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REVIEW OF
LITERATURE:
History
Seborrheic dermatitis was first described by
Unna, who also suspected Malassezia furfur (Pityrosporum ovale) as a causative
factor. The nosologic position of seborrheic dermatitis was widely discussed
for decades, the focus resting on dysfunction of the sebaceous glands and the
high amounts of M. furfur present in scales of seborrheic dermatitis. In 1984
it was shown that seborrheic dermatitis could be suppressed by systemic
ketoconazole. This finding was corroborated by later studies, and it became
clear that seborrheic dermatitis was strongly linked to Pityrosporum yeasts (2).
Definition
Seborrheic dermatitis is a common, chronic
disorder characterized by greasy scales overlying erythematous patches or
plaques (3).
Seborrheic dermatitis has often been studied
under the heading of eczema, even though it has been separated from this
group of diseases since its description by Paul Gerson Unna (1850–1929) in
1887 (4).
Epidemiology
Seborrheic dermatitis
is separated into two age groups, an infantile self-limited form primarily
during the first 3 months of life and an adult form that is chronic. A male
predominance is seen in all ages.
The prevalence of seborrheic dermatitis is 3%–5% of young adults, and 1%–5%
of the general population (5).
Etiology
and pathogenesis
· The exact
pathogenesis of seborrheic dermatitis is yet to be fully elucidated, but this
dermatosis is commonly linked with the yeast Malassezia (5).
· The genus
Malassezia consists of lipophilic yeasts that are part of the normal resident
skin flora (2).
· Disturbance
in flora, lipase activity, and free oxygen radicals may be more closely linked
to seborrheic dermatitis (5).
· An
increased secretion of lipases and phospholipases has been shown in vivo in
patients with SD and this can lead to the formation of oleic acid, which
impairs epidermal barrier function and causes desquamation of scalp skin as
dandruff in susceptible individual.
· Raised
levels of cathepsin S and histamine have been identified in scalp samples
from patients with SD/dandruff and may play a role in the pruritus that usually
accompanies this complaint (6).
· Genetic
and environmental factor (6).
· Although
it is frequently seen in patients with Parkinson’s disease, in those who have
had cerebrovascular accidents, and in those with HIV infection, the
overwhelming majority of individuals with seborrheic dermatitis have no
underlying disorder (3).
Clinical presentation
Seborrheic
dermatitis is defined by clinical parameters, including:
·
sharply
demarcated patches or thin plaques that vary from pink–yellow to dull red to
red–brown with bran-like to flaky “greasy†scales; vesiculation and crusting
may occur but are rare and mostly due to irritation
· a
predilection for areas rich in sebaceous glands – scalp, face, ears (2).
· On the
face, seborrheic dermatitis affects the eyebrows, eyelids, glabella, and nasolabial
folds. Scaling of the external auditory canal is common in seborrheic
dermatitis. In addition, the postauricular areas often become macerated and
tender. Seborrheic dermatitis may also develop in the central chest, axilla,
groin, submammary folds, and gluteal cleft.
· Rarely, it
may cause widespread generalized dermatitis.
· Pruritus
is variable (3).
Clinical
variant
· • Infantile seborrheic dermatitis
The
infantile form occurs during the first few weeks to 3 months of life, is
self-limited. It is commonly concentrated on the vertex of the scalp (i.e.,
cradle cap) with adherent, yellow–brown, greasy scale, which can sometimes
spread to the entire scalp with inflammatory, erythematous, and oozing
crusts. Lesions can be seen on the face, neck and can be disseminated to the
trunk and extremities with inflammatory glistening plaques in intertriginous
sites such as the axillae and groin.
• Adult seborrheic
dermatitis
The adult form on the other hand, tends to be
chronic and can persist from the fourth through the seventh decades of life,
with a peak at age 40.
Lesions may also be seen on the face with
prominent symmetry, particularly medial eyebrows, forehead, upper eyelids,
nasolabial folds, and lateral nares. Other sites commonly involved include
retroauricular regions, external auditory canal, auricle, and, scalp,
occiput, and neck. The presternal region of the chest, upper back and umbilicus
can be involved as well (5).
- Blepharitis: Inflammation of the anterior
eyelid margin may occur in SD and presents with flaky debris on the
eyelashes.
- Petaloid pattern: In men, involvement of
the presternal area is typical with petalâ€shaped lesions that may be localized.
- The ‘pityriasiform’ variant of Seborrheic
dermatitis comprises a generalized erythematosquamous eruption (6).
Diagnosis
-The diagnosis is usually made on clinical
grounds without the need for diagnostic tests.
-HIV testing
-Dermoscopy
-Histopathology (6)
Differential
diagnosis
-Atopic dermatitis
-Irritant diaper dermatitis
-Tinea capitis
-Pityriasis amiantacea
-Pityriasis rosea
-SLE (2)
-Scabies
-Psoriasis (5)
Classification
of severity
The
severity of Seborrheic Dermatitis and dandruff is highly variable.
· A clinical
score termed the seborrheic dermatitis area severity index (6,7).
·
Establishment of clinical evaluation criteria for
scalp seborrheic dermatitis (SSD) (8).
Complication
Leiner’s disease (5)
Malassezia (Pityrsporum) folliculitis (2)
Treatment
Treatment with low-potency topical
glucocorticoids in conjunction with a topical antifungal agent, such as
ketoconazole cream or ciclopirox cream, is often effective. The scalp and
beard areas may benefit from antidandruff shampoos. High-potency topical
glucocorticoid solutions (betamethasone or clobetasol) are effective for
control of severe scalp involvement (3).
Homoeopathic approach
When an individual becomes sick, he becomes
unwell overall not only part, so we have to look at all of his symptoms and
treat as a whole. For that homoeopathic specific remedy as per the basic
principle “Similia similibus curentur†should be searched.
As
mentioned in § 217 -In
homeopathy, a physician must carefully investigate the symptom totality to
find a homoeopathic medicinal disease agent to remove disease, by considering
physical, mental and emotional state of which express the individual as a
whole (9).
As
mentioned in § 118-Every
medicine exhibits in the human body specific effects that do not occur from
any other medicinal substance (9),
exactly in the same manner individuals require specific remedies in treating
the illness.
As
mentioned in § 153-
In search of homoeopathic specific remedy, close attention should be given to the more striking, strange, unusual, peculiar (characteristic)
signs and symptoms in the case, because it is these above all which must
correspond to very similar symptoms in the homoeopathic materia medica being
searched, then remedy to be the one most suitable for the cure (9).
Some homoeopathic medicine can be used as
therapeutic when indicated in case. The most serviceable internal remedies
are the following:
· Ammonium
mur. -Large accumulation of bran- like scales, with falling off of the hair.
· Mercurius
sol.-Seborrhea of the genitals, accompanied with hyperemia.
· NATRUM
MUR. - Severe itching of the scalp. The hair falls out in masses. Seborrhea
of the face.
· Potassium(KALI)
bromide. -Seborrhea on hairy portions of the face, forehead and neck.
· Sepia
-Seborrhea of the genitals in women.
· Thuja
-White scaly dandruff. Hair dry and falling off (10)
· Graphites
-Eruption exudes a transparent, glutinous fluid, which causes the crusts to
fall off; then more form, to fall again in turn, eruption spreading more and
more over a large surface.
· Oleander
-Eruption on scalp and back of ears, oozing a fluid and breeding vermin;
chafing about neck or between scrotum and thighs.
· Mezereum
-Child scratches face continually, which becomes covered with blood; face and
forehead red and hot, with great restlessness and peevishness; the ichor from
the scratched face excoriates other parts; honey- like scab around mouth.
· Psorinum
-Moist, suppurating, fetid eruption, pustules and boils on scalp and head
which look dirty and emit an offensive odor; hair lusterless, tangles easily.
· Rhus tox.
-A bright edge of inflammation surrounds every portion of the eruption, with
much itching, particularly at night; eruption moist, suppurating, forming
thick crusts, offensive itching; hair is eaten off; extends to shoulders;
scalp sensitive, < on side not lain on, when growing warm in bed, from
touch and combing hair back.
· Viola tric-Burning
and itching milk-crust, with discharge of tough yellow pus; exudation very
copious; thick incrustations, pouring out copiously a thick yellow fluid,
which agglutinates the hair; heat and perspiration of face after eating;
urine of strong odor, like cat’s urine; during sleep hands twitch, thumbs are
clenched, face is red and the whole body feels hot and dry, < at night (11).
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