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I. Features
A. Appearance
The skin is involved in essentially all patients with Ehlers-Danlos
Syndrome. That is not surprising since we have recently learned that
collagen, the major structural substance found in skin is abnormal in
some forms of Ehlers-Danlos Syndrome and suspect that it will be found
to be abnormal in other forms. Although we now recognize more than ten
types of Ehlers-Danlos Syndromes, many patients do not easily fit into
recognized categories. Nonetheless, most manifestations of the disease,
including skin involvement, tend to be somewhat similar among affected
members of a family. If the manifestations of the disease are mild in
one member of a family, they ordinarily are mild in other affected
members.
The most common type of skin involvement in Ehlers-Danlos Syndrome
is very soft skin. This has been called "skin you love to touch". In
many cases, this skin would not be perceived as being unusual and would
only be noticed by an experienced physician. The texture of the skin
often feels velvety, much like a chamois skin. Frequently the feeling
is more doughy, which may be related to the abnormal underlying
connective tissue structure. The skin is uniformly thin and this
feature, as well as abnormal connective tissue structure can be
appreciated when the skin is examined under the microscope. Frequently
this thinness results in a pale complexion through which underlying
blood vessels are easily seen. In Many patients with Ehlers-Danlos
Syndrome, the skin is easily stretched, and in some cases, may almost
be like a rubber suit. In contrast, skin on the palms and soles and
sometimes over the tops of the hand and feet is often loose fitting and
wrinkly. Although the skin is ordinarily tight-fitting during childhood
and early adult life, it frequently begins to sag during middle life so
that premature wrinkling is seen in older patients with Ehlers-Danlos
Syndrome. Wrinkly skin may also be present in the newborn and such
patient may be misdiagnosed as having cutis laxa, another inherited
disorder of connective tissue with similar, but different, features
than Ehlers-Danlos Syndrome.
B. Fragility and Wound Healing
In some patients the skin can be extremely fragile and splits
easily with minimal injury. This is especially true in young children
and from some patients, it can be a continual problem and cosmetic
nightmare. To compound the problem, would healing is often abnormal,
resulting in widened, thinned, disfiguring scars. Would healing is
delayed so that occasionally weeks and even months are needed for
appropriate scar tissue to form. The resultant scars are often quite
thin and of poor quality. In some cases the skin is so fragile that it
is difficult to properly close the wound with stitches to achieve an
optimal cosmetic result. The stretchy nature of skin and poor
underlying connective tissue sometimes causes lacerations to appear
larger and more serious than one would expect. Because the skin is
easily stretched, under these circumstances, the wound edges can
ordinarily be brought together for appropriate closure.
Occasionally, trauma may result in breaks in the connective tissue
of the skin so that the underlying fat herniates and later develops
calcium deposits. This results in pea to grape-sized bumps ordinarily
over the elbows and knees which are sometimes called "pseudotumors". In
addition, patients with Ehlers-Danlos Syndrome may have small, hard
calcified lumps under the skin which probably are related to injury and
subsequent repair. These processes are in no way dangerous, and are not
related to cancer.
C. Bruising
Patients with Ehlers-Danlos Syndrome usually bruise easily.
Sometimes the resulting bruise is quite extensive, but ordinarily,
clotting of the blood is normal. The bruising results from a problem in
the structure of the underlying connective tissue so that it is
difficult for blood vessels to close themselves after they are damaged.
Moreover, they are more easily damaged because the connective tissues
holding them together is abnormal. In a sense, it is like poking
pin-sized hole in a rubber sheet. Before long, the hole becomes much
larger than pin-sized. In a simple sense, this is what happens to the
blood vessels when they are injured.
D. Varicose Veins
Since connective tissue in the entire body is involved as well as
the skin, this may lead to other manifestations. Varicose veins,
particularly on the lower extremity are common in Ehlers-Danlos
Syndrome. In some forms of Ehlers-Danlos Syndrome, this can be extreme.
II. Management
A. Ascorbic Acid (Vitamin C)
I recommend to my patients with Ehlers-Danlos Syndrome that they
take 2 to 4 grams of ascorbic acid daily. Children, of course, are
given appropriately lower doses. This medication should be taken with a
full glass of water or other fluid. Ascorbic acid is ordinarily safe,
although it is metabolized by the body to oxalic acid. This compound
may be found as a part of some kidney stones. For this reason, it is
important to make sure that the patient not have previous kidney stones
or a history of kidney stones in the family. Under these circumstances,
the advice of a physician is imperative. Doses larger than those
recommended are not appropriate and will not be of additional value.
All ascorbic acid, regardless of source, is the same and comparison
shopping is encouraged. We find that ascorbic acid is a big help with
the bruising and in many cases, has improved wound healing and muscular
strength. Recently, we have learned in the laboratory, that Vitamin C
instructs the body to make collagen.
B. Wound Repair
In those families afflicted with poor wound healing, one of the
most disappointing results is the cosmetic disfigurement that may
result. This ordinarily occurs in the first three or four years of life
and is a result of the thin, fragile skin and poor wound healing.
Injury is especially risky as the child attempts to learn how to walk
on loose, unstable joints. During this period, extra care is necessary
to prevent falls. Furniture needs to be appropriately padded or
avoided, and any obstacles such as loose carpets need to be removed. An
ounce of prevention is extremely important here. When lacerations
occur, appropriate care is important. Such families should enlist the
services of a Plastic Surgeon who knows about this disorder so that
optimal results can be anticipated. Because of fragility of the skin
and underlying connective tissue, it is often necessary to utilize
special closure techniques to achieve good results. This includes
taping as well as suturing. In some cases, joints need to be partially
immobilized to maximize the results. Control of superinfection of
wounds is critical for optimum healing. Regular application of
mupiricin ointment is recommended during healing.
C. Prevention of Wrinkles
Because the skin is already thin in Ehlers-Danlos Syndrome,
premature aging of the skin is an added risk. Since the sun markedly
accelerates this process, it is prudent to protect exposed skin from
the sun. Sunscreen should be used daily, but especially when sun
exposure is contemplated. Several high quality sunscreens are available
on the market, and patients should consider one rated SPF-15 from the
many available. Sunscreens can be obtained in cream, lotion or clear
gel formulations. In addition, some formulations are water resistant.
Since patient acceptance usually dictates choice, the best approach is
to try several of the products and judge for yourself. Elizabeth Arden,
Clinique, PreSun, Sun Block, Sundown, Eclipse and Piz Buin are a few
products to choose from. A wide-brimmed hat is a simple and effective
measure. Care should especially be taken with infants and children to
protect them when they are in the sun.
D. Prevention of Bleeding
Since easy bruising is common in Ehlers-Danlos Syndrome,
medications which affect clotting are contraindicated. Acetaminophen is
recommended for pain instead of aspirin or non-steroidal
anti-inflammatory agents such as Ibuprofen. Heparin and cormadin
derivatives are particularly risky.
E. Treatment of Varicosities
Support hosiery such as Sig Varis or Medistrumpf is recommended at
all times to prevent worsening of varicosities related to Ehlers-Danlos
Syndrome.
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