TITLE: Connective Tissue
Diseases
SOURCE: Grand Rounds Presentation, UTMB, Dept. of Otolaryngology
DATE: February 16, 2000
RESIDENT PHYSICIAN: Edward Buckingham, M.D.
FACULTY PHYSICIAN: Byron J. Bailey, M.D.
SERIES EDITOR: Francis B. Quinn, Jr., M.D.
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Introduction
Connective tissue diseases, also referred to in the past as collagen vascular diseases and autoimmune disease, are among the least understood entities in medicine. Great strides toward understanding of the human immune system have occurred in the last 20 years, however, the cause of these diseases is still not understood. These syndromes are difficult to diagnose because many of their symptoms are nonspecific and the signs and symptoms tend to overlap. Additionally, they lack specific laboratory and pathologic tests to confirm the clinical suspicion. The common histiologic feature of this group of diseases is widespread inflammatory damage to connective tissues and blood vessels and deposition of fibrinoid material. The location of these inflammatory changes and the pattern of organ involvement leads to the clinical disease designations.
The immune system development requires the maturation and differentiation of a lymphoid stem cell that originates in the bone marrow. This stem cell line gives rise to a variety of subpopulations: the B cell, a lymphocyte maturing under the control of the bone marrow itself; the T cell, a lymphocyte developing under the influence of the thymus; the macrophage or monocyte; and a minor population of lymphocytes called NK cells. These cells can be identified by their specific cell surface characteristics. The immune system is designed to respond to an antigen that is taken up and presented by macrophages to T and B cells that then produce chemical mediators and antibodies in response to the antigen. The connective tissue diseases are believed to develop due to an abnormal interaction of the individuals own immune system to "self" antigens. Three theories exist to explain how this comes about. The antigen may have been sequestered, or hidden, from the immune system during embryogenesis, when the immune system was "learning" what was self and what was foreign. If this antigen is later exposed, it may elicit an immune response as a foreign antigen. Another possibility is that an exogenous antigen may be sufficiently foreign to elicit an immune response, but similar enough to a self-antigen to allow cross reactivity of antibody. A third theory proposes that a self-antigen may be altered by, for example, a viral infection, causing it to be perceived as foreign. Having reviewed some of the basic ideas of immunity, several connective tissue diseases as well as vasculitides will be presented.
Systemic Lupus Erythematosus
General
Head and Neck Manifestations
Treatment
Diagnostic criteria for SLE

From Bailey’s H&N Surgery Second Edition
Rheumatoid Arthritis
General
Head and Neck Manifestations
Treatment
Diagnostic Criteria for Rheumatoid Arthritis

From Bailey’s H&N Surgery second edition
Sjogren’s Syndrome
General
Head and Neck Manifestations
Treatment
Diagnostic criteria for Sjogren’s Syndrome

From Bailey’s H&N Surgery Second Edition
Scleroderma
General
Head and Neck Manifestations
Treatment
Polymyositis and Dermatomyositis
General
Head and Neck Manifestations
Treatment
Relapsing Polychondritis
General
Head and Neck Manifestions
Treatment
Mixed Connective Tissue Disease
General
Head and Neck Manifestations
Treatment
Vasculitides
Vasculitis is the inflammation and necrosis of blood vessels induced by immunologic mechanisms. Any blood vessel can be affected, therefore, the clinical manifestations of vasculitis may be extremely diverse, and different syndromes may overlap considerably. Confusion of clinical signs and symptoms, difficulties in pathologic categorization and uncertainty as to cause or pathogenesis has made standard classification difficult. The following table presents one classification scheme.

From Campbel et. al. Head and Neck Manifestations of Autoimmune Disease Am. J. of Otolaryngol 4:204,1983
The pathogenesis of most forms of vasculitis is unclear. Multiple mechanisms are probably involved including deposition of antibody-antigen-complement in vessel walls, and antigen deposition triggering lymphocytic reaction and grannuloma formation.
Clinically, vasculitis is characterized by multisystem disease. Vasculitis gives rise to symptoms because of obliterative narrowing of vessels resulting in end-organ ischemia and dysfunction. It is unusual for a vasculitic process to affect only one organ system. Specific diagnosis can only rarely be made on clinical grounds alone, and routine or even specialized serologic testing yields a specific diagnosis in only a minority of cases. In most instances, it is necessary to biopsy tissue in order to make a diagnosis.
Hypersensitivity Vasculitis
General
Head and Neck Manifestations
Treatment
Polyarteritis Nodosa
General
Head and Neck Manifestations
Treatment
Churg-Strauss Syndrome (allergic angiitis and granulomatosis)
General
Head and Neck Manifestations
Treatment
Wegener’s Granulomatosis
General
Head and Neck Manifestations
Treatment
Giant Cell Arteritis (temporal arteritis)
General
Head and Neck Manifestations
Treatment
Polymyalgia rheumatica
Behcet’s Disease
Other associated findings and treatment
Cogan’s Syndrome
Kawasaki Disease
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Posted 02/22/2000