Part 13

The evidence in favor of the doctrine that true articular rheumatism transmits an hereditary tendency to rheumatoid arthritis does not appear to be conclusive, although it is highly thought of by those who regard the latter disease as a variety of rheumatism. Some considerations of an opposing character deserve mention. Acute articular rheumatism has very rarely passed continuously into rheumatoid arthritis, and very rarely has been followed at short interval by that disease; and in such exceptional cases the antecedent affection may have been really the acute form of rheumatoid arthritis, which closely resembles acute articular rheumatism. Trastour, Vidal, Charcot, and others admit that acute rheumatism can hardly be placed amongst the antecedents of the rheumatoid affection. Garrod with some others states that now and then acute rheumatism acts as an exciting cause of it, which appears to have been Fuller's view; he had repeatedly known it to commence apparently as a sequel of acute rheumatism. However, Ord met with a case in which the lesions of rheumatoid arthritis were present in a typical form in a patient who had mitral disease as a result of acute rheumatism, the arthritis having begun as a continuation of the acute attack.

That so common an affection as articular rheumatism should occur in the family or personal history of a patient the subject of the rheumatoid arthritis is not improbable; nasal catarrh and many other very common diseases must be frequent antecedents of the rheumatoid affection, yet are not causes of it. Much the same remarks apply to the view that gout in the parents may transmit a tendency to rheumatoid arthritis in the offspring. The experience of English physicians in this matter is hardly reliable, owing to the great prevalence of gout in England. In Canada and many parts of the United States, however, while gout is a rare disease, rheumatoid arthritis is a common one, and the writer has not found an intimate relationship to obtain between the two affections. It is not intended to deny that when the children of rheumatic or gouty parents fail in health owing to their inherited constitutional disease, they become liable to rheumatoid arthritis, for feeble health predisposes to that affection.

Finally, many of the difficulties connected with this subject are reasonably met by Hutchinson's doctrine that there exists a state of tissue-health which is transmissible by inheritance, which involves liability to inflammations of joints and fibrous structures, and upon this arthritic diathesis as a foundation may be built up, under the influence of special causes, a tendency to gout, rheumatism, or any one of their various modifications or combinations.

Hutchinson has demonstrated that gout is often followed by rheumatoid arthritis, the lesions characteristic of both affections coexisting in the same joint. Charcot and Cornil had previously observed the same {90} thing. Acute and perhaps chronic rheumarthritis have sometimes preceded rheumatoid arthritis. If a predisposition, inherited or acquired, to rheumatoid arthritis exist, the occurrence of gouty or rheumatic irritation in the joints may suffice to induce the peculiar form of disturbance characteristic of the rheumatoid affection, just as injuries sometimes develop the partial form.

There is a group of conditions affecting the sexual functions and organs of women which appear to be specially connected with the general peripheral form of rheumatoid arthritis. The disease follows pregnancy, and specially frequent pregnancies, protracted lactation, and various disorders of menstruation. The latter influence obtained in ten out of eleven instances of the disease met with in girls under eighteen by Fuller. The frequency of the disease about the period of the menopause has been already mentioned. Todd noticed its coincidence with dysmenorrhoea. Ord in an able and original paper has lately dwelt upon ovario-uterine disorder or irritation as a frequent active cause of the disease, having in his opinion met with 33 instances of the kind. The relationship between these various conditions of the functions and organs of generation and rheumatoid arthritis cannot be regarded as settled. Garrod supposed that such conditions, by causing debility, predisposed to the articular disease. Todd, an ardent humoralist, held the nexus between the two to be unhealthy secretions of the uterus, leading to blood impurity; while Ord has ably defended Remak's view that a direct influence of the nervous system is the real link of relationship. It seems necessary to remark that mere coincidence may play a large rôle in the explanation of many of these cases. In 17 at least of Ord's 33 cases the conditions stated by that author cannot safely be adduced as anything more; and it is probable that they would be found present in much the same proportion in any other chronic painful disease of women.

Scrofula and phthisis are regarded by Charcot, Cornil, and Garrod as frequent antecedents of rheumatoid arthritis: the first had several times seen white swelling in youth, followed by nodular rheumatism in later life; and Fuller found that 23 out of 119 victims of rheumatic gout had lost a parent or one or more brothers and sisters by consumption. Chlorosis has several times preceded rheumatoid arthritis. When the prevalence of scrofula, phthisis, and chlorosis is borne in mind, it will not appear strange that they should frequently be found amongst the antecedents of rheumatoid arthritis, without inferring any other relationship between them. Gonorrhoeal rheumatism has also occasionally preceded rheumatoid arthritis, but Ord and Hutchinson are probably correct in regarding that affection as a variety of rheumatoid arthritis.

Cold, especially when prolonged and associated with dampness, is commonly held to be the most common cause of general rheumatoid arthritis. A protracted residence in low, damp dwellings, deprived of the sun's rays and of a free circulation of air, is a condition thought most favorable to the provocation of this disease, perhaps years after the condition has been done away with.

{91} Poverty and all that it implies are at least frequent antecedents of the disease (hence one of its epithets, arthritis pauperum), as are other debilitating influences, such as night-watching, insufficient food, mental worry, grief, anxiety, etc. Be it remembered, however, that the disease is frequently observed in the well-to-do, who live in dry climates and warm houses, are well fed, and want for nothing; so that the external conditions first mentioned are not essential causes of the disease, and many of them may act merely as adjuvants.

Direct injury of a joint from a blow, a fracture, a whitlow, etc. may sometimes induce a local rheumatoid arthritis, which may subsequently become multiple and involve several articulations more or less symmetrically.

The partial form presents some peculiarities of causation--thus: it occurs chiefly in advanced life (senile arthritis), much less frequently in middle life, very exceptionally in the very young. Men are much more liable to it than women. It is chiefly this variety which follows injuries, blows, dislocations, pressure, etc., and the disease may then be limited to the injured joint and be monoarticular, or it may extend and become polyarticular, or rarely, as in Ord's case, even general. This monoarticular form appears to be sometimes induced by other local irritations of the articular structures than those following traumatic influences; and as foreign growths in joints and gouty irritation may respectively induce the lesions indicative of rheumatoid arthritis, so, it is probable, may simple chronic rheumatism; and this may be the true relationship existing between these several affections. It is doubtful at present whether purely local irritation or injury of a joint can originate the alterations belonging to rheumatoid arthritis--that is, in the absence of all predisposition to that disease or of the arthritic diathesis. Cold and dampness are generally admitted to be causes of the partial form, but the evidence on this point is not altogether satisfactory. It may be that chronic articular rheumatism is induced by the prolonged operation of damp cold, and that the prolonged rheumatic irritation, aggravated by constant use of the joint and by occasional violence, ultimately superinduces the profounder alterations characteristic of arthritis deformans. It appears highly probable that if the predisposition exist, any long-abiding irritation of a joint, whether the result of violence or disease, may ultimately originate the alterations of the cartilages and bones which obtain in rheumatoid arthritis.

As regards the etiology of Heberden's nodosities, and their relation to other affections of the joints, the following summary must suffice: They obtain chiefly in advanced life, but do occur rarely in the young; they are probably somewhat more frequent in women than in men; although more frequently seen in the upper classes, the poor are not exempt from them, no doubt because they are specially exposed to slight but oft-recurring injuries of their digits, such traumatism being an exciting cause of the disease, especially when confined to a single joint. The affection is sometimes hereditary; both it and the general or the partial forms of rheumatoid arthritis may coexist in the same family and even in the same person. The alterations in the joints are identical with those found in the general variety of rheumatoid arthritis, and exist without {92} deposits of urate of soda (Charcot). It resembles the general form of the disease just mentioned in its tendency to involve many symmetrical articulations at the same time, and the partial form in the rarity with which it extends beyond the joints first attacked. While Heberden's nodosities, as Haygarth taught, do occur independently of gout and the gouty habit, I believe with Begbie and Duckworth that in some persons they are evidences of gout or the gouty diathesis.

Quite recently a woman aged forty-eight consulted me with these nodosities beginning upon the last joint of the fingers, while she was the subject of vesico-renal irritation and was passing free uric acid in the urine. Hutchinson has twice seen them in combination with a peculiar insidious and painless inflammation of the iris and vitreous body, which occurs in the children of the gouty, yet such children have no deposits of lithates in their joints, nor any lithiasis, nor acute paroxysms of true gout, and he considers that "the last joint arthritis is to be regarded as in part gouty, and in part a kind of articular chilblain."

Lastly, in some instances they are no doubt the hybrid offspring of an inherited tendency to both gout and rheumatoid arthritis.

No more important principle in pathology exists than has been of late years insisted upon, especially by Jonathan Hutchinson and in his recent lecture by Sir James Paget--to wit, that "by inherited dispositions, accumulating and combining or converging in definite proportions, new diseases may be developed and old ones be variously modified."

The pathogenesis of rheumatoid arthritis is the subject of differences of opinion very like those existing in regard to acute articular rheumatism. The weight of evidence is in favor of its diathetic relationship to rheumatism; and the doctrine of an arthritic diathesis and of the operation of the causes of the disease through the nervous system appears to be specially applicable to it, with less difficulty than to acute rheumatism, and the probability of a specific germ being its true cause is very remote. What seems to be necessary in addition to the preceding is, that the causes shall be more persisting and oft-recurring, so as to maintain a prolonged local irritation of the articular tissues, or that the neuro-arthritic diathesis shall be highly developed. Under these conditions the prolonged or oft-repeated application of cold and damp to the peripheral nerves, severe or oft-repeated slight injuries to joints, urethral or ovario-uterine irritation, chronic gout or rheumatism, or even, exceptionally, an attack of the acute form of these diseases, may originate rheumatoid arthritis; and all wearing influences, such as anæmia, excessive menstruation, prolonged lactation, innutrition, failing health, mental anxiety, or shock, etc., act as adjuvants in the development, aggravation, and maintenance of the articular disease.

DIAGNOSIS.--It is perhaps not possible to distinguish with certainty either the acute or the chronic form of rheumatoid arthritis from subacute or chronic rheumarthritis respectively before the characteristic deformities of the former affections have appeared. Acute rheumatoid arthritis, which is comparatively rare, may be said to exist, rather than subacute {93} articular rheumatism, if the disease affect early and chiefly the smaller joints of the hands and feet alone or along with some of the larger articulations, especially the sterno-clavicular or the temporo-maxillary; if the effusion into the joints be abundant; if inflammation persist in the articulations first involved, notwithstanding the invasion of other joints; if the heart escape; if the patient be a female who is constitutionally delicate, or has borne children rapidly, or is the subject of disordered menstruation, or has been attacked soon after childbirth or during lactation;--finally, if, on cessation of the attack, one or more of the joints remain swollen and permanently enlarged and impaired in function. The coexistence of iritis, or a history of a previous attack of that disease not attributable to syphilis or gout, would strengthen the above view.

Precisely the same considerations serve to distinguish chronic general or polyarticular rheumatoid arthritis from chronic articular rheumatism, with the following qualifications: endo- or pericarditis is not of frequent occurrence in chronic rheumatism, so that this distinction is not available, and chronic rheumarthritis of long standing does sometimes impair the movements of the joints, and even produce slight alterations in them. However, it does not, as a rule, involve so many joints as rheumatoid arthritis; it is less symmetrical in its distribution, and much less prone to implicate the sterno-clavicular, the temporo-maxillary, or the vertebral articulations. Nor does it cause removal of the articular cartilage, enlargement of the heads of the bones, and the formation of osteophytes around them, and of loose bodies in the articulations, together with marked deformities and luxations of the joints. A history of a remote or recent attack of acute rheumarthritis or of chorea, or the presence of chronic valvular disease, would strongly indicate the simple rheumatic nature of the case.

The partial form of rheumatoid arthritis can with even less certainty than the general be distinguished from chronic articular rheumatism before the characteristic alterations of the joints have been developed, more especially as it is sometimes a consequence of gouty irritation and probably of chronic rheumatism. Chronic arthritis following a traumatic cause, and persisting obstinately in the injured joint is probably rheumatoid, if not strumous, gouty, or periarthritic.

But before definitely deciding it will be prudent to await the development of some of the characteristic alterations of structure appertaining to rheumatoid arthritis. An affection of the shoulder frequently occurs which resembles in many respects rheumatoid arthritis, and has been well described by Simon Duplay and W. Pepper. It usually follows an injury, such as contusion, sprain, etc., of the joint, but may be spontaneous; it is unattended by swelling or deformity. Its early symptoms are pain on pressure of the shoulder a little below the outer border of the acromion, and especially behind it and at the coracoid process, also about the insertion of the deltoid and below the acromion during movements of the joint, especially when the arm is raised from the side or rotated inwardly; early restriction of these movements, which increases till a fibrous ankylosis becomes established and scapula and humerus move together as one piece, motion between those bones no longer existing, and forcible attempts to produce it giving great pain, and sometimes producing {94} crepitus in or about the articulation; sometimes early numbness and pain down the member to the hand in the course of the ulnar, internal cutaneous, or the radial nerve; vicious and painful semiflexion of the elbow; after a time wasting of the group of muscles which move the shoulder-joint. Although usually monoarticular and of traumatic origin, I have seen it affect first one and then the other shoulder in the absence of any known injury, and beginning like a neuritis or a neuralgia of the scapulo-humeral nerves. Duplay, however, regards it as a periarthritis. It may be distinguished from the rheumatoid arthritis by the absence of effusion into or enlargement of the articulation, and of deformity of the bones; by the early restriction of the movements and the rapid development of adhesions which fix the articulation; and by the curability of the disease.

The articular affection of locomotor ataxia sometimes closely resembles monoarticular rheumatoid arthritis, but may be distinguished by its sudden invasion, often without pain or fever; the prompt development of a general and often enormous tumefaction of the entire member, with copious effusion into the joint; the early destruction of the articular cartilages, the rapid wearing away of the heads of the bones, and the proneness to spontaneous fracture of their brittle shafts; the prompt absorption of the articular effusion, followed by a relaxed state of the ligaments and a facility of dislocation; the early occurrence of the articular affection, when motor inco-ordination is scarcely developed, and its frequent association with the crises of ataxia or the presence of some of the other symptoms of that disease. The importance of these facts will be especially evident in those examples of ataxic articular disease in which, at an advanced stage, eburnation and deformity of the articular surfaces, with the formation of loose bodies and osteophytes, are observed, just as they are in arthritis deformans.

Articular disease closely allied to what occurs in locomotor ataxia is now and then observed in the early stages of progressive muscular atrophy, but while the large joints, more particularly the knee and the shoulder, suffer in the former affection, the phalangeal chiefly and the larger articulations more rarely are attacked in the latter. Of course the peculiar symptoms of progressive muscular atrophy coexisting with those of the articular affection would serve to distinguish the latter from rheumatoid arthritis.

It is often very difficult to say whether a given case is one of chronic rheumatoid arthritis or of chronic gout; and there is no doubt that in England, where gout prevails, it is not unfrequently associated with rheumatoid arthritis, sometimes preceding and even causing it, much more often following it, for the one does not exclude the other.

While rheumatoid arthritis most frequently begins in the hand, and is usually symmetrical and bilateral, gout commonly begins in the lower extremities, and especially in the metatarsal joint of the great toe, and of one foot only. Chronic gout is far more frequently preceded by attacks of acute gout than chronic rheumatoid arthritis is by the acute form of that affection; a history of inherited predisposition, of indulgence in the {95} use of wine, ale, porter, and of animal food, of deficient bodily exercise, with perhaps great mental occupation or anxiety, of recurring gouty dyspepsia or of a tendency to lithiasis, would indicate gout, while the absence of these and a history of frequent exposure to cold and wet, of injury to the joint, of previous exhausting disease or drain, of impaired health, debility, or poverty, would strongly imply rheumatoid arthritis. Gout is especially observed in males over thirty, and very rarely in children; general rheumatoid arthritis is chiefly a disease of females during menstrual life, and occasionally occurs in children of either sex.

The partial form is, like gout, chiefly a disease of men, but occurs generally at a more advanced age than gout. Even chronic gout is more or less paroxysmal, with distinct intermissions; chronic rheumatoid arthritis is more or less abiding and progressive, with only remissions in its course and severity; the former is frequently associated with chronic renal disease, the latter is not. The urate-of-soda deposits about the articulations in gout appear as more or less round or ovoid swellings in the close vicinity of the joints, but not observing their exact level or their general form; softish when recent, they never acquire a bony hardness, and are nearly always capable of slight lateral movement. The skin covering them is frequently stretched and glossy, and may exhibit white spots of urate of soda. The articular nodosities in chronic rheumatoid arthritis are actual osseous enlargements of, or outgrowths from, the articular surfaces, forming part of them, immovable and conserving more or less their form. The integument covering the nodosities is not glossy or dotted with chalk-like specks. The several types of deformity of the fingers previously described, and mainly produced in rheumatoid arthritis by muscular contractions and altered shape of the articular surfaces, are not seen in gout. Finally, if chalk-like concretions are visible in the ears, joints, or finger-ends, or if the blood contain uric acid, gout is present. While rheumatoid arthritis and chronic gout occasionally coexist in the same patient in England, in Canada, where the latter disease is comparatively rare and the former quite common, the writer does not remember to have observed such coexistence.

Besides the acute syphilitic disease of the joints already alluded to as occurring in children (inherited), a chronic arthritis is observed in the adult amongst the very late lesions of syphilis. It is usually monoarticular, affects the larger joints, especially the knee, and may originate either in the synovial membrane or in the bone and periosteum. In syphilitic synovitis the history of the case, the existence occasionally of soft gummy tumors in the periarticular tissues and of hydrarthrosis, the trivial degree of pain and tenderness, the insidious invasion and chronic course of the affection, and its prompt relief by antisyphilitic remedies, will indicate the nature of the case.

When it originates in the bone and periosteum, although the invasion may be prompt and the pain at first severe, the latter usually moderates greatly and becomes nocturnal, and the articular surfaces present localized rather than general enlargement (hyperostosis); nodes often coexist; effusion is moderate, unless the synovial membrane is also involved, and full doses of iodide of potassium will soon afford relief.

PROGNOSIS.--In the polyarticular form the course varies much more than is commonly believed, and the disease must not be regarded as necessarily {96} progressive and incurable. When it occurs in young persons, and in children more especially, although it may suffer exacerbations and remissions for a few years, yet arrest of the disease and recovery of the functions of the joints, sometimes with very little deformity, now and then take place under suitable management. Quite recently a man of thirty-two consulted me about a vesical affection who from the age of eight had suffered every winter for twenty years from rheumatoid arthritis in his hands and feet, and finally in the knees. Yet when seen by me he had been free from pain in his joints for three years, and, although they were somewhat deformed, their movements were remarkably free and painless.

Several of my younger patients while bearing children rapidly and nursing them have had the disease in their hands or hands and wrists; exacerbations have recurred during subsequent lactations, and yet the disease has either become arrested or progressed very slowly and at long intervals. It is admitted, however, that these are all exceptional cases, and that the tendency both of polyarticular and of the monoarticular forms is to progress, and, either steadily or at intervals and by recurring attacks, to permanently deform the joints and impair their movements. Even under these circumstances, however, the patients may suffer little pain unless when forcible movements of the articulations are attempted.