Chronic Articular Rheumatism,

synonymous with rheumarthritis chronica, rheumatisme articulaire chronique simple (Besnier), polyarthritis synovialis chronica (Heuter), is defined here as a chronic idiopathic inflammation of one or a few articulations, which is more prone to become fixed than the acute form, and which, notwithstanding its protracted duration, produces no profound structural alterations in the joints.

ETIOLOGY.—It may be the direct sequel of a single attack or more commonly of several attacks, of acute, or more especially of subacute, articular rheumatism. But it is generally a primary affection, occurring in persons who have not had either acute or subacute rheumarthritis, yet owning the same causation as these, and occasionally in its course exhibiting acute or subacute symptoms. The specially predisposing conditions are inheritance; repeated attacks of subacute or acute articular rheumatism, which in accordance with general laws impair the resisting power of the affected joints; prolonged residence or employment in cold, damp, or wet rooms or localities; repeated exposure to bleak, cold currents of air or to frequent wettings of the body or lower limbs. For these reasons it is most common amongst the poor, who are especially exposed to the influences just mentioned; and amongst them cellar-men and sailors, washerwomen and maid-servants, are very liable to the disease. It is chiefly an affection of advanced life, or at least of mid-age, and is rare in youth. The first attacks, and especially exacerbations, are apt to be induced by the direct action of a draught of cold air or by unusual exposure to cold and damp air, especially when the body has been fatigued or overheated. In many cases no distinct exciting cause can be traced.

The morbid anatomy of simple chronic articular rheumatism will vary with the severity and duration of the disease. The alterations are such as chronic inflammation of a non-suppurative character might be expected to produce in the joints by one who had learned those characteristic of acute rheumarthritis. In the simple chronic form the proliferating process involves chiefly the synovial membrane, the capsular and other ligaments, and the periarticular tissues; to a less degree the cartilages, and to a much less degree, and exceptionally, the osseous surfaces. The synovial membrane is thickened, slightly injected, and its fringes hypertrophied and more vascular than normally. Little fluid usually exists in the joint unless during an exacerbation, when a moderate amount of thin, cloudy serum may be present; generally only a trace of thick, turbid fluid, containing oil-globules, and in severe cases débris of the cartilages, but no pus, is found. The fibrous capsule and ligaments become thickened, dense, and stiffened by hyperplasia; and sometimes the adjacent tendons and their sheaths, the fasciæ and aponeuroses, undergo similar alterations, so that the movements of the joints become seriously interfered with. In some cases this irritative hyperplasia specially involves these periarticular fibrous structures, and these, undergoing retraction, produce marked deviations, subluxations, and deformities of the articulations very like those observed in rheumatoid arthritis, although the osseous components of the joints are unaffected. Jaccoud gave to such cases the title of chronic fibrous rheumatism. It is worth noting that Jaccoud's, Charcot's, and Rinquet's cases of so-called "chronic fibrous rheumatism" developed out of acute articular rheumatism, while Besnier's was primarily chronic. In simple chronic rheumatism, if protracted, the cartilages also proliferate, lose their semi-transparency and polish, and become opaque and white; they are often rough and traversed by fissures, and occasionally present erosions; and these erosions are either naked or covered with a layer of newly-formed connective tissue, which may occasionally produce fibrous adhesions between the articular surfaces. Points of calcification occur in the cartilages and tendons in very chronic cases. Instances are observed in which the bones exhibit, to a slight degree, the alterations found in rheumatoid arthritis, and are probably transitional between the two affections. The muscles which move the affected articulations in severe cases are often atrophied, and the wasting imparts to the joints an appearance of considerable enlargement.

Vide Jaccoud, Clin. Méd. de la Charité, 23e Leçon, Paris, 1867.

Besnier, Dictionnaire Encyclopéd., etc., t. iv., p. 680 et seq.

Du Rheum. Artic. Chronique, etc., par Martial Rinquet, Thèse, Paris, 1879, pp. 28-33.

SYMPTOMS AND COURSE.—Simple chronic articular rheumatism presents many varieties. In the milder forms the patient experiences trifling or severe pain in one, or less frequently in two or more, joints, more especially in the knee or shoulder, or both, attended with want of power in the member or with stiffness in the affected articulation. The pain frequently is likewise felt in the soft parts, muscular and tendinous, near the joints, and is usually increased by active or passive movement; it is not always accompanied by tenderness, and rarely with local elevation of temperature or swelling. The wearying aching in the joint is of an abiding character, but is very liable to exacerbations, especially at night; and these come on just before atmospheric changes, such as a considerable fall of temperature, the approach of rain, variations in the direction of the wind, etc., and they usually continue as long as the weather remains cold and wet. A very common symptom is a creaking or a grating which may be felt and heard during the movements of the joint.

The above symptoms may rarely prove more or less constant by night and day for years, but far more frequently, at least at first, they last an indefinite period and disappear to recur again and again, especially in the cold and changeable seasons of the year. Although in the earlier attacks, and often for a long time, no alteration of structure is perceptible in the painful joints, yet in some instances slight effusion into the articulation may be observed during the exacerbations, or the capsule and ligaments may at length become slightly thickened, or the muscles may waste and produce an apparent enlargement of the joint; and this prominence of the articular surfaces may be increased by retraction of the tendons and aponeuroses—a condition which causes real deformities (deviations, subluxations, etc.) of the articulation and impairs more or less its movements. In very chronic cases a fibrous ankylosis may be established.

These last-mentioned conditions often entail great and long-continued suffering, and may even cause some anæmia and general debility; but very frequently the general health and vigor continue good, notwithstanding the permanent impairment of the functions of one or several of the large articulations, and the liability to exacerbations often amounting to attacks of subacute rheumarthritis from changes in the weather, fatigue, or exposure.

Besides the above varieties may be mentioned a not infrequent one consisting of a series of attacks of subacute articular rheumatism recurring at short intervals, involving the same joints, and attended with slight elevation of temperature, febrile urine, perspiration, and moderate local evidences of synovitis, heat, pain, tenderness, swelling, and effusion into the affected joints. This is an obstinate variety, and is often associated with rheumatic pain in the muscles and fibrous tissues of the affected member.

Simple chronic articular rheumatism, like the acute form, is most apt to affect the larger articulations, knees, shoulders, etc., but it frequently also involves the smaller ones of the hands and feet. Although usually polyarticular, it is prone to become fixed in a single joint, but even then it may attack several other articulations, and may migrate from one to another without damaging any.

The course of the disease is usually one of deterioration during persistent or recurring attacks, and in many cases the intervals of relief become shorter and less marked; the joints become weaker and stiffer; and although the pain may not increase and the general health may not be seriously impaired, yet the patients may continue for many years or the rest of their lives severe sufferers, unable to work, and often hardly able to walk even with the aid of a stick. Occasionally, after several years of pain and weakness, a sudden or slow improvement may set in and the patient become free from pain and lameness, and only experience some stiffness in the movements of the joints after several hours of rest, and slight thickening of the ligaments and capsule of one or more articulations. The duration of the disease is indefinite; the danger to life trifling.

The complications of simple chronic articular rheumatism are held by many, and especially by those who regard the disease as constitutional or diathetic, to be the same as those of the acute form, and that they may precede, follow, alternate, or occur simultaneously with the articular affection. All admit that they are observed much less frequently in the former than in the latter. Other pathologists either deny the occurrence of the visceral complications (Senator, Flint) or do not mention them (Niemeyer). It is not denied that cardiac disease may be found in chronic articular rheumatism which has succeeded the acute form, and which may then be referred to the acute attack. The tissue-changes then set up may not have produced at the time the murmurs indicative of endocarditis, but these tissue-changes may have ultimately roughened the endocardium, puckered a valve, or shortened its cords, so that cases of chronic articular rheumatism having a history of an acute attack cannot be safely included when inquiring into the influence of the chronic form upon the heart or other internal organ. Attention has not been sufficiently given to ascertain the frequency of the occurrence of these complications in primary chronic articular rheumatism, and reliable evidence is not at hand. It is not unlikely that the chronic form may slowly develop cardiac changes, as the acute form rapidly does; but when the advanced age of the persons most liable to chronic rheumatism is borne in mind, it must be admitted that valvular and arterial lesions (endarteritis) are observed at such periods of life independently of rheumatism, and referable to such causes as repeated muscular effort, strain, chronic Bright's disease, senile degeneration, etc. Somewhat similar observations are applicable to the attacks of asthma, of subacute bronchitis, of neuralgia, and of dyspepsia, which are frequently complained of by sufferers from simple chronic rheumarthritis. Such affections are common in elderly people in cold and damp climates; they may be mere complications rather than manifestations of rheumatism, or outcomes of the confinement and its attendant evils incident to chronic articular rheumatism, as is probably the relationship of the dyspepsia. There is no doubt of the frequent coexistence of muscular rheumatism with this variety.

DIAGNOSIS.—Simple chronic articular rheumatism may be confounded with rheumatoid arthritis, with the articular affections of locomotor ataxia and other spinal diseases, with chronic articular gout, with syphilitic and with strumous disease of the joints. The reader may consult the observations made on four of these affections in connection with the diagnosis of rheumatoid arthritis. A few additional remarks are called for in distinguishing chronic articular rheumatism from chronic articular gout, which is often a very difficult problem. Both are apt to be asymmetrical in distribution, to have paroxysmal exacerbations, to recur frequently without damaging the articulations, to have been preceded by acute attacks of their respective affections, and to be uncomplicated by endo- or pericarditis. But chronic rheumarthritis has no special tendency to attack the great toe; it is more persistent than gouty arthritis; it does not, even when of long standing, produce the peculiar deformities of the articulations or the visible chalk-like deposits in the ears or fingers observed in chronic gout. The etiology of the two diseases is dissimilar. There is no special liability to interstitial nephritis in articular rheumatism, nor is urate of soda present in the blood in that disease.

In chronic strumous or tubercular disease of a joint the youth, the personal and family history, and sometimes the evident defective nutrition, of the patient; the moderate degree of local pain compared with the considerable progressive and uniform enlargement of the joint; the evident marked thickening of the synovial membrane, either early or late according as the disease has originated in the synovial membrane or in the bones; the continuous course, without marked remissions or exacerbations, of the disease; the rarity with which more than one joint is affected; and the tendency to suppuration, ulceration, marked deformity, and final destruction of the joint,—will prevent the disease from being mistaken for chronic rheumatism.

The PROGNOSIS in simple chronic rheumarthritis is unfavorable as regards complete recovery, and it is chiefly while comparatively recent, and when the sufferer can be removed from the conditions productive of the disease, that permanent improvement, and sometimes cure, may be expected. As a rule, the disease once established recurs. It does not, however, endanger life.

TREATMENT.—All are agreed that hygienic treatment constitutes an essential, if not the most valuable, part of the curative and palliative management of chronic rheumarthritis. A dry and uniform climate is the most suitable, and there is much evidence in favor of a dry and warm rather than a dry and cold climate. Protection of the body against cold and damp by means of flannel next the skin, sufficient clothing, residence in dry and warm houses, etc., is of prime importance. In fact, all the known or suspected causes of the disease should be as far as possible removed.

The direct treatment of the disease resolves itself into general and local, and is essentially the same as that recommended for rheumatoid arthritis, to which subject the reader is referred. A few observations only need be made here. Although, like everything else in chronic rheumarthritis, it often fails, no single remedy has in the writer's experience afforded so much relief to the pain and stiffness of the joints as the sodium salicylate; and he cites with pleasure the confirmatory testimony of J. T. Eskridge of Philadelphia, of whose 28 cases 75 per cent. were decidedly benefited. Jacob of Leeds also reports some benefit in 75 per cent. out of 87 cases treated by the same agent. It must be given in full doses, and be persevered with. Salicylate of quinia should be tried if there be much debility or if the sodium salt fail. Propylamine or trimethylamine is deserving of further trial in this disease. From 100 to 200 grains are given in the day in peppermint-water. Iodide of potassium, cod-liver oil, arsenic, iodide of iron, and quinia are all and several remedies from which more or less benefit is derived in chronic articular rheumatism. The combination of iodide of potassium with guiaiac resin—gr. ij-iij of each three times a day in syrup and cinnamon-water—is sometimes very useful. The writer has no experience of the bromide of lithium (Bartholow). When the skin is habitually dry and harsh a dose of pilocarpine every other night for a few times will often prove very useful.

Phila. Med. Times, vol. ix. pp. 75-77, 1878, and The Medical Bulletin, Phila., July, 1879, pp. 44-48.

Brit. Med. Jour., ii., 1879, 171.

Cod-liver oil, iron, quinia, etc., the various forms of baths and mineral waters, electricity, and the several local measures recommended for the treatment of rheumatoid arthritis, are all occasionally very useful in, and constitute the appropriate treatment of, simple chronic articular rheumatism. The dietetic management of the two affections should be the same.