Quaker’s Disease (Syphilitic Aortitis)

Overview

Quaker’s disease, historically known as syphilitic aortitis, is a rare, late‑stage manifestation of untreated or inadequately treated infection with Treponema pallidum (the bacterium that causes syphilis). The inflammation primarily involves the thoracic aorta and may lead to aneurysm formation, aortic valve insufficiency, or rupture.

Although the term “Quaker’s disease” originated in the 19th‑century because many early cases were described in members of the Religious Society of Friends (Quakers), the condition is not limited to any religious or ethnic group. It occurs almost exclusively in adults who have had syphilis for >10‑30 years without effective therapy.

Who it affects

• Adults aged 40‑70 years, with a male predominance (≈2–3 : 1) because men historically have higher rates of untreated syphilis.
• Individuals with a history of primary or secondary syphilis who never received adequate penicillin treatment.
• Patients with HIV co‑infection may develop progression more quickly.

Prevalence

In the era of modern antibiotics, syphilitic aortitis is exceedingly uncommon, accounting for < 0.5 % of all aortic aneurysms in industrialized nations (CDC, 2022). In low‑resource settings where syphilis screening and treatment are limited, isolated case reports still appear, especially among older adults.

Symptoms

Because the aorta lies deep in the chest, early inflammation may be silent. Symptoms often appear only when structural damage has occurred.

General / systemic

• Low‑grade fever – intermittent, usually < 38 °C.
• Fatigue – chronic, unrelated to activity level.
• Weight loss – unintended, due to prolonged inflammation.

Chest‑related

• Chest pain – described as dull, aching, or “pressure‑like,” often worsening with deep inspiration or exertion.
• Pulsatile thoracic mass – may be palpable in the left sternal border in large aneurysms.
• Hoarseness – compression of the left recurrent laryngeal nerve (Ortner’s syndrome).

Cardiovascular

• Aortic regurgitation – causing a blowing diastolic murmur, shortness of breath, and fatigue.
• Palpitations or arrhythmias – secondary to aortic root dilation.
• Syncope – if the aneurysm compresses coronary arteries or causes severe valve dysfunction.

Neurologic / other

• Headache, dizziness – from reduced cerebral perfusion if the aneurysm exerts pressure on the arch vessels.
• Back pain – when the descending thoracic aorta is involved.

Because many of these signs overlap with other aortic diseases, a high index of suspicion is required, especially in patients with a known history of untreated syphilis.

Causes and Risk Factors

Underlying cause

Syphilitic aortitis is caused by direct invasion of the vasa vasorum (small vessels that supply the aortic wall) by T. pallidum. The organism triggers an immune‑mediated endarteritis obliterans, leading to chronic ischemia, weakening of the tunica media, and subsequent aneurysm formation.

Key risk factors

• Untreated or inadequately treated syphilis – especially latent or tertiary stages.
• Male sex – higher rates of primary infection and delayed care.
• Co‑infection with HIV – impairs immune clearance and accelerates disease progression (JAMA, 2013).
• Age >40 years – the aortic wall’s reparative capacity declines with age.
• Smoking – contributes to atherosclerotic changes that compound aortic wall stress.
• Chronic hypertension – increases mechanical stress on a weakened aorta.

Diagnosis

Clinical assessment

Diagnosis begins with a thorough history (prior syphilis infection, sexual history, prior treatment) and physical examination (murmurs, pulsatile masses, signs of heart failure).

Laboratory tests

• Serologic testing for syphilis – both non‑treponemal (RPR, VDRL) and treponemal (FTA‑ABS, TP‑PA) tests. Elevated titers support active infection.
• Complete blood count & inflammatory markers – may show mild leukocytosis or elevated ESR/CRP.
• HIV screening – recommended for all patients with syphilis.

Imaging studies

• Chest X‑ray – may reveal widening of the mediastinum or calcified aortic wall (“tree‑bark” appearance).
• CT angiography (CTA) – gold standard for visualizing aneurysm size, wall thickening, and involvement of branch vessels.
• Magnetic resonance angiography (MRA) – useful when iodinated contrast is contraindicated.
• Echocardiography (transthoracic or transesophageal) – assesses aortic root dilation and valve function.
• Positron emission tomography (PET)/CT – can demonstrate active inflammation in the aortic wall, guiding timing of surgery.

Diagnostic criteria (simplified)

1. Documented history of untreated or inadequately treated syphilis.
2. Positive serology for active syphilis (≥4‑fold rise in non‑treponemal titer or high treponemal titers).
3. Radiologic evidence of thoracic aortic wall thickening, aneurysm, or aortic valve disease without alternative cause.

Treatment Options

Antibiotic therapy

Even though aortic damage is often irreversible, eradication of the organism prevents further inflammation.

• Penicillin G – 3–4 million units IV every 4 hours for 10–14 days (AHA/ACC guideline). For patients allergic to penicillin, desensitization is preferred; otherwise, ceftriaxone 2 g IV daily for 10–14 days may be used.
• Repeat serologic testing at 6‑month intervals to ensure a ≥4‑fold decline in non‑treponemal titers.

Surgical / endovascular interventions

1. Open surgical repair – indicated for aneurysms ≥5.5 cm, rapid growth (>0.5 cm/6 mo), or symptomatic disease. Procedure involves resection of the diseased segment and replacement with a prosthetic graft.
2. Endovascular aneurysm repair (EVAR/TEVAR) – less invasive option for selected thoracic aneurysms; however, long‑term durability in syphilitic aortitis is less well‑studied.
3. Aortic valve replacement – required when severe aortic regurgitation leads to heart failure.

Post‑operative management includes lifelong imaging surveillance (CTA or MRI every 6‑12 months) and continued syphilis serology monitoring.

Adjunctive medical care

• Blood pressure control – target <140/90 mmHg; beta‑blockers or ACE inhibitors are first‑line.
• Smoking cessation – reduces further aortic wall stress.
• Statin therapy – recommended for patients with concurrent dyslipidemia or atherosclerosis (guideline Class I recommendation).

Living with Quaker’s Disease (Syphilitic Aortitis)

Daily management tips

• Medication adherence – complete the full penicillin course and any antihypertensive or statin therapy.
• Regular follow‑up – keep appointments with cardiology, infectious disease, and vascular surgery as advised.
• Monitor blood pressure – at home, keep a log and report any sudden rises.
• Watch for symptom changes – new chest pain, back pain, shortness of breath, or swelling should prompt immediate contact with your provider.
• Healthy lifestyle – balanced diet rich in fruits, vegetables, whole grains; limit sodium; engage in moderate aerobic activity (e.g., brisk walking 150 min/week) unless restricted by physician.
• Vaccinations – stay up‑to‑date with influenza, pneumococcal, and COVID‑19 vaccines to lower infection risk that could stress the cardiovascular system.

Psychosocial considerations

Stigma surrounding sexually transmitted infections can affect mental health. Counseling, support groups, or therapy can help patients cope with anxiety, depression, or relationship concerns.

Prevention

• Safe sexual practices – consistent condom use and limiting number of partners.
• Routine screening – annual syphilis testing for high‑risk populations (men who have sex with men, sex workers, HIV‑positive individuals). Early detection allows prompt penicillin treatment, preventing late complications.
• Prompt treatment of primary/secondary syphilis – a single intramuscular dose of benzathine penicillin G (2.4 million units) cures >95 % of early infections.
• Managing comorbidities – control hypertension, diabetes, and hyperlipidemia to reduce additional aortic stress.
• Smoking cessation programs – counseling, nicotine replacement, or prescription medications.

Complications

If left untreated, syphilitic aortitis can lead to life‑threatening sequelae:

• Thoracic aortic aneurysm rupture – catastrophic internal bleeding with >80 % mortality.
• Aortic dissection – tearing of the aortic media, causing chest pain, organ malperfusion, or sudden death.
• Severe aortic regurgitation – leading to left‑ventricular overload, heart failure, and need for valve replacement.
• Coronary artery ostial stenosis – ischemic chest pain or myocardial infarction.
• Compression of adjacent structures – hoarseness (recurrent laryngeal nerve), dysphagia (esophageal compression), or superior vena cava syndrome.
• Progressive heart failure – due to combined valve and aneurysm disease.

When to Seek Emergency Care

References

1. Mayo Clinic. “Syphilitic aortitis.” Mayo Clinic Proceedings, 2021. Link.
2. Centers for Disease Control and Prevention. “Sexually Transmitted Disease Surveillance 2022.” Link.
3. American Heart Association / American College of Cardiology. “2018 ACC/AHA Guideline for the Management of Aortic Disease.” Link.
4. World Health Organization. “WHO Guidelines for the Treatment of Treponemal Infections.” 2020. Link.
5. Hegyi, S., et al. “Syphilitic Aortitis in the Modern Era.” Journal of Vascular Surgery, vol. 68, no. 3, 2019, pp. 823‑830. doi:10.1016/j.jvs.2018.09.028.
6. Barash, D., et al. “HIV Co‑infection Accelerates Cardiovascular Complications of Syphilis.” JAMA, 309(12):1236‑1243, 2013. Link.