Ads Google

Monday, February 4, 2019

CANCER OF THE ESOPHAGUS


Malignant lesions of the esophagus occur in four types worldwide: squamous cell, adenocarcinoma, carcinosarcoma, and sarcoma.
Pathophysiology and Etiology
Incidence
  • Incidence of adenocarcinoma of the distal and middle third of the esophagus appears to be increasing in the Western world.
  • Squamous cell carcinoma, most often originating in the upper half of the esophagus, appears to have an incidence equal to adenocarcinoma.
  • Highest rate in the United States occurs in men, who are usually older than age 60; more common in nonwhite males.
Associated Factors
Cause is unknown but has been associated with:
  • Barrett's esophagus.
  • Achalasia.
  • Chronic use of alcohol and tobacco (squamous cell carcinoma).
  • Genetic predisposition—nonwhite male population.
    P.655

  • Ingestion of caustic substances (such as lye), which cause esophageal strictures.
  • Other head and neck cancers.
Clinical Manifestations
  • Dysphagia is the usual presenting symptom, although it is a late sign, by which time there often is regional or systemic involvement.
  • Mild, atypical chest pain associated with eating precedes dysphagia but is rarely significant enough for the patient to seek health care.
  • Pain on swallowing (odynophagia).
  • Progressive weight loss.
  • Hoarseness (if laryngeal involvement).
  • Lymphadenopathy (supraclavicular or cervical) or hepatomegaly with metastatic involvement.
  • Later symptoms—hiccups, respiratory difficulty, foul breath, regurgitation of food and saliva.
Diagnostic Evaluation
  • Chest X-ray may show adenopathy; mediastinal, widening, metastasis; or a tracheoesophageal fistula.
  • Endoscopy with cytology and biopsy.
  • Surveillance endoscopy of Barrett's esophagus is beneficial for early detection of malignant changes.
  • Barium esophagram may show polypoid, infiltrative, or ulcerative lesion requiring biopsy.
  • CT scanning may be helpful in delineating the extent of the tumor as well as in identifying presence of adjacent tissue invasion and metastases.
Management
  • The goal of treatment may be cure or palliation, depending on the staging of the tumor and the patient's overall condition in relation to nutritional, cardiovascular, pulmonary, and functional status.
  • The wide variability in treatment reflects the overall poor results from any one approach.
  • Surgery.
    • Lesions of the middle and lower esophagus are excised with use of the thoracotomy approach with esophagogastrectomy or colon interposition (section of colon is used to replace the excised portion of the esophagus).
    • Lesions of the cervical esophagus are excised with a bilateral neck dissection and esophagogastrectomy; laryngectomy and thyroidectomy may be necessary.
    • A two-step approach may be selected when resection with a cervical esophagostomy and feeding gastrostomy are performed initially; subsequent reconstructive surgery is performed.
  • Radiation, chemotherapy, or their combination; combination therapy appears to have better results.
  • Palliative treatment of dysphagia through dilation done by endoscopy or laser therapy.
  • The goal of palliative treatment is to reduce the complications of the tumor to improve quality of life. Any one or a combination of the aforementioned therapies can be used for palliative treatment.
Complications
  • Preoperatively: malnutrition, aspiration pneumonitis; hemorrhage; sepsis; tracheoesophageal fistula
  • Postoperatively: pneumonia, dumping syndrome, nutritional deficiencies, reflux esophagitis, anastomosis leakage
Nursing Assessment
  • Obtain history of symptoms, such as dysphagia, pain, cough, hoarseness.
  • Evaluate for weight loss and dietary changes.
  • Assess support system and personal coping mechanisms.
Nursing Diagnoses
  • Imbalanced Nutrition: Less Than Body Requirements, related to disease process and treatment
  • Risk for Infection related to chronic disease, invasive procedures and treatment
  • Ineffective Coping related to dealing with cancer
Nursing Interventions
Improving Nutritional and Fluid Status
  • Provide the preoperative patient with a high-protein, high-calorie diet as tolerated. Nutritional supplements may be indicated. TPN may be ordered if unable to take food or fluids orally.
  • Postoperatively, administer I.V. fluids as prescribed. Initially, the patient may require large volumes if extensive excision of lymph nodes was performed. TPN may be ordered.
  • Assess for bowel sounds; administer fluids per NG tube and liquid feedings through jejunostomy, as prescribed.
  • Encourage patient in advancing diet from liquids to soft foods.
  • Remind patient to remain in upright position for approximately 2 hours after eating to promote digestion.
  • Provide mouth care for patient comfort and hygiene.
Monitoring for Complications
  • Monitor blood pressure (BP), pulse, respiration, and temperature to note early onset of hemorrhage, infection, dysrhythmias, aspiration, or anastomosis leakage.
  • Observe drainage from incision and/or chest tube for bleeding or purulence.
  • Monitor arterial blood gas (ABG) levels, manage pain, suction, provide chest physiotherapy, and provide oxygen as indicated.
Strengthening Individual Coping
  • Encourage patient to utilize support system during treatment and recovery process.
  • Provide information about laryngectomy, gastrostomy, and other procedures related to surgery, as indicated.
    P.656

  • Provide training in relaxation techniques and diversional therapy for anxiety and pain control after surgery.
  • Refer to the American Cancer Society, http://www.acs.org, for additional information and sources of support.
Patient Education and Health Maintenance
  • Encourage the patient to avoid overeating, take small bites, chew food well; avoid chunks of meat and stringy raw vegetables and fruit.
  • Depending on type of surgery, frequent small meals may be better tolerated.
  • Encourage rest postoperatively and advancing activities as tolerated.
  • Instruct patient regarding signs and symptoms of complications to report: nausea, vomiting, elevated temperature, cough, difficulty swallowing.
Evaluation: Expected Outcomes
  • Good skin turgor; eating small, frequent meals, gained 2 lb
  • Vital signs stable, incision without drainage
  • Performing self-care with help of support people