ANATOMY
A 1-way system that returns lymph via
vessels to the CVS.
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Consists of:
Fluid, known as lymph
Vessels that transport lymph
Organs that contain lymphoid tissue (eg,
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lymph nodes, spleen, and thymus)
Organ
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FunctionLymph
Contains nutrients, oxygen, hormones, and fatty acids, as
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well as toxins and cellular waste products, that are
transported to and from cellular tissues
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Lymphatic vesselsTransport lymph from peripheral tissues to the veins of the
cardiovascular system
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Lymph nodes
Monitors the composition of lymph, the location of pathogen
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engulfment and eradication, the immunologic response, andthe regulation site
Spleen
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Monitors the composition of blood components, the location
of pathogen engulfment and eradication, the immunologic
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response, and the regulation siteThymus
Serves as the site of T-lymphocyte maturation, development,
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and control
Functions are :
Restoration of excess interstitial fluid and
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proteins to the blood
Absorption of fats and fat-soluble vitamins from
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the digestive systemDefense against invading organisms
LYMPH
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Fluid derived from plasma.
Contains nutrients, oxygen, and hormones, as
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well as toxins and cellular waste.This fluid is removed by lymphatic vessels that
pass through lymph nodes.
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As the lymph passes through the lymph nodes,
lymphocytes and monocytes enter it.
LYMPHATIC VESSELS
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Are blind-ended tubes with thin endothelial
walls.
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Coalesce to form larger meshlike vessels.Eventually form 2 lymphatic ducts: the right
lymphatic duct and the thoracic duct.
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Have 1-way valves to prevent any backflow.LYMPH NODES
Bean-shaped structures
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Filter the lymph before it rejoins the bloodstream.
Approximately 600-700, predominantly in the
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neck, axillae, groin, mediastinum, and
mesenteries of the GI tract.
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Constitute a main line of defense by hosting 2types of immune protective cell lines, T and B
lymphocytes.
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2 distinct regions, the cortex and the medulla.
The cortex contains follicles, which are collections
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of lymphocytes.Center of the follicles is called germinal centers
that has B-lymphocytes while the remaining cells
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of the cortex are T-lymphocytes.
Vessels entering the lymph nodes are called
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afferent lymphatic vessels and those exiting arecalled efferent lymphatic vessels
LYMPHADENOPATHY
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ETIOLOGYFive broad etiologic categories :
An immune response to infective agents (eg,
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bacteria, virus, fungus)
Inflammatory cells in infections involving the
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lymph nodeMetastasis
Malignancy of lymphocytes or macrophages (eg,
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leukemia, lymphoma)
Storage disorders
PRESENTATION
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Duration
Associated symptoms
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Past illnesses, infections, local trauma, or bites.Constitutional symptoms.
If recurrent infections, HIV must be considered.
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Family and social history
PHYSICAL EXAMINATION
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Complete general examination.The skin and the soft tissue drained by the
enlarge node should be carefully examined.
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The character of the lymph node should be noted.
Whether the lymphadenopathy is a local or a
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general phenomenon.GENERALIZED LYMPHADENOPATHY:
Upper respiratory tract infections (rhinovirus,
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adenovirus, influenzavirus, parainfluenza virus,respiratory syncytial virus)
Epstein-Barr virus (EBV)
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Cytomegalovirus (CMV)Varicella-zoster virus
Herpes simplex virus
Paramyxovirus
Coxsackieviruses A and B
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EchovirusEnterovirus
Human herpesvirus-6
Human immunodeficiency virus
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WORK UPLABORATORY STUDIES
Perform the least invasive test that provides the
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most information.CBC .
Serum LDH- to determine the turnover rate of
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cells in the case of leukemia or lymphoma.
Tuberculin skin test.
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Monospot and titers for EBV, CMV, catscratchdisease, or toxoplasmosis
IMAGING STUDIES
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Chest radiography to assess for bacterial
pneumonias or tuberculosis, and hilar
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adenopathy in the case of malignancy.Ultrasonography.
CT scan.
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18F-FDG PET.
FNAC
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BIOPSYLYMPHEDEMA
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?Lymphatic obstruction?Dec. lymphatic transport
?Stagnation of HMW proteins
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? High protein edema? High oncotic pressure in the interstitium
favors the accumulation of additional water.
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? Massive dilatation of lymphatic vessels
? Inflammation
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? Shrunken and hard lymph nodesDERMATOLOGIC PATHOLOGY
The overlying skin becomes thickened and
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displays the peau d'orange appearance.
Chronic lymphedema causes fissuring and
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impairment of the epidermis, allowing bacteria toenter and grow, and leading to lymphorrhea, the
leakage of lymph.
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With chronic lymphedema, the development of
verrucous, cobblestone plaques, a condition
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known as elephantiasis nostra verrucosa (ENV),can occur.
ETIOLOGY
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In primary lymphedema, there is congenitalhypoplasia or aplasia of the peripheral
lymphatics or valvular incompetence.
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In secondary lymphedema, the lymphatic
drainage is blocked due to:
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Recurrent attacks of lymphangitisMalignancy
Obesity
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Surgery
PRIMARY LYMPHEDEMA
A developmental abnormality of the lymphatic
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system.
3 main types, distinguished by their age of onset:
1. Congenital lymphedema (Milroy disease)
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2. Lymphedema praecox (Meige disease)3. Lymphedema tarda
Involve the lower extremities almost exclusively.
CONGENITAL LYMPHEDEMA
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10-25% of all primary lymphedema cases.Autosomal-dominant.
Anaplastic lymphatic channels.
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Manifests at birth or later, up to age 1 year.
F:M= 2:1.
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LL:UL= 3:1The edema is most commonly pitting and non
painful.
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2/3 rd of patients have bilateral lymphedema.
May improve spontaneously with increasing age.
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LYMPHEDEMA PRAECOXMost common form of primary lymphedema (65-
80%).
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Becomes clinically evident after birth and before
age 35 years.
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F:M= 4:1About 70% of cases are U\L.
A hypoplastic pattern, with the lymphatics
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reduced in caliber and number.
LYMPHEDEMA TARDA
Manifests later in life, usually in persons older
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than 35 years.
Caused by a defect in the lymphatic valves,
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resulting in incompetent valve function.Accounts for only 10% of cases.
ASSOCIATED CONDITIONS
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Distichiasis lymphedema syndrome is
lymphedema associated with distichiasis (double
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row of eyelashes).Vertebral abnormalities, spinal arachnoid cysts,
hemangiomas, cleft palate, ptosis, short stature,
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webbed neck, strabismus, thoracic duct
abnormalities, and microphthalmia.
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Associated with yellow nail syndrome.ASSOCIATED CONDITIONS
Other genetic syndromes and cutaneous
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conditions associated with primary lymphedemainclude the following:
Turner syndrome
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Noonan syndrome
Klinefelter syndrome
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Neurofibromatosis type 1Hemangiomas
Xanthomatosis
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Congenital absence of nails
SECONDARY LYMPHEDEMA
SECONDARY LYMPHEDEMA
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Caused by an acquired defect in the lymphatic
system.
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Associated with obesity, infection, neoplasm,trauma, and therapeutic modalities.
SECONDARY LYMPHEDEMA
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1.Filariasis
The most common cause of secondary
lymphedema.
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Caused by a mosquito-borne nematode infection
with the parasite Wucheria bancrofti.
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Commonly occurring in developing countriesaround the world.
Results in permanent lymphedema of the limb.
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SECONDARY LYMPHEDEMA2. Malignancy and cancer treatment
Obstruction from metastatic cancer or primary
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lymphoma or secondary to radical lymph nodedissection and excision.
The most commonly affected area is the axillary
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region after mastectomy
Lymphedema can also be seen after regional
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dissection of pelvic, para-aortic, and neck lymphnodes.
SECONDARY LYMPHEDEMA
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Other causes
Trauma
Varicose vein surgery
Congestive heart failure
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Portal hypertensionPeripheral vascular surgery
Lipectomy
Burns
Burn scar excision
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Insect bitesExtrinsic pressure
CLINICAL PRESENTATION
HISTORY
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Chronic swelling of an extremity.
First noticed by the patient as an asymmetry or
increased circumference of an extremity.
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As swelling slowly progresses, patients may have
difficulty fitting into clothing.
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May cause fatigue due to the size and weight of theextremity, embarrassment in public, and severe
impairment of daily activities.
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Recurrent bacterial or fungal infections.
Fevers, chills, and generalized weakness.
History of recurrent episodes of cellulitis,
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lymphangitis, fissuring, ulcerations, and/or verrucouschanges.
HISTORY
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In primary lymphedema, the history of onset is moretypical. Associated with other anomalies and genetic
disorders.
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In secondary lymphedema, the associated history is
based on the primary etiology.
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If due to filariasis, the history should include travel orhabitation in an endemic area.
Other patients should have a clear history of a
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neoplasm obstructing the lymphatic system, recurrent
episodes of lymphangitis and/or cellulitis, obesity,
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trauma, or lymphedema resulting after surgeryand/or radiation therapy.
A recent history of varicose vein surgery also is
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reported.
PHYSICAL EXAMINATION
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The earliest symptom is nontender, pitting edemaprogressing to a nonpitting one
Radial enlargement of the area.
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Involvement of the distal extremities is followed
by proximal advancement.
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Erythema and peau d'orange of skin.Grade (Brunner)
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Clinical featuresSubclinical (latent)
There is excess interstitial fluid
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and
histological abnormalities in
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lymphaticsand lymph nodes, but no clinically
apparent lymphoedema
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I
Oedema pits on pressure and
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swellinglargely or completely disappears
on
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elevation and bed rest
II
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Oedema does not pit and does notsignificantly reduce upon
elevation
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III
Oedema is associated with
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irreversible skinchanges, i.e. fibrosis, papillae
ELEPHANTIASIS NOSTRA VERRUCOSA
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ENV is an area of cobble-stoned, hyperkeratotic,papillomatous plaques most commonly seen on
the shins.
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The plaques can be weepy or oozing a clear or
yellow fluid.
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Fissuring, ulcerations, skin breakdown.Superinfection is common and can manifest as
impetigo with yellow crusts.
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EXAMINATIONA positive Stemmer sign (inability to pinch the
dorsal aspect of skin between the first and second
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toes)
Patients with congenital lymphedema may also
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present with recurrent cellulitis, papillomatosis,large caliber leg veins, and upsloping "ski-jump"
toenails.
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DIFFERENTIALS
Deep vein thrombosis
Hypoalbuminemia
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Renal failureLipedema
Postoperative complications
Baker cyst
Idiopathic edema
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Congestive heart failureIdiopathic edema
Neurofibromatosis
Sclerema neonatorum
Features of lipoedema that help differentiate it from
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lymphoedema
Occurs almost exclusively in women
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Onset nearly always coincides with pubertyNearly always bilateral and symmetrical
Involvement of trunk
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The feet are not involved, leading to an inverse
shouldering effect at the malleoli
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No pittingNo response to elevation or compression
No skin changes of lymphoedema (negative Stemmer's
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sign)
MRI shows subcutanteous fat but no fluid
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accumulationWORKUP OF LYMPHEDEMA
Liver function, blood urea nitrogen
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(BUN)/creatinine levels, and urinalysis resultsshould be checked if a renal or hepatic etiology is
suspected.
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Specific markers should be checked if a neoplasm
is suspected.
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CBC with differential should be checked if aninfectious etiology is being considered.
An indication for CT scanning or MRI is suspicion
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of malignancy.
MRI is useful to show lymph trunk anatomy and
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causes of obstructive secondary lymphedema.Ultrasonography to evaluate the lymphatic and
venous systems.
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Lymphangiography is now rarely used because of
the potential adverse effects.
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Fluorescence microlymphography demonstrates alack of microlymphatics.
Lymphoscintigraphy.
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TREATMENT OF LYMPHEDEMAThe goal is to restore function, reduce physical
and psychologic suffering, and prevent the
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development of infection.
Initiate therapy as early as possible before
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extensive, irreversible fibrosclerotic changesoccur in the interstitium.
Strict compliance is essential.
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The majority of compliant patients can be treated
successfully with conservative measures
1.HYGIENE AND SKIN CARE
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Appropriate skin care to prevent recurrent
cellulitis or lymphangitis.
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Meticulous hygiene to remove keratinous debrisand bacteria.
Cleanse the skin regularly and dry thoroughly.
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Regular inspection is necessary to identify any
open wounds or developing cellulitis.
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2.PHYSICAL THERAPY AND COMPRESSIONThe first-line treatment.
Aimed at improving lymphedema with manual
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lymphatic drainage, massage, and exercise.
It advocates the use of compression stockings (at
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a minimum of 40 mm Hg), multilayer bandaging,or pneumatic pumps.
Encourage patients to lose weight, avoid minor
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trauma, and avoid constrictive clothing that
might have a tourniquet effect.
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Encourage elevation of the affected extremitywhenever possible, particularly at night.
3. SURGERY
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Surgical treatment is palliative, not curative,and it does not obviate the need for continued
medical therapy.
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Surgical treatment is reserved for patients who
do not improve with conservative measures or for
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cases in which the extremity is so large that itimpairs daily activities and prevents successful
conservative management.
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Surgical procedures are classified as physiologic
or excisional.
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PHYSIOLOGIC SURGERYPhysiologic procedures attempt to improve
lymphatic drainage. Multiple techniques have
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been described, including omental transposition,
buried dermal flaps, enteromesenteric bridging,
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lymphangioplasty, and microvascularlympholymphatic anastomosis.
EXCISIONAL SURGERY
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Excisional techniques remove the affected tissues,thus reducing the lymphedema-related load.
The Charles procedure is a radical excisional
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technique. This procedure involves the total excision
of all skin and subcutaneous tissue from the affected
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extremity. The underlying fascia is then grafted,using the skin that has been excised. This technique
is extreme and is reserved for only the most severe
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cases.
Complications include ulceration, hyperkeratosis,
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keloid formation, hyperpigmentation, weepingdermatitis, and severe cosmetic deformity.
A variant of the Charles procedure, total superficial
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lymphangiectomy, involves debulking of the entire
limb.
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COMPRESSION THERAPYPatients should use compression garments
continuously during the day.
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They should also have graduated compression that
increases from distal to proximal on the affected
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extremity.Intermittent pneumatic pump compression therapy
provides sequential, active compression from distal to
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proximal, effectively milking the lymph from the
extremity.
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This treatment is most appropriately used prior tofibrosclerotic evolution, which it assists in preventing.
Contraindications to intermittent pneumatic pump
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compression therapy include congestive heart failure,
deep vein thrombosis, and active infection.
MLD
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Manual lymphatic drainage according to the
Vodder and/or Leduc techniques.
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Compression garments are essential betweentreatments.
Manual massage of the affected extremity; this
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recruits collateral vessels, allowing the
accumulated lymph to be drained into
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neighboring regions with normally functioninglymphatics.
PHARMACOLOGIC THERAPY
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Cellulitis
At the earliest signs of infection, institute topical or
systemic antifungal or antimicrobial therapy to prevent the
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development of sepsis.
Filariasis
Filariasis has been treated with DEC and albendazole
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BenzopyronesThese drugs bind to accumulated interstitial proteins,
inducing macrophage phagocytosis and proteolysis. The
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resulting protein fragments pass more readily into thevenous capillaries and are removed by the vascular system.
The benzopyrones aid in decreasing excess edematous fluid,
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softening the limb, decreasing skin temperature, and
reducing the number of secondary infections. Of note,
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however, is that hepatotoxicity has been associated withcoumarin therapy.
PHARMACOLOGIC THERAPY
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RetinoidsHelp normalize keratinization and decrease
inflammatory and fibrotic changes.
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Topical agents
Topical emollients and keratolytics have been
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recommended to improve secondary epidermalchanges.
What every patient with lymphoedema should receive
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An explanation of why the limb is swollen and theunderlying cause
Guidance on skin hygiene and care and the avoidance of
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acute infective episodes
Anti-fungal prophylactic therapy to prevent athlete's foot
Rapid access to antibiotic therapy if necessary, hospital
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admission for acute infective episodes
Appropriate instructions regarding exercise therapy
Manual lymphatic drainage (MLD)
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Multilayer lymphoedema bandaging (MLLB)Compression garments and, if appropriate, specialised
footwear
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Advice on dietAccess to support services and networks