Chronic Pharyngitis

DEFINITION.—A chronic inflammation of the mucous membrane of the pharynx, whether implicating the glandular structures or not, and commonly associated with similar chronic inflammation of contiguous structures.

SYNONYMS.—Chronic sore throat, Chronic angina.

Chronic pharyngitis presents in two varieties: 1, simple chronic pharyngitis (chronic catarrhal pharyngitis, chronic catarrhal sore throat), in which the disease does not affect, or affects but slightly, the glandular structures of the mucous membrane; and 2, follicular pharyngitis (granular pharyngitis, clergyman's sore throat), in which groups of the follicular glands of the mucous membrane are enlarged, and sometimes inflamed.

ETIOLOGY.—The predisposing causes of chronic catarrhal pharyngitis are those enumerated under the head of the acute form of the affection, and the exciting causes are repeated attacks of the acute malady.

The predisposing causes of chronic follicular pharyngitis are overcrowding, and sedentary occupations; and the exciting causes are chiefly improper use of the voice and exposure to local irritations, mechanical and chemical, including too free use of condiments, tobacco, and alcohol, gormandizing, and the alternations of hot food, cold drinks, ices, and hot drinks at meals. It is not so often a direct sequel of attacks of acute sore throat as a result of prolonged catarrhal pharyngitis; and sometimes it appears to be chronic, so to speak, from the outset.

Both forms of chronic pharyngitis are frequently associated with chronic inflammations of the mucous membranes elsewhere, particularly of the nasal passages and of the stomach, and, to a less extent, of the genito-urinary apparatus; the entire train of phenomena, in some instances, being due to passive congestion dependent upon impaired cardiac power. Similarly, it presents at times as one of the accompaniments of exophthalmic goitre. It is often associated with phthisis, and is sometimes found in phthisical subjects prior to the detection of the pulmonary disease. It is sometimes coincident with chronic cutaneous eruptions, and may depend on the same causes, whether dietetic or nervous.

Uterine disturbances may give rise to chronic pharyngitis, probably by reflex nervous influence, and so do other chronic and dispiriting complaints. In like manner, depression of spirits and impairment of bodily vigor from domestic, financial, and social chagrin provoke a train of phenomena in which chronic pharyngitis may be a prominent manifestation.

PATHOLOGY AND MORBID ANATOMY.—Simple chronic pharyngitis is a chronic catarrhal inflammation of the mucous membrane and submucous connective tissue of the pharynx, with irregular hyperplasia of all the histological elements, chiefly affecting the epithelial layers and the most superficial strata of the submucosa. The pharynx, the posterior surface of the palate, and the pharyngo-palatine folds are the structures most generally implicated, but the glosso-palatine folds, the base of the tongue, and even the anterior surface of the palate, are sometimes involved. At an advanced stage of the affection extension may take place to the vault of the pharynx and the posterior nasal outlets, and in occasional instances to the larynx.

The initial hyperæmia of diffuse congestion finally leads to permanent dilatation of tracts of capillaries varying in area and mode of distribution, sometimes recalling the territorial outlines upon a map. The mucous membrane is bright red in color and irregularly thickened, sometimes into prominent welts or folds. The palate is often relaxed. Hypersecretion takes place over the entire diseased surface, and there is considerable desquamation of turbid epithelium, which sometimes accumulates in masses. Glands are dilated and hypertrophied here and there, but not in every instance, or if so indiscernibly, at least, to the naked eye.

In some cases enlarged follicles are very prominent in the infra-tonsillar space, between the anterior and posterior palatine folds, and along the lateral walls of the pharynx down toward the base of the tongue. The circumvallate papillæ may also be enlarged, and the fungiform papillæ are sometimes very prominent and deeply congested.

In the folliculous variety of the disease the hyperplasia affects chiefly the mucous glands and follicles, isolated or in groups, together with zones of connective tissue surrounding them and the epithelial investment of the mucous membrane in their immediate neighborhood. A number of small projections, from the size of pinheads to that of peas, mostly somewhat hemispheroidal, sometimes ellipsoidal or quite irregular in configuration, stud the pharynx irregularly. When clustered they are more apt to occupy the lateral angles of the pharynx. In this locality indeed the chains of glands and their enveloping mucous membrane sometimes present in longitudinal ridges which simulate additional or adventitious post-palatine folds. The projections are usually opaque, deeper in color than the surrounding congested mucous membrane, and velvety from loss of squamous epithelium. Sometimes they are translucent, as if filled with colloid material, probably retained and degenerated secretion. Very often their contents undergo caseous degeneration, and sometimes even calcification—a variety designated tubercular by Green, Gibb, and others, but far different histologically from true tuberculosis of the pharyngeal glands, which does occur occasionally in phthisical patients.

Delicate red lines of engorged capillaries usually surround the base of these projections. There is great disposition to the accumulation of viscid, discolored mucus on the surface of the mucous membrane. As the disease progresses all the processes become more widely extended, until finally nearly the entire pharyngeal and oral mucous membrane becomes involved. The soft palate becomes relaxed and the uvula thickened and elongated, sometimes to an extreme degree. Chronic folliculous tonsillitis exists in many cases.

When either form of chronic pharyngitis continues for a long while unchecked, there may result atrophy of the glandular structures and epithelial elements generally, giving rise to pharyngitis sicca or atrophic pharyngitis (so-called dry catarrh). There is then but scanty secretion, and this dries rapidly upon the surface of the thin mucous membrane, which becomes rough, inflexible, and glazed.

SYMPTOMATOLOGY.—Cough, expectoration, impairment of voice, dysphagia, and uncomfortable sensations in the throat present in various degrees according to the stage of the disease and the temperament of the patient. Hemming and hawking to clear the throat often become habitual, especially in cases associated with chronic internal rhinitis, being provoked in many instances by secretory products which drop into the pharynx or glide along its walls. It is sometimes important to distinguish this habit from the cough of laryngeal or bronchial irritation.

In cases associated with chronic gastritis the loss of appetite and consequent emaciation accompanying the symptoms of pharyngitis sometimes lead friends of the patient to a mistaken diagnosis of consumption; and when, as is not infrequent, chronic bronchitis also coexists, even the physician may be misled.

In many instances of chronic folliculous pharyngitis evidently of long standing, and accidentally discovered at times to the surprise of the patient, no history of the classical group of symptoms can be obtained.

DIAGNOSIS.—The diffuse congestion of the mucous membrane and the absence of marked involvement of the follicles are, with the history of the case, the main discriminative features in the diagnosis of chronic catarrhal pharyngitis. The regular or irregular masses of tissue projecting beyond the general surface of the mucous membrane are the distinguishing characteristics of chronic folliculous pharyngitis. The vascular network of dilated capillaries mapping the surface into numerous irregular small areas of different sizes is not peculiar to either variety.

PROGNOSIS.—The prognosis of chronic catarrhal pharyngitis is favorable when no irremediable malady of body or mind exists. Much depends on the practicability of improving the dietetic and hygienic environment of the patient. The prognosis is likewise good in chronic folliculous pharyngitis under favorable surroundings, so far as relief from suffering is concerned; but the follicles, when long hypertrophied, so rarely undergo absorption under any treatment that their destruction becomes necessary—quite a different thing from their cure. The enlarged follicles once destroyed, the collateral irritative inflammation caused by them usually subsides. Impairment of voice, a result of the disease, may be remedied in young subjects, who will learn to use the voice with the abdomen in distension; but much improvement cannot be expected in old subjects and in those in whom the disease has been produced by improper methods of declamation, which are beyond correction.

TREATMENT.—In chronic catarrhal pharyngitis constitutional treatment adapted to the diathetic condition is required in the first instance. Alkaline laxatives are usually indicated by the irregularly coated tongue and the tendency to costiveness. These may be advantageously administered in half a pint of hot water one hour or so before meals, with a view of washing the stomach free from accumulations of mucus, epithelium, and retained products of digestion and decomposition, so that its condition may be improved for the reception and digestion of the ensuing meal. Topical medication of the throat is likewise requisite. This should be of a soothing character. Mild astringents are applicable, but strong astringents are often actually injurious. Silver nitrate and cupric sulphate in stick or strong solution should not be used; but sprays of dilute solutions (one or two grains to the ounce of distilled water), twice or thrice a day, are often of service. Zinc sulphate (five grains to the ounce) may be used in the same manner. Zinc chloride (ten grains to the ounce), carefully applied to the surface daily with a broad brush or soft cotton wad, is a useful remedy. Tannin in ether sometimes answers admirably, a delicate film being left for some time on the surface. Solutions of bismuth nitrate or borate in glycerin applied locally often relieve uneasiness. A broad flat brush is the best instrument for making these applications, placed low in the pharynx so as to paint the entire posterior wall by a single movement from below upward.

For home use, sprays, three or four times a day, of tar-water, containing five or ten grains to the ounce, of sodium borate or bicarbonate, or sodium, potassium, or ammonium chloride, or sodium, potassium, or ammonium iodide, are soothing and efficacious, and much superior to gargles. They are often preferred warm. Demulcent lozenges (gelatin, acacia, althæa, glycyrrhiza) slowly dissolved in the mouth often relieve topical discomfort.

Much more active treatment is required in chronic folliculous pharyngitis. Judicious constitutional treatment is of great importance. Topical medication is of equal importance. In recent cases of moderate intensity the ordinary treatment for the catarrhal variety sometimes suffices. In cases of long standing strong solutions of silver nitrate (sixty to one hundred and twenty grains to the ounce), carefully applied with the broad flat brush twice or thrice a week, are often of great remedial effect. Iodine (one drachm to the ounce of glycerin), alone or in combination with equal parts of carbolic acid, applied daily, may be serviceable in cases unimproved by the silver nitrate. Dilatation of the capillaries may sometimes be benefited by applications of ergot (fluid extract) or ergotin (grs. x-xx to the ounce). Enlarged follicles of long standing are rarely amenable to astringent and alterant topical treatment. They require destruction. The agent to be used is a matter of indifference as a rule, and, according to the taste or resources of the practitioner, may be the solid silver nitrate, caustic potash, London paste, zinc chloride, or the incandescent cautery, whether heated by fire, hot naphtha, or electricity.

The sprays and lozenges already mentioned are useful in this variety of pharyngitis also. They may be medicated with sedative ingredients according to indications for the relief of pain and discomfort.

In cases resisting the plan of treatment suggested mercuric chloride may be successfully used, both internally (gr. 1/16 two or three times a day) and in spray, a drachm or less night and morning (one grain to four ounces). External counter-irritation by repeated blistering over the larynx and under the angles of the jaws is useful in some instances. During treatment the voice should be used as sparingly as practicable.

In chronic atrophic pharyngitis the treatment, constitutional and local, should be such as favors secretion from mucous membranes—internally, cubeb, pyrethrum, calamus, xanthoxylum, jaborandi, ammonium chloride; topically, sprays, four or more times a day, of hot water, glycerin and water, ammonium chloride. Patients sleeping with the mouth open should wear an apparatus, extemporized or made to order, to keep the lower jaw closed in sleep.