Foundation
Stina has one rare disease. In the United States, about 1 in 10 people live with one of the more than 7,000 known rare diseases. These organizations are where patients, families and clinicians go for trustworthy information.
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List of terms
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- anatomy
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- base
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