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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"This material was prepared by resident physicians in partial fulfillment of educational requirements established for the Postgraduate Training Program of the UTMB Department of Otolaryngology/Head and Neck Surgery and was not intended for clinical use in its present form. It was prepared for the purpose of stimulating group discussion in a conference setting. No warranties, either express or implied, are made with respect to its accuracy, completeness, or timeliness. The material does not necessarily reflect the current or past opinions of members of the UTMB faculty and should not be used for purposes of diagnosis or treatment without consulting appropriate literature sources and informed professional opinion."

 

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


Bibliography

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Doig JA, Whaley K, Dick WC, Nuki G, Williams J, Buchanan WW. Otolaryngological aspects of Sjogren’s syndrome. BMJ 1971;4:460.

Fauci AS, Haynes BF, Katz P, Wolff SM. Wegener’s granulomatosis: prospective clinical and therapeutic experience with 85 patients for 21 years. Ann Intern Med, 1983;98:76.

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Olson KD, Nell HB, DeRemee RA, et al. Nasal manifestations of allergic granulomatosis and angiitis. Otolaryngol Head Neck Surg 1980;88:85.

Spalton DJ, Atlas of Clinical Ophthalmology, Mosby, 1984.

Standefer JA, Mattox DE. Head and neck manifestations of collagen vascular diseases. Otolaryngol Clin North AM, 1986;9:181.

Vitali C, Bombardieri S, Moutsopoulos HM, et al. Preliminary criteria for the classification of Sjogren’s syndrome. Arthritis Rheum, 1993;36:340-347.


Posted 02/22/2000