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As
elsewhere, cancer is one of the leading causes of death in China. It is
characterized by the uncontrollable growth of cells originating from abnormal
tissues which can kill the host by means of local extension or distant spread
(metastasis). The etiology of cancer is not completely clear, but the
fundamental mechanisms governing the etiology of human cancer have recently
become clearer as new information about cancer genes, viruses, carcinogens, cell
growth and differentiation emerges.
Over
the past three decades, Chinese researchers have studied the role of traditional
Chinese medicine in treating cancer. They have obtained significant results.
Etiology
and Pathogenesis
1.
Insufficient vital essence
Insufficient
vital essence causes deficiency syndromes. Since various deficiency syndromes
may occur in cancer patients, insufficient vital essence is considered the basic
pathogenesis of cancers. Insufficient vital essence results from congenital
defects, senility, protracted illness, overexertion, improper diet, over
indulgence in sexual activity or invasion by exogenous pathogenic factors.
2.
Blood stasis and phlegm accumulation
Traditional
Chinese medicine holds that cancerous tumors are the result of blood stasis or
phlegm accumulation or both. Qi activates and governs blood circulation.
Deficiency of qi may cause blood stasis. Stagnation of qi, which is usually due
to an emotional upset or affection by exopathogens, is another common factor
that impedes the normal flow of blood and results in blood stasis and eventually
tumor formation. Accumulation of phlegm is related to the various deficiency
sates described above, particularly deficiency of spleen qi characterized by
failure in transporting and transforming the refined substances from food and
water which leads to the formation of phlegm.
3.
Invasion of exogenous pathogenic factors
Exogenous
pathogenic heat or cold can invade the body, disturb the smooth flow of qi and
blood and, as a result, cause the retention of qi and blood and the formation of
tumors.
Differential
Diagnosis of Syndromes
1.
Qi deficiency
Primary
manifestations: general lassitude, shortness of breath, weak breathing and
speaking, spontaneous sweating that worsens on exertion, pale tongue with thin,
white coating and weak pulse.
Conditions
associate with cough and expectation of copious thin sputum indicate a
deficiency of lung qi; poor appetite, fullness in the abdomen after meals, loose
stool or edema indicate a deficiency of spleen qi; palpitations or arrhythmia
may appear in cases with deficiency of heart qi.
2.
Yang deficiency
Primary
manifestations: intolerance of cold, cold limbs, slow pulse with the
manifestations of qi deficiency.
Deficiency
of kidney yang is manifested as weakness of the loins and knees, impotence,
frequent urination at night, incontinence of urine, diarrhea before dawn or
edema complicated by the general manifestations of yang deficiency.
3.
Blood deficiency
Primary
manifestations: Pallor or sallow complexion, pale tongue with thin, white
coating and thready pulse. Additional manifestations may include palpitations,
insomnia, amnesia and dream-disturbed sleep, suggesting deficiency of heart
blood; blurred vision, dizziness, ringing in the ears, numbness of the hands and
feet or scanty menstrual flow, indicate deficiency of liver blood.
4.
Yin deficiency
Primary
manifestations: Dry mouth with preference for beverages, absence of tongue
coating, constipation and concentrated urine, indicating consumption of body
fluids; feverish sensation in the palms, sole, and chest, afternoon fever, night
sweating, deep red tongue without coating and fine rapid pulse, suggesting
interior heat due to yin deficiency. Patients with yin deficiency, suffering
from restlessness, dizziness, dryness of the eyes, nocturnal emissions, soreness
and weakness of the loins and knees, can be diagnosed as having yin deficiency
of the liver and kidneys. Those with yin deficiency, suffering from dry cough or
cough with expectation of scanty, sticky sputum, can be diagnosed as having yin
deficiency of the lungs.
5.
Stagnation of liver qi
Primary
manifestations: Fullness and distending pain in the hypochondriac regions,
irritability, belching, loss of appetite, distending sensations in the breast,
thin, white tongue coating and taut pulse.
6.
Blood stasis
Primary
manifestations: Fixed pain or mass in a given region of the body, petechiae or
bleeding, dark complexion, dry scaly skin, dysmenorrhea with discharge of
dark-red blood or clots, purple or dark-red tongue and fine and hesitant pulse.
7.
Phlegm-dampness
Primary
manifestations: Cough, expectations of mucoid white sputum, loss of appetite,
abdominal distension, white, greasy tongue coating and slippery pulse.
Treatment
1.
Qi deficiency
Principle
of treatment: Invigorate qi.
Formula
of choice: Four Gentlemen Decoction; the most commonly used herbs to
tonify qi: Ginseng, codonopsis root, and astragalus root. For deficiency of lung
qi, use Lung-Tonifying Decoction, in which ginseng, astragalus root, replenish
lung qi, tangerine peel and aster root descend lung qi and prepared rehmannia
root and schisandra berry invigorate the kidneys, the root of qi.
For
deficiency of spleen qi, Ginseng, Poria, Ovate Atractylodes Powder is an
effective formula. It includes the ingredients of the decoction of Four
Gentleman Decoction, as well as lablab bean, dioscorea root, coix seed, and
lotus seed which invigorate spleen qi; amomum fruit which enlivens the spleen
and strengthens the action of principal drugs; and platycodon root which acts as
guiding drug. For the cases with deficiency of heart qi, use Heart-Nourishing
Decoction, in which ginseng, astragalus root, licorice root, and schisandra
berry replenish heart qi; cinnamom bark invigorates heart yang; tangkuei and
ligusticum root nourish the heart blood; and jujube, poria, polygala root and
biota seed ease the mind.
2.
Yang deficiency
Principle
of treatment: Replenish yang with herbs warm in nature.
Formula
of choice: Aconite Center-Rectifying Decoction for deficiency of spleen yang; in
this formula, prepared lateral root of aconite and blast-fried ginger, both of
which are pungent in flavor and hot in property, restore yang of the spleen and
stomach by warming the middle-warmer to dispel cold; add ginseng, ovate
atractylodes root and licorice root to replenish qi and strength the spleen.
Right-Restoring
is an effective recipe for treating deficiency of kidney yang.
3.
Blood deficiency
Principle
of treatment: Nourish blood.
Formula
of choice: Four Ingredients Decoction to replenish liver blood; the treatment of
blood deficiency is usually combined with herbs that invigorate qi and nourish
the kidneys, for example, Tangkuei Blood-Supplementing Decoction, which includes
a large dosage of astragalus root; Spleen-Returning Decoction is frequently
prescribed for deficiency of heart blood.
4.
Yin deficiency
Principle
of treatment: Nourish yin and increase body fluids.
Formula
of choice: Since yin deficiency frequently causes heat, methods for nourishing
yin are often used with those for expelling heat; use Major Origin-Supplementing
Decoction to treat yin deficiency of the liver and kidneys, in which ginseng,
dioscorea root and licorice root replenish the spleen, prepared rehmannia root
and tangkuei nourish liver yin and cornus fruit and lycium berry
invigorate kidney yin.
Deficiency
of lung yin can be treated with Lily Bulb Metal-Securing Decoction, in which
rehmannia root nourishes yin and clears away heat from the blood; ophiopogon
root, scrophularia root and lily bulb nourish yin, ,moisten the lungs, remove
phlegm and arrest cough; tangkuei and white peony root invigorate blood and
nourish yin; and licorice root and platycodon root eliminate phlegm and
coordinate the effects of the other ingredients in the formula.
5.
Stagnation of liver qi
Principle
of treatment: Regulate liver qi.
Formula
of choice: Bupleurum Liver-Soothing Powder.
6.
Blood stasis
Principle
of treatment: Promote blood circulation to remove blood stasis.
Formula
of choice: Infradiaphragmatic Stasis-Expelling Decoction, in which tangkuei,
ligusticum root, peony root, peach kernel, carthamus flower, flying squirrel's
droppings, moutan bark promote blood circulation to remove blood stasis, and
cyperus root, bitter orange, lindera root and corydalis tuber regulate qi to
alleviate pain.
7.
Phlegm-dampness
Principle
of treatment: Remove dampness and phlegm.
Formula
of choice: Stomach-Calming Powder and Six Gentlemen Decoction; in these recipes,
ginseng, ovate atractylodes root, poria, and licorice root invigorate qi,
strengthen the spleen and eliminate dampness; atractylodes root and pinellia
root are added to remove dampness, magnolia bark and tangerine peel regulate qi
and dispel wetness and ginger and jujube to regulate the function of the
stomach.
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