Which is not major rheumatic fever?
**Question:** Which is not major rheumatic fever?
A. Sydenham's Chorea
B. Reiter's Syndrome
C. Behcet's Disease
D. Giant Cell Arteritis
**Core Concept:** Rheumatic fever is a consequence of Group A beta-hemolytic Streptococcal (GABHS) infection, particularly in the throat (pharyngitis). When GABHS remains untreated, it triggers an immune response leading to rheumatic fever. Major manifestations of rheumatic fever include carditis, chorea, Reiter's syndrome, and Behcet's disease.
**Why the Correct Answer is Right:** Giant cell arteritis (GCA) is not a major rheumatic fever manifestation because it primarily affects the elderly (usually over 50 years old) and is characterized by temporal artery inflammation. Unlike rheumatic fever, GCA does not have carditis, chorea, or Reiter's syndrome as part of its clinical presentation.
**Why Each Wrong Option is Incorrect:**
A. Sydenham's Chorea (also known as St. Vitus Dance) is a neurological manifestation of rheumatic fever, characterized by involuntary, irregular movements due to carditis.
B. Reiter's Syndrome is a combination of Reiter's triad (urethritis, conjunctivitis, and arthritis) and is a manifestation of rheumatic fever, particularly carditis.
C. Behcet's Disease is a systemic vasculitis affecting various vessels, primarily seen in the Middle East, South East Asia, and parts of the Mediterranean. It is not a manifestation of rheumatic fever, as it affects younger individuals (usually under 40 years old) and has characteristics distinct from rheumatic fever, such as oral ulcers, genital ulcers, and eye lesions.
**Clinical Pearl:** Giant cell arteritis (GCA) is a differential diagnosis to consider in elderly patients presenting with headache, scalp tenderness, and visual symptoms, while Sydenham's Chorea is essential to recognize in patients with rheumatic fever, particularly those with carditis. Understanding the differences between rheumatic fever manifestations and GCA helps in early diagnosis and appropriate management, preventing complications and long-term sequelae.