E-text prepared by Kevin Handy, Ronnie Sahlberg, cbott, John Hagerson,
and the Project Gutenberg Online Distributed Proofreading Team
(http://www.pgdp.net)

DORLAND'S

AMERICAN ILLUSTRATED

MEDICAL DICTIONARY

For Students and Practitioners

A New and Complete Dictionary of the terms used in Medicine, Surgery, Dentistry, Pharmacy, Chemistry, and kindred branches; together with new and elaborate Tables of Arteries, Muscles, Nerves, Veins, etc.; of Bacilli, Bacteria, Micrococci, etc.; Eponymic Tables of Diseases, Operations, Signs and Symptoms, Stains, Tests, Methods of Treatment, etc. By W.A.N. Dorland, M.D., Editor of the American Pocket Medical Dictionary. Large octavo, nearly 800 pages, bound in full flexible leather. Price, $4.50 net; with thumb index, $5.00 net.

JUST ISSUED—NEW (4) REVISED EDITION--2000 NEW WORDS

It contains a maximum amount of matter in a minimum

space and at the lowest possible cost.

This book contains double the material in the ordinary students' dictionary, and yet, by the use of a clear, condensed type and thin paper of the finest quality, is only 1-3/4 inches in thickness. It is bound in full flexible leather, and is just the kind of a book that a man will want to keep on his desk for constant reference. The book makes a special feature of the newer words, and defines hundreds of important terms not to be found in any other dictionary. It is especially full in the matter of tables, containing more than a hundred of great practical value, including new tables of Tests, Stains and Staining Methods. A new feature is the inclusion of numerous handsome illustrations, many of them in colors, drawn and engraved specially for this book.

“I must acknowledge my astonishment at seeing how much he has condensed within relatively small space. I find nothing to criticise, very much to commend, and was interested in finding some of the new words which are not in other recent dictionaries.”—Roswell Park, Professor of Principles and Practice of Surgery and Clinical Surgery, University of Buffalo.

“Dr. Dorland's Dictionary is admirable. It is so well gotten up and of such convenient size. No errors have been found in my use of it.”—Howard A. Kelly, Professor of Gynecology, Johns Hopkins University, Baltimore.

W. B. SAUNDERS COMPANY, 925 Walnut St., Phila.

London: 9, Henrietta Street, Covent Garden

THE

AMERICAN POCKET

MEDICAL DICTIONARY

EDITED BY

W.A. NEWMAN DORLAND, A.M., M.D.,

Assistant Demonstrator of Obstetrics, University of Pennsylvania.

HUNDREDS OF NEW TERMS

Bound in Full Leather, Limp, with Gold Edges. Price, $1.00 net; with Patent Thumb Index, $1.25 net.

The book is an absolutely new one. It is not a revision of any old work, but it has been written entirely anew and is constructed on lines that experience has shown to be the most practical for a work of this kind. It aims to be complete, and to that end contains practically all the terms of modern medicine. This makes an unusually large vocabulary. Besides the ordinary dictionary terms the book contains a wealth of anatomical and other tables. This matter is of particular value to students for memorizing in preparation for examination.

“I am struck at once with admiration at the compact size and attractive exterior. I can recommend it to our students without reserve.”—James W. Holland, M.D., of Jefferson Medical College.

“This is a handy pocket dictionary, which is so full and complete that it puts to shame some of the more pretentious volumes.”—Journal of the American Medical Association.

“We have consulted it for the meaning of many new and rare terms, and have not met with a disappointment. The definitions are exquisitely clear and concise. We have never found so much information in so small a space.”—Dublin Journal of Medical Science.

“This is a handy little volume that, upon examination, seems fairly to fulfil the promise of its title, and to contain a vast amount of information in a very small space.... It is somewhat surprising that it contains so many of the rarer terms used in medicine.”—Bulletin Johns Hopkins Hospital, Baltimore.

W. B. SAUNDERS COMPANY, 925 Walnut St., Phila.

London: 9, Henrietta Street, Covent Garden

ESSENTIALS

OF

DISEASES OF THE SKIN.

Since the issue of the first volume of the Saunders Question-Compends,

OVER 290,000 COPIES

of these unrivalled publications have been sold. This enormous sale is indisputable evidence of the value of these self-helps to students and physicians.

SAUNDERS' QUESTION-COMPENDS. No. 11.

ESSENTIALS

OF

DISEASES OF THE SKIN

INCLUDING THE

SYPHILODERMATA

ARRANGED IN THE FORM OF

QUESTIONS AND ANSWERS

PREPARED ESPECIALLY FOR

STUDENTS OF MEDICINE

BY

HENRY W. STELWAGON, M.D., PH.D.

Professor of Dermatology in the Jefferson Medical College, Philadelphia; Dermatologist to the Howard and Philadelphia Hospitals, etc.

SEVENTH EDITION, THOROUGHLY REVISED

ILLUSTRATED

PHILADELPHIA AND LONDON

W. B. SAUNDERS COMPANY

1909

Set up, electrotyped, printed, 1890. Reprinted July, 1891.

Revised, reprinted, June, 1894. Reprinted March, 1897.

Revised, reprinted, August, 1899. Reprinted September,

1901, May, 1902, September, 1903. Revised, reprinted

January, 1905. Reprinted March,

1906. Revised, reprinted

March, 1909.

PRINTED IN AMERICA

PRESS OF

W. B. SAUNDERS COMPANY

PHILADELPHIA

PREFACE TO SEVENTH EDITION.

In the present—seventh—edition the subject matter, especially as regards the practical part, has been gone over carefully and the necessary corrections and additions made. Nineteen new illustrations have been added, a few of the old ones being eliminated. It is hoped that the continued demand for this compend means a widening interest in the study of diseases of the skin, sufficiently keen as to lead to the desire for a still greater knowledge.

H.W.S.

PREFACE TO FIRST EDITION.

Much of the present volume is, in a measure, the outcome of a thorough revision, remodelling and simplification of the various articles contributed by the author to Pepper's System of Medicine, Buck's Reference Handbook of the Medical Sciences, and Keating's Cyclopædia of the Diseases of Children. Moreover, in the endeavor to present the subject as tersely and briefly as compatible with clear understanding, the several standard treatises on diseases of the skin by Tilbury Fox, Duhring, Hyde, Robinson, Anderson, and Crocker, have been freely consulted, that of the last-named author suggesting the pictorial presentation of the “Anatomy of the Skin.” The space allotted to each disease has been based upon relative importance. As to treatment, the best and approved methods only—those which are founded upon the aggregate experience of dermatologists—are referred to.

For general information a statistical table from the Transactions of the American Dermatological Association is appended.

H.W.S.

CONTENTS.

DISEASES OF THE SKIN.

ANATOMY OF THE SKIN

Fig. 1.

Vertical section of the skin—Diagrammatic. (After Heitsmann.)

The Epidermis.

Fig. 2.

c, corneous (horny) layer; g, granular layer; m, mucous layer (rete Malpighii).
The stratum lucidum is the layer just above the granular layer.
Nerve terminations—n, afferent nerve; b, terminal nerve bulbs; l, cell of Langerhans.

(After Ranvier.)

The Blood-vessels.

Fig. 3.

C, epidermis; D, corium; P, papillæ; S, sweat-gland duct.
v, arterial and venous capillaries (superficial, or papillary plexus) of the papillæ.
Deep plexus is partly shown at lower margin of the diagram; vs—an intermediate
plexus, an outgrowth from the deep plexus, supplying sweat-glands, and
giving a loop to hair papilla.

(After Ranvier).

The Nervous and Vascular Papillæ.

Fig. 4.

a, a vascular papilla; b, a nervous papilla; c, a blood-vessel; d, a nerve fibre;
e, a tactile corpuscle.

(After Biesiadecki.)

The Hair and Hair-Follicle.

Fig. 5.

A, shaft of the hair; B, root of the hair; C, cuticle of the hair; D, medullary substance of the hair.

E, external layer of the hair-follicle; F, middle layer of the hair-follicle; G, internal layer of the hair-follicle; H, papilla of the hair; I, external root-sheath; J, outer layer of the internal root-sheath; K, internal layer of the internal root-sheath.

(After Duhring.)

SYMPTOMATOLOGY.

The symptoms of cutaneous disease may be objective, subjective or both; and in some diseases, also, there may be systemic disturbance.

What do you mean by objective symptoms?

Those symptoms visible to the eye or touch.

What do you understand by subjective symptoms?

Those which relate to sensation, such as itching, tingling, burning, pain, tenderness, heat, anæsthesia, and hyperæsthesia.

What do you mean by systemic symptoms?

Those general symptoms, slight or profound, which are sometimes associated, primarily or secondarily, with the cutaneous disease, as, for example, the systemic disturbance in leprosy, pemphigus, and purpura hemorrhagica.

Into what two classes of lesions are the objective symptoms commonly divided?

Primary (or elementary), and

Secondary (or consecutive).

Primary Lesions.

What are primary lesions?

Those objective lesions with which cutaneous diseases begin. They may continue as such or may undergo modification, passing into the secondary or consecutive lesions.

Enumerate the primary lesions.

Macules, papules, tubercles, wheals, tumors, vesicles, blebs and pustules.

What are macules (maculæ)?

Variously-sized, shaped and tinted spots and discolorations, without elevation or depression; as, for example, freckles, spots of purpura, macules of cutaneous syphilis.

What are papules (papulæ)?

Small, circumscribed, solid elevations, rarely exceeding the size of a split-pea, and usually superficially seated; as, for example, the papules of eczema, of acne, and of cutaneous syphilis.

What are tubercles (tubercula)?

Circumscribed, solid elevations, commonly pea-sized and usually deep-seated; as, for example, the tubercles of syphilis, of leprosy, and of lupus.

What are wheals (pomphi)?

Variously-sized and shaped, whitish, pinkish or reddish elevations, of an evanescent character; as, for example, the lesions of urticaria, the lesions produced by the bite of a mosquito or by the sting of a nettle.

What are tumors (tumores)?

Soft or firm elevations, usually large and prominent, and having their seat in the corium and subcutaneous tissue; as, for example, sebaceous tumors, gummata, and the lesions of fibroma.

What are vesicles (vesiculæ)?

Pin-head to pea-sized, circumscribed epidermal elevations, containing serous fluid; as, for example, the so-called fever-blisters, the lesions of herpes zoster, and of vesicular eczema.

What are blebs (bullæ)?

Rounded or irregularly-shaped, pea to egg-sized epidermic elevations, with fluid contents; in short, they are essentially the same as vesicles and pustules except as to size; as, for example, the blebs of pemphigus, rhus poisoning, and syphilis.

What are pustules (pustulæ)?

Circumscribed epidermic elevations containing pus; as, for example, the pustules of acne, of impetigo, and of sycosis.

Secondary Lesions.

What are secondary lesions?

Those lesions resulting from accidental or natural change, modification or termination of the primary lesions.

Enumerate the secondary lesions.

Scales, crusts, excoriations, fissures, ulcers, scars and stains.

What are scales (squamæ)?

Dry, laminated, epidermal exfoliations; as, for example, the scales of psoriasis, ichthyosis, and eczema.

What are crusts (crustæ)?

Dried effete masses of exudation; as, for example, the crusts of impetigo, of eczema, and of the pustular and ulcerating syphilodermata.

What are excoriations (excoriationes)?

Superficial, usually epidermal, linear or punctate loss of tissue; as, for example, ordinary scratch-marks.

What are fissures (rhagades)?

Linear cracks or wounds, involving the epidermis, or epidermis and corium; as, for example, the cracks which often occur in eczema when seated about the joints, the cracks of chapped lips and hands.

What are ulcers (ulcera)?

Rounded or irregularly-shaped and sized loss of skin and subcutaneous tissue resulting from disease; as, for example, the ulcers of syphilis and of cancer.

What are scars (cicatrices)?

Connective-tissue new formations replacing loss of substance.

What are stains?

Discolorations left by cutaneous disease, which stains may be transitory or permanent.

Distribution and Configuration.

What do you mean by a patch of eruption?

A single group or aggregation of lesions or an area of disease.

When is an eruption said to be limited or localized?

When it is confined to one part or region.

When is an eruption said to be general or generalized?

When it is scattered, uniformly or irregularly, over the entire surface.

When is an eruption universal?

When the whole integument is involved, without any intervening healthy skin.

When is an eruption said to be discrete?

When the lesions constituting the eruption are isolated, having more or less intervening normal skin.

When is an eruption confluent?

When the lesions constituting the eruption are so closely crowded that a solid sheet results.

When is an eruption uniform?

When the lesions constituting the eruption are all of one type or character.

When is an eruption multiform?

When the lesions constituting the eruption are of two or more types or characters.

When are lesions said to be aggregated?

When they tend to form groups or closely-crowded patches.

When are lesions disseminated?

When they are irregularly scattered, with no tendency to form groups or patches.

When is a patch of eruption said to be circinate?

When it presents a rounded form, and usually tending to clear in the centre; as, for example, a patch of ringworm.

When is a patch of eruption said to be annular?

When it is ring-shaped, the central portion being clear; as, for example, in erythema annulare.

What meaning is conveyed by the term “iris”?

The patch of eruption is made up of several concentric rings. Difference of duration of the individual rings, usually slight, tends to give the patch variegated coloration; as, for example, in erythema iris and herpes iris.

What meaning is conveyed by the term “marginate”?

The sheet of eruption is sharply defined against the healthy skin; as, for example, in erythema marginatum, eczema marginatum.

What meaning is conveyed by the qualifying term “circumscribed”?

The term is applied to small, usually more or less rounded, patches, when sharply defined; as, for example, the typical patches of psoriasis.

When is the qualifying term “gyrate” employed?

When the patches arrange themselves in an irregular winding or festoon-like manner; as, for instance, in some cases of psoriasis. It results, usually, from the coalescence of several rings, the eruption disappearing at the points of contact.

When is an eruption said to be serpiginous?

When the eruption spreads at the border, clearing up at the older part; as, for instance, in the serpiginous syphiloderm.

RELATIVE FREQUENCY.

Name the more common cutaneous diseases and state approximately their frequency.

Eczema, 30.4%; syphilis cutanea, 11.2%; acne, 7.3%; pediculosis, 4%; psoriasis, 3.3%; ringworm, 3.2%; dermatitis, 2.6%; scabies, 2.6%; urticaria, 2.5%; pruritus, 2.1%; seborrhœa, 2.1%; herpes simplex, 1.7%; favus, 1.7%; impetigo, 1.4%; herpes zoster, 1.2%; verruca, 1.1%; tinea versicolor, 1%. Total: eighteen diseases, representing 81 per cent. of all cases met with.

(These percentages are based upon statistics, public and private, of the American Dermatological Association, covering a period of ten years. In private practice the proportion of cases of pediculosis, scabies, favus, and impetigo is much smaller, while acne, acne rosacea, seborrhœa, epithelioma, and lupus are relatively more frequent.)

CONTAGIOUSNESS.

Name the more actively contagious skin diseases.

Impetigo contagiosa, ringworm, favus, scabies and pediculosis; excluding the exanthemata, erysipelas, syphilis and certain rare and doubtful diseases.

[At the present time when most diseases are presumed to be due to bacteria or parasites the belief in contagiousness, under certain conditions, has considerably broadened.]

RAPIDITY OF CURE.

Is the rapid cure of a skin disease fraught with any danger to the patient?

No. It was formerly so considered, especially by the public and general profession, and the impression still holds to some extent, but it is not in accord with dermatological experience.

OINTMENT BASES.

Name the several fats in common use for ointment bases.

Lard, petrolatum (or cosmoline or vaseline), cold cream and lanolin.

State the relative advantages of these several bases.

Lard is the best all-around base, possessing penetrating properties scarcely exceeded by any other fat.

Petrolatum is also valuable, having little, if any, tendency to change; it is useful as a protective, but is lacking in its power of penetration.

Cold Cream (ungt. aquæ rosæ) is soothing and cooling, and may often be used when other fatty applications disagree.

Lanolin is said to surpass in its power of penetration all other bases, but this is not borne out by experience. It is an unsatisfactory base when used alone. It should be mixed with another base in about the proportion of 25% to 50%.

These several bases may, and often with advantage, be variously combined.

What is to be added to these several bases if a stiffer ointment is required?

Simple cerate, wax, spermaceti, or suet; or in some instances, a pulverulent substance, such as starch, boric acid, and zinc oxide.

CLASS I.—DISORDERS OF THE GLANDS.

Hyperidrosis.

Fig. 6.

A normal sweat-gland, highly magnified. (After Neumann.)

a, Sweat-coil: b, sweat-duct; c, lumen of duct; d, connective-tissue capsule; e and f, arterial trunk and capillaries.

What is hyperidrosis?

Hyperidrosis is a functional disturbance of the sweat-glands, characterized by an increased production of sweat. This increase may be slight or excessive, local or general.

As a local affection, what parts are most commonly involved?

The hands, feet, especially the palmar and plantar surfaces, the axillæ and the genitalia.

Describe the symptoms of the local forms of hyperidrosis.

The essential, and frequently the sole symptom, is more or less profuse sweating.

If the hands are the parts involved, they are noted to be wet, clammy and sometimes cold.

If involving the soles, the skin often becomes more or less macerated and sodden in appearance, and as a result of this maceration and continued irritation they may become inflamed, especially about the borders of the affected parts, and present a pinkish or pinkish-red color, having a violaceous tinge. The sweat undergoes change and becomes offensive.

Is hyperidrosis acute or chronic?

Usually chronic, although it may also occur as an acute affection.

What is the etiology of hyperidrosis?

Debility is commonly the cause in general hyperidrosis; the local forms are probably neurotic in origin.

What is the prognosis?

The disease is usually persistent and often rebellious to treatment; in many instances a permanent cure is possible, in others palliation. Relapses are not uncommon.

What systemic remedies are employed in hyperidrosis?

Ergot, belladonna, gallic acid, mineral acids, and tonics. Constitutional treatment is rarely of benefit in the local forms of hyperidrosis, and external applications are seldom of service in general hyperidrosis. Precipitated sulphur, a teaspoonful twice daily, is also well spoken of, combined, if necessary, with an astringent.

What external remedies are employed in the local forms?

Astringent lotions of zinc sulphate, tannin and alum, applied several times daily, with or without the supplementary use of dusting-powders. Weak solutions of formaldehyde, one to one hundred, are sometimes of value.

Dusting-powders of boric acid and zinc oxide, to which may be added from ten to thirty grains of salicylic acid to the ounce, to be used freely and often:—

℞ Pulv. ac. salicylici, ............................ gr. x-xxx.
Pulv. ac. borici, ................................ ʒv.
Pulv. zinci oxidi, ............................... ʒiij M.

Diachylon ointment, and an ointment containing a drachm of tannin to the ounce; more especially applicable in hyperidrosis of the feet. The parts are first thoroughly washed, rubbed dry with towels and dusting-powder, and the ointment applied on strips of muslin or lint and bound on; the dressing is renewed twice daily, the parts each time being rubbed dry with soft towels and dusting-powder, and the treatment continued for ten days to two weeks, after which the dusting-powder is to be used alone for several weeks. No water is to be used after the first washing until the ointment is discontinued. One such course will occasionally suffice, but not infrequently a repetition is necessary.

Faradization and galvanization are sometimes serviceable. Repeated mild exposures to the Röntgen rays have a favorable influence in some instances.

Sudamen.

(Synonym: Miliaria crystallina.)

What is sudamen?

Sudamen is a non-inflammatory disorder of the sweat-glands, characterized by pin-point to pin-head-sized, discrete but thickly-set, superficial, translucent whitish vesicles.

Describe the clinical characters.

The lesions develop rapidly and in great numbers, either irregularly or in crops, and are usually to be seen as discrete, closely-crowded, whitish, or pearl-colored minute elevations, occurring most abundantly upon the trunk. In appearance they resemble minute dew-drops. They are non-inflammatory, without areola, never become purulent, and evince no tendency to rupture, the fluid disappearing by absorption, and the epidermal covering by desquamation.

Give the course and duration of sudamen.

New crops may appear as the older lesions are disappearing, and the affection persist for some time, or, on the other hand, the whole process may come to an end in several days or a week. In short, the course and duration depend upon the subsidence or persistence of the cause.

What is the anatomical seat of sudamen?

The lesions are formed between the lamellæ of the corneous layer, usually the upper part; and are thought to be due to some change in the character of the epithelial cells of this layer, probably from high temperature, giving rise to a blocking up of the surface outlet.

What is the cause of sudamen?

Debility, especially when associated with high fever. The eruption is often seen in the course of typhus, typhoid and rheumatic fevers.

How would you treat sudamen?

By constitutional remedies directed against the predisposing factor or factors, and the application of cooling lotions of vinegar or alcohol and water, or dusting-powders of starch and lycopodium.

Hydrocystoma.

Describe hydrocystoma.

Hydrocystoma is a cystic affection of the sweat-gland ducts, seated upon the face. The lesions may be present in scant numbers or in more or less profusion. They have the appearance of boiled sago grains imbedded in the skin; the larger lesions may have a bluish color, especially about the periphery. It is not common, and is usually seen in washerwomen and laundresses, or those exposed to moist heat. In some cases it tends to disappear during the winter months. There are no subjective symptoms.

Treatment consists of puncturing the lesions and application of dusting-powder. Avoidance of the exciting cause (moist heat) is important.

Anidrosis.

Describe anidrosis.

It is the opposite condition of hyperidrosis, and is characterized by diminution or suppression of the sweat secretion. It occurs to some extent in certain systemic diseases and also in some affections of the skin, such as ichthyosis; nerve-injuries may give rise to localized sweat-suppression.

Treatment is based upon general principles; friction, warm and hot-vapor baths, electricity and similar measures are of service.

Bromidrosis.

(Synonym: Osmidrosis.)

Describe bromidrosis.

Bromidrosis is a functional disturbance of the sweat-glands characterized by a sweat secretion of an offensive odor. The sweat production may be normal in quantity or more or less excessive, usually the latter. The condition may be local or general, commonly the former. It is closely allied to hyperidrosis, and may often be considered identical, the odor resulting from rapid decomposition of the sweat secretion. The decomposition and resulting odor have been thought due to the presence of bacteria.

What parts are most commonly affected in bromidrosis?

The feet and the axillæ.

What is the treatment of bromidrosis?

It is essentially the same as that of hyperidrosis (q. v.), consisting of applications of astringent lotions, dusting-powders, especially those containing boric acid and salicylic acid, and the continuous application of diachylon ointment. In obstinate cases weak formaldehyde solutions, Röntgen rays, and high-frequency currents can be tried.

Chromidrosis.