Part 54

Under the term black tongue two different affections have been described, the one an epidemic erysipelatous disorder to be mentioned under parenchymatous glossitis, and the other, now to be mentioned, a peculiar black pigmentation due to parasitic disease seated upon and around the hypertrophied filiform papillæ. The ordinary parasitic vegetations found upon the tongue do not produce the affection in question.

HISTORY.--First described by H. Hyde Salter, and then by Eulenburg, it has been made the subject of observation by Raynaud, Fereol and others, Lanceraux, Dessois, Hirz, Pasquier, Moure, and a few {358} others. Outside of French literature, little had been written of it until very recently.

ETIOLOGY.--The affection appears to be due to some fault of nutrition, but the cause has not been determined. The fluids of the mouth always exhibit an acid reaction. It has been seen chiefly in dyspeptics and hypochondriacs, and has seemed in one instance (Moure) to have followed the use of chlorate-of-potash lozenges. A case has been recorded by Solomon Solis Cohen in a negro child the subject of congenital syphilis. Mr. George Stoker and G. Y. Broatch have each reported a case of long duration occurring in a painter.

PATHOLOGY AND MORBID ANATOMY.--The disease is characterized by a grayish-black or fully black discoloration on the upper surface of the tongue, which gives it an aspect which recalls the normal appearance of the tongue of the parrot and the giraffe, and an occasional appearance of the organ in the ox, sheep, dog, cat, and some other animals. The filiform papillæ are enormously elongated, so that they closely resemble hairs, and they are described by some writers as lying upon the surface of the tongue in confusion like that of a field of wheat thrown down by the wind. The individual papillæ are surrounded with a parasitic vegetable growth. Raynaud compared the microscopic spores in his case to the microphyte of tinea tonsurans or that of herpes circinatus. According to Malassez, they do not differ from those found in the saburral tongue of the dyspeptic, and he considers that their development is favored by their very arrest by the hypertrophied papillæ. Nevertheless, the subjects of this disease are not all dyspeptics by any means. Dessois made culture-efforts to reproduce the disease upon his own tongue, but failed to inoculate it. For detailed description of the disease we cannot do better than refer the interested reader to Dessois' monograph, from whose observations, chiefly, it appears that the discoloration begins at the central portion of the tongue, increases gradually in extent and intensity for three or four days, and then gradually disappears by desquamation. The tongue is very dry while the affection is at its height. Close examination of the parts and microscopic inspection of papillæ removed for the purpose are said to show that the spores of the cryptogam are first developed at the base of the papillæ, separating them from each other. The irritation produced by the parasite causes longitudinal hypertrophy of the papilla, and the continued growth of the parasite produces a muff-like envelopment of the papilla; the spores at the same time becoming insinuated between the most superficial epithelial cells and dislocating them, so that they maintain their position around the axis of the papilla only by means of the intervening parasitic masses. The papilla continues to elongate and the cryptogam to increase, until finally it invades nearly the entire length of the papilla. This entire parasitic mass soon becomes detached, carrying with it the epithelial cells under which it has become insinuated, and leaves the papilla naked, save for a few cells remaining attached by their superior borders. In the case observed by my brother, as in Mr. Stoker's and Broatch's cases, microscopical examination of the black filaments showed them to be composed of closely-packed epithelial cells, overlapping one another, stained {359} brown, and decreasing in intensity of color from the apex toward the base of the filament. In some cells the nucleus was darker, and in others lighter, than the surrounding protoplasm. The cryptogam, therefore, cannot always be detected. Indeed, there seems reason to believe that the affection may not be parasitic, although the prominence given to this feature by French writers apparently warrants its being so considered. There may be two kinds of black tongue--one non-parasitic.

SYMPTOMS.--There are no special subjective symptoms. The objective symptoms are the peculiar dark or black discoloration of the upper surface of the tongue and the excessively elongated filiform papillæ.

DIAGNOSIS.--The chief diagnostic feature is the black discoloration of the tongue which has given the name black tongue to the disease. Discrimination is requisite from discoloration by food or medicine.

PROGNOSIS.--This is favorable, the condition subsiding under treatment, and sometimes spontaneously, though liable to recurrence. In some instances the condition becomes chronic.

TREATMENT.--The indication is to endeavor to favor desquamation of the papilla by means of potassium chloride or sodium borate, and to administer alkalines, so as to render the saliva alkaline and unfavorable for the development of the parasite. It is recommended, in addition, to scrape the tongue with a spatula, and to douche it with a spray of mercuric chloride, 1:500. Attention to the general health is requisite, especially in dyspeptics and hypochondriacs. In the case of the negro child above alluded to the discoloration of the tongue finally disappeared under the systemic use of potassium iodide, without topical treatment, although repeated recurrences took place at varying intervals.

Parenchymatous Glossitis.

DEFINITION.--An inflammation of the tongue involving its substance as well as the mucous membrane.

SYNONYMS.--Idiopathic glossitis. Interstitial glossitis. Erectile glossitis (Salter), Glossomegistus (Sauvages), Paraglossia.

HISTORY.--Albeit a comparatively infrequent disease, especially at the present day, numerous cases and collections of cases are on record from very early times; and the affection seems to have attracted the attention of medical writers ever since. Hippocrates, Galen, Aretæus, Celsus, Aëtius, Avicenna, Forestus, Rivière, Schenkins, Sauvages, Vogel, van Swieten, are referred to by more modern writers as having described the disease. Louis, De la Malle, Lassus, J. P. Frank, Jn. Frank, Fleming, Clarke, and Bryant may be cited as the most prominent recent observers.

ETIOLOGY.--Predisposing and Exciting Causes.--Glossitis is sometimes idiopathic, sometimes deuteropathic, and sometimes traumatic. Impaired health from over-fatigue or from exhaustive disease may be regarded as a predisposing cause in the presence of the causes which more frequently give rise to traumatic glossitis. Sudden or prolonged exposure to atmospheric changes, to cold and moisture, as when working in damp and wet localities, is often the apparent determining cause in {360} both the idiopathic and deuteropathic varieties. In many instances occurring in this way it is found that the tongue has long been subjected to mechanical irritation from jagged teeth.

Idiopathic glossitis occurs at all ages, but has been supposed by some observers to be more frequent in scrofulous subjects. It occurs in the apparently healthy only after severe exposure to wet and cold, and in convalescents from acute febrile diseases usually after some moderate exposure to a draught of air or change of temperature. It appears to be more imminent after influenza (Möller, Smee, Graves, Salter) than after other febrile disorders. It has occasionally been caused by chewing acrid plants, some of them food-plants, some of them medicinal. In the list have been included celery, bilberries, Daphne mezereum and Daphne laureola, aconite, and tobacco. It has been known to follow the eating of shellfish (Watson, Salter).

Deuteropathic glossitis has occurred during the course of scarlatina, variola, epidemic erysipelas (black tongue), scorbutus, enteric fever, glanders, septicæmia from various causes, rheumatism, diffuse inflammation of the connective tissue of the cervico-mental region, herpes, syphilis, ptyalism, mercurial and other varieties of toxæmic stomatitis, tonsillitis, pharyngitis, gastritis, and epithelioma of the tongue. It appears to be occasionally endemic (Fleming), and is occasionally epidemic (Reil). In the United States it prevailed extensively during an epidemic of erysipelas that overran the country from 1842 to 1846, inclusive, and was frequently reported in the American medical journals of that period under the name of black tongue. In some localities more than half the cases terminated fatally, sometimes within two or three days, more frequently about the eighth or tenth day, and occasionally still later. Traumatic glossitis arises from a number of causes. Among these may be mentioned the irritation of jagged edges of broken and carious teeth; wounds from firearms and other weapons; wounds from splinters of toothpicks, spiculæ of bone, broken pipe-stems, pins, needles, nails, slate-pencils, and other pointed things inadvertently placed in the mouth; wounds from the teeth during epileptic seizures and other convulsive paroxysms; contact of the tongue with cold iron in cold weather; the inspiration of very hot air, as in burning buildings; burns, scalds, scalding beverages; acrid and corrosive substances introduced by design or accident; incautious use of tobacco in bulk, and of ammonia; incautious cauterization; concealed calculi in the tongue; concealed bulbs of teeth; rupture of the lingual frenum; the bites and stings of venomous insects, as the wasp, the hornet, and the bee. For many years writers have referred to a case reported by Dupont to the Parisian Academy of Medicine which followed a young man's attempt to win a wager that he would bite into the body of a living toad, and to two fatal cases reported by Ambrose Paré from drinking a vinous infusion of sage which was subsequently found to have been impregnated with the saliva of the toad.

SYMPTOMS, COURSE, DURATION, TERMINATIONS, COMPLICATIONS, AND SEQUELÆ.--In acute parenchymatous glossitis the local symptoms often appear quite suddenly, usually unilaterally, even when they become bilateral subsequently, and they increase in severity with great rapidity. {361} These symptoms are, at first, distinct sensations of heat and tumefaction in the tongue, quickly followed by stiffness and considerable impediment in its movements, as though it were numb and weighted down. In cases where the glossitis is an extension from tonsillitis, these sensations begin in the root of the organ. They commence at the root likewise, in most instances following exposure to severe cold and moisture. In other instances the extremity of the organ is affected first. In cases resulting from local injury the symptoms commence at the injured portion. The local symptoms are sometimes preceded by rigor, followed by fever, cephalalgia, and pains in the neck and occiput. Examined at this time, the tongue is seen to be swollen and studded with indentations due to the pressure sustained from the teeth. At first the surface is punctated and red; subsequently it becomes brownish or decidedly brown. Although the organ may remain moist for several hours, it eventually becomes excessively dry, and supports a thick adhesive coating of mucus and epithelium.

In a few hours, sometimes as few as two or three, the entire organ may become involved in the inflammation, enlarging to such an extent as to keep the lower jaw depressed, to fill almost the entire oral cavity or to quite fill it, and to project like a tumor beyond the teeth and the lips (Fig. 16). In exceptional cases the enlargement of the tongue has been so great as to produce dislocation of the lower jaw. The soft palate is lifted up and the epiglottis often pressed down. The latter condition has been known to threaten suffocation. In this condition the patient cannot breathe through the mouth, widely as it may be forced open, and has great difficulty in breathing through the nose. Respiration is therefore laborious. Articulation is impeded or impossible, and deglutition difficult or impracticable. The tumefaction and congestion are often continuous into the floor of the mouth and the parts adjacent. The sublingual and submaxillary glands often become swollen, tense, and painful; and the entire neck is sometimes swollen to such a degree as to exert injurious pressure on the jugular veins. The tongue is very hard to the touch, almost or quite immovable, and is the seat of burning heat and pain. The pain often extends from the root of the tongue along the glosso-pharyngeal folds into the pharynx, and thence by way of the Eustachian tubes into the ears, the folds just named being very much upon the stretch. When the tongue protrudes far out of the mouth it becomes excessively dry, fissured, sanious, and excoriated, or even ulcerated at points where it is subjected to the pressure of the teeth. It is covered with dark viscid secretions, which often extend beyond it and over the entire aperture of the mouth. The epithelial coating often undergoes desquamation, and then the organ becomes exquisitely sensitive to the contact of food, water, or even the air. This desquamation is sometimes in mass, in sheets peeling off like a pseudo-membrane. The general symptoms vary in individual cases. As a rule, the face is turgid and its expression anxious; the conjunctiva suffused, respiration impeded, and sleep disturbed or impracticable. Saliva dribbles externally, often in considerable quantity. The {362} odor from the mouth becomes quite fetid from decomposition of the retained products of secretion. Thirst is usually intense, though immoderate only in some cases. Cough is more or less constant and quite exhausting. This and the dribbling of saliva contribute with the dyspnoea to prevent sleep. Pyrexia is often intense. The pulse is strong and quick at first, 100-120 per minute, and there is often marked throbbing of the temporal and carotid arteries. The skin is hot and dry at first, but cold sweat subsequently accumulates upon the face and neck as the dyspnoea increases. The bowels are constipated. The urine is scanty and high colored. The impediment to the return of blood to the heart from the head causes cerebral congestion, drowsiness, and even threatens asphyxia. In other cases there is intense cephalalgia, nervous irritability, restlessness, and even delirium.

The symptoms sometimes reach their acme in rather less than forty-eight hours, and then gradually subside. More frequently they continue on into the third or fourth day. Occasionally they are protracted as long as the fifth or sixth or even the eighth day, rarely longer. Resolution occasionally takes place within twenty-four hours, however (van Swieten), though more frequently occurring from the fifth to the seventh day. In some instances remittance or intermittence has been noted, the cause therefor not being apparent, although attributed to malaria.

Resolution of the inflammatory process is usually indicated by the gradual return of moisture on the tongue and progressive detumescence of the organ, accompanied by subsidence of the redness, heat, and pain. Increased secretion of saliva, general perspiration, or diuresis sometimes marks the cessation of the pyrexia.

Should the process be going to terminate in suppuration, the local distress increases, markedly about the end of the week. The pains become lancinating, and associated with throbbing of the lingual blood-vessels. The swelling becomes prominent and softer at some one point, although the sense of fluctuation is not very perceptible on palpation, and finally the abscess bursts through the surface, unless previously incised, and discharges a fetid pus. Suppuration always involves a prolonged duration of the attack.

In rare instances glossitis terminates in gangrene of the tongue, circumscribed or diffuse. This result is indicated by adynamic symptoms on the part of the constitution, and by the livid appearance of the parts undergoing mortification. The hemorrhage following extensive sloughs from gangrene has been fatal in some instances.

Fleming calls prominent attention to a complication of glossitis, of which he alludes to several examples. This is "an inflammation, circumscribed or diffused, originating in the loose areolar tissue between the genio-hyo-glossi muscles, and first manifesting itself by a train of symptoms identical with those of ordinary glossitis, but soon characterized by peculiar features." These features comprise fulness under the chin like that dubbed double chin, pressure upon which, especially near the hyoid bone, being very painful; and suppuration, which, circumscribed or diffuse, burrows most freely toward the base of the tongue.

Chronic induration of the tongue sometimes remains unilateral, although the acute disease has not been unilateral.

{363} PATHOLOGY AND MORBID ANATOMY.--It has been advanced that in idiopathic glossitis from cold the engorgement of the vessels is probably a consequence of vaso-dilator influence of the glosso-pharyngeal nerve for the base of the organ, and of the chorda-tympani for the anterior portion. An instance of herpetic glossitis from probable irritation of the chorda-tympani nerve by an aural polypus (Berkely Hill) seems to lend some force to this opinion. However engendered, there is a rapid distension of the organ by blood, followed by infiltration of fibrin and serum into the intermuscular connective tissue and into the planes of the connective tissue separating the muscular fasciculi. In some instances degeneration of muscular fibre has been observed. There is great increase in the thickness of the coats of epithelium, beneath which the mucous membrane is red and its papillæ erect. This coating sometimes peels off like a false membrane. In cases extending from tonsillitis the base of the tongue suffers most.

The disease usually terminates by resolution, although a slight amount of hypertrophy, unilateral or bilateral, sometimes persists, and occasionally to a marked degree (Wells). In instances much less frequent suppuration ensues, usually in debilitated subjects or in cases due to traumatism or in cases inefficiently treated. The suppurative process is usually circumscribed and unilateral, and the abscess points most frequently just beneath the side of the tongue; sometimes, however, the pointing takes place at the dorsum, sometimes at the tip. The pressure of the teeth seems to be the provocative cause of the disposition to point at the edge of the tongue. The pus is usually quite fetid. Sometimes the abscess is gangrenous.

Gangrene is an infrequent result of glossitis. The pressure of the teeth, strangulating the organ at the oral outlet, seems to occasion the failure of nutrition in instances where it occurs. The losses are ordinarily insignificant, though appearing quite extensive while the tongue remains swollen. Sometimes large portions drop off, and fatal hemorrhage has resulted (Frank) in consequence. From the nature of the organ the parts separate more readily than in almost any other instance. Gangrenous abscess, ensuing even from very slight causes, such as a wound with the head of a barleycorn (Ranking), sometimes proves fatal.

In those cases of diffuse inflammation of the interconnective tissue of the genio-hyo-glossi muscles Fleming states that the suppuration--which, whether circumscribed or diffuse, burrows toward the root of the tongue--absolutely dissects its extrinsic muscles and destroys their functions; ultimately injuring the periosteum and laying bare the inside of the inferior maxilla in the vicinity of their attachments. When an incision is made to the parts through the integument, the muscles will be found on palpation flabby and detached, and their interstices filled with purulent matter, sometimes very fetid.

DIAGNOSIS.--These is no difficulty in the diagnosis, except in the early stage of such examples as are attributed to metastatic gout and rheumatism. The subsidence of the peculiar pains elsewhere, and the onset of pain in the tongue, would lead to the inference that a glossitis of this kind {364} was in progress. The acuteness of the tumefaction would distinguish it from hypertrophy of the tongue on the one hand, and from the tumefaction attending malignant disease on the other.