PEDIATRIC ONCOLOGY
Leukemia
- General information
- Most common form of childhood cancer
- Peak incidence is 3 to 5 years of age
- Proliferation of abnormal white blood cells that do not mature beyond the blast phase
- In the bone marrow, blast cells crowd out healthy white blood cells, red blood cells, and platelets, leading to bone marrow depression
- Blast cells also infiltrate other organs, most commonly the liver, spleen, kidneys, and lymph tissue
- Symptoms reflect bone marrow failure and associated involvement of other organs
- Types of leukemia, based on course of disease and cell morphology
- Acute lymphocytic leukemia (ALL)
- 80-85% of childhood leukemia
- malignant change in the lymphocyte or its precursors
- acute onset
- 95% chance of obtaining remission with treatment
- 75% chance of surviving 5 years or more
- prognostic indicators include: initial white blood count (less than 10,000/mm3), child's age (2-9 years), histologic type, sex
- Acute nonlymphocytic leukemia (ANLL)
- includes granulocytic and monocytic types
- 60-80% will obtain remission with treatment
- 30-40% cure rate
- prognostic indicators less clearly defined
- Medical management
- Diagnosis: blood studies, bone marrow biopsy
- Treatment stages
- Induction: intense and potentially life threatening
- CNS prophylaxis: to prevent central nervous system disease. Combination of radiation and intrathecal chemotherapy.
- Maintenance: chemotherapy for 2 to 3 years.
- Assessment findings
- Anemia (due to decreased production of RBCs), weakness, pallor, dyspnea
- Bleeding (due to decreased platelet production), petechiae, spontaneous bleeding, ecchymoses
- Infection (due to decreased WBC production), fever, malaise
- Enlarged lymph nodes
- Enlarged spleen and liver
- Abdominal pain with weight loss and anorexia
- Bone pain due to expansion of marrow
- Nursing interventions
- Provide care for the child receiving chemotherapy and radiation therapy.
- Provide support for child/family; needs will change as treatment progresses.
- Support child during painful procedures (frequent bone marrow aspirations, lumbar punctures, venipunctures needed).
- Use distraction, guided imagery.
- Allow child to retain as much control as possible.
- Administer sedation prior to procedure as ordered.
Brain Tumors
- General information
- A space-occupying mass in the brain tissue; may be benign or malignant
- Males affected more often; peak age 3-7 years
- Second most prevalent type of cancer in children
- Cause unknown; genetic and environmental factors may play a role; familial tendency for brain tumors, which are found with preexisting neurocutaneous disorders.
- Two-thirds of all pediatric brain tumors are beneath the tentorium cerebelli (in the posterior fossa), often involving the cerebellum or brain stem.
- Three-fourths of brain tumors in children are gliomas (medulloblastoma and astrocytoma).
- Types
- Medulloblastoma: highly malignant tumor usually found in cerebellum; runs a rapid course
- Findings include increased ICP plus unsteady walk, ataxia, anorexia, early morning vomiting
- Treated with radiation since complete removal is impossible
- Astrocytoma: a benign, cystic, slow-growing tumor usually found in cerebellum
- Onset of symptoms is insidious.
- Findings include focal disturbances, papilledema, optic nerve atrophy, blindness.
- Ependymoma: a usually benign tumor that arises in the ventricles of the brain, causing noncommunicating hydrocephalus and damage (by pressure) to other vital tissues of the brain
- Craniopharyngioma: tumor that arises from remnants of embryonic tissue near the pituitary gland in the sella turcica, causes pressure on the third ventricle
- Decreased secretion of ADH causes diabetes insipidus (these children may need Pitressin).
- Additional symptoms include altered growth pattern, visual difficulties, difficulty regulating body temperature.
- Brain stem glioma: slow-growing tumor, indicated by cranial nerve palsies, ataxia
- Medical management
- Surgery: some tumors entirely or partially resected; others are not amenable to surgery because of proximity to vital brain parts
- Radiation therapy: often used to shrink tumors
- Chemotherapy: vincristine, lomustine, procarbazine, intrathecal methotrexate; not as effective with brain tumors as with other childhood cancers
- Assessment findings
- Symptoms dependent on location and type of tumor.
- A definite diagnosis is difficult in children because of the elasticity of child's skull and generally poor coordination of the young child.
- A decrease in school performance may be the first sign.
- Increased ICP
- Morning headache
- Morning vomiting without nausea; vomiting without relation to feeding schedule; projectile vomiting
- Personality changes
- Diplopia
- difficult to assess in young children
- observe child for tilting of head, closing or covering one eye, rubbing the eyes, or impaired eye-hand coordination
- Papilledema: a late sign
- Increased blood pressure with decreased pulse: also a late sign
- Cranial enlargement
- more readily noticeable prior to 18 months when suture lines are still open
- bulging, tense, pulsating fontanels
- widened suture lines
- 90% or more on head circumference chart
- Focal signs and symptoms
- Ataxia
- in cerebellar tumors
- may not be readily identified because of uncoordinated movements of young children
- Muscle strength
- weakness with cerebellar tumors
- weakness, spasticity, and paralysis of lower extremities with cerebral or brain stem tumors
- change in handedness, posture, or manual coordination: may be early signs
- Head tilt
- in posterior fossa tumors
- early sign of visual impairment
- associated with nuchal rigidity
- due to traction on the dura
- Ocular signs
- nystagmus: corresponds to the same side as the infratentorial lesion
- diplopia/strabismus: from palsy of cranial nerve VI with brain stem glioma or increased ICP
- visual field deficit (child does not react to activity on periphery of vision): with craniopharyngiomas
- Seizures: with cerebral tumors
- Diagnostic tests
- Skull x-ray reveals presence and location of tumor
- CT scan (with or without contrast dye) reveals position, consistency, size of tumor, and effect on surrounding tissue
- EEG may show seizure activity
- Nursing interventions
- Obtain baseline vital signs and perform thorough neurologic assessment; monitor vital signs and neurologic status frequently.
- Prevent injury/complications.
- Institute seizure precautions.
- Monitor for fluid and electrolyte imbalance from vomiting.
- Observe for increased ICP.
- Provide safety measures (bed rails up).
- Promote comfort/relief of headache.
- Decrease environmental stimuli.
- Administer analgesics as ordered.
- Prevent constipation (straining increases ICP).
- Provide appropriate foods and fluids as ordered.
- Provide stool softeners as ordered.
- Avoid enemas, which increase ICP.
- Provide care for the child undergoing brain surgery.
- Provide care for the child undergoing radiation or chemotherapy.
- Provide client teaching and discharge planning concerning
- Diagnostic tests (instruction needs to be appropriate to the child's developmental level)
- machines will make clicking sounds
- wires attached to the head for an EEG will not electrocute child
- head is immobilized for a CT scan
- the use of contrast dye and expected sensations if used
- need to lie still with the technician out of the room for most tests (younger children will be sedated for fuller cooperation)
- Importance of family discussion of fears/ anxiety about surgery and prognosis
- Need to assist in implementing child's interaction with peers
- Available support groups and community agencies
Brain Surgery
- General information
- Indications
- Removal of a tumor
- Evacuation of a hematoma
- Removal of a foreign body or skull fragments resulting from trauma
- Aspiration of an abscess
- Insertion of a shunt
- Nursing interventions: preoperative
- Assess the child's understanding of the procedure; have the child draw a picture, tell a story; observe doll play.
- Explain the procedure in terms according to the child's developmental level.
- Allow the child to visit the operating room/intensive care unit, if permitted, depending on the child's emotional and developmental levels
- Explain that pre-op symptoms such as headache and ataxia may be temporarily aggravated.
- Advise child/parents that blindness may result, depending on the location of the tumor.
- Inform the child/parents that the head will be shaved; long hair may be saved; hats or scarves may be used to cover the head once the dressings are removed.
- Support the child/family if a tumor cannot be totally removed.
- Provide instruction about radiation and chemotherapy (may need to be delayed since detail may be overwhelming).
- Explain to the child/parents about the post-op dressing, monitoring devices, and possibility of facial edema.
- Nursing interventions: postoperative
- Prevent injury/complications.
- Monitor vital signs and neuro status frequently until stable.
- Apply hypothermia blanket as ordered.
- Assess respiratory status/signs of infection.
- Observe the dressing for discharge/hemorrhage.
- Close or cover eyes, apply ice, instill saline drops or artificial tears.
- Position as ordered according to the location of the tumor and type of surgery.
- Assess for increased ICP.
- Institute seizure precautions.
- Promote comfort.
- Decrease environmental stimuli.
- Administer analgesics as ordered, first assessing LOC.
- Promote adequate nutrition.
- Administer fluids as ordered.
- Monitor I&O.
- Provide diet as ordered.
- Provide emotional support and encourage child/family to discuss prognosis.
- Provide client teaching and discharge planning concerning
- Wound care
- Signs of increased ICP
- Activity level
- Sensation and time period of hair growth
- Peer acceptance
- Radiation/chemotherapy, if indicated
- Availability of support groups/community agencies
Hodgkin's Lymphoma
- General information
- Malignant neoplasm of lymphoid tissue, usually originating in localized group of lymph nodes; a proliferation of lymphocytes
- Metastasizes first to adjacent lymph nodes
- Cause unknown
- Most prevalent in adolescents; accounts for 5% of all malignancies
- Prognosis now greatly improved for these children; influenced by stage of disease and histologic type
- Long-term treatment effects include increased incidence of second malignancies, especially leukemia and infertility
- Medical management
- Diagnosis: extensive testing to determine stage, which dictates treatment modality
- Lymphangiogram determines involvement of all lymph nodes (reliable in 90% of clients); is helpful in determining radiation fields
- Staging via laparotomy and biopsy
- stage I: single lymph node involved; usually in neck; 90%-98% survival
- stage II: involvement of 2 or more lymph nodes on same side of diaphragm; 70%-80% survival
- stage III: involvement of nodes on both sides of diaphragm; 50% survival
- stage IV: metastasis to other organs
- Laparotomy and splenectomy
- Lymph node biopsy to identify presence of Reed-Sternberg cells and for histologic classification
- Radiation: used alone for localized disease
- Chemotherapy: used in conjunction with radiation therapy for advanced disease
- Assessment findings
- Major presenting symptom is enlarged nodes in lower cervical region; nodes are nontender, firm, and movable
- Recurrent, intermittent fever
- Night sweats
- Weight loss, malaise, lethargy
- Pruritus
- Diagnostic test: presence of Reed-Sternberg cells
- Nursing interventions
- Provide care for child receiving radiation therapy.
- Administer chemotherapy as ordered and monitor/alleviate side effects.
- Protect client from infection, especially if splenectomy performed.
- Provide support for child/parents; specific needs of adolescent client must be considered.
Non-Hodgkin's Lymphoma
- General information
- Tumor originating in lymphatic tissue
- Significantly different from Hodgkin's lymphoma
- Control of primary tumor is difficult
- Disease is diffuse, cell type undifferentiated
- Tumor disseminates early
- Includes wide range of disease entities: lymphosarcoma, reticulum cell sarcoma, Burkitt's lymphoma
- Primary sites include GI tract, ovaries, testes, bone, CNS, liver, breast, subcutaneous tissues
- Affects all age groups.
- Medical management
- Chemotherapy: multiagent regimens including cyclophosphamide (Cytoxan), vincristine, prednisone, procarbazine, doxorubicin, bleomycin
- Radiation therapy: primary treatment in localized disease
- Surgery for diagnosis and clinical staging
- Assessment findings
- Depend on anatomic site and extent of involvement
- Rapid onset and progression
- Many have advanced disease at diagnosis
- Nursing interventions: provide care for child receiving chemotherapy, radiation therapy, and surgery.
Wilm's Tumor (Nephroblastoma)
- General information
- Large, encapsulated tumor that develops in the renal parenchyma, more frequently in left kidney (usually unilateral)
- Originates during fetal life from undifferentiated embryonic tissues
- Peak age of occurrence: 1-3 years
- Prognosis good if there are no metastases.
- Medical management
- Nephrectomy, with total removal of tumor
- Postsurgical radiation in treatment of stages II, III, and IV; stage I disease does not usually require radiation, but it may be used if the tumor histology is unfavorable.
- Postsurgical chemotherapy: vincristine and daunorubicin, doxorubicin
- Assessment findings
- Staging
- Stage I: limited to kidney
- Stage II: tumor extends beyond kidney, but is completely encapsulated
- Stage III: tumor confined to abdomen
- Stage IV: tumor has metastasized to lung, liver, bone, or brain
- Stage V: bilateral renal involvement at diagnosis
- Usually mother notices mass while bathing or dressing child; nontender, usually midline near liver
- Hypertension and possible hematuria, anemia, and signs of metastasis
- Diagnostic test: IVP reveals mass
- Nursing interventions
- Do not palpate abdomen to avoid possible dissemination of cancer cells.
- Handle child carefully when bathing and giving care.
- Provide care for the client with a nephrectomy; usually performed within 24-48 hours of diagnosis.
- Provide care for the child receiving chemotherapy and radiation therapy.
Neuroblastoma
- General information
- A highly malignant tumor that develops from embryonic neural crest tissue; arises anywhere along the craniospinal axis, usually from the adrenal gland
- Incidence
- One in 10,000
- Males slightly more affected
- From infancy to age 4
- Staging
- Stage I: tumor confined to the organ of origin
- Stage II: tumor extends beyond primary site but not across midline
- Stage III: tumor extends beyond midline
- Stage IV: tumor metastasizes to skeleton (bone marrow), soft tissue (liver), and lymph nodes
- Medical management: depends on the staging of tumor and age of child; includes surgery, radiation therapy, chemotherapy
- Assessment findings vary, depending on the tumor site and stage
- If in the abdomen, may initially resemble Wilm's tumor
- Local signs and symptoms caused by pressure of the tumor on surrounding tissue
- Metastatic manifestations
- Ocular: supraorbital ecchymosis, periorbital edema, exophthalmos
- Cervical or supraclavicular lymphadenopathy
- Bone pain: may or may not occur with bone metastasis
- Nonspecific complaints; pallor, anorexia, weight loss, irritability, weakness
- Diagnosis usually made after metastasis has occurred
- Diagnostic tests
- X-rays of the head, chest, or abdomen reveal presence of primary tumor or metastases
- IVP: if tumor is adrenal, shows a downward displacement of the kidney on the affected side
- Bone marrow aspiration: to rule out metastasis; neuroblasts have a clumping pattern
- CBC: RBCs and platelets decreased
- Coagulation studies: abnormal due to thrombocytopenia
- Catecholamine excretion: VMA levels in urine increased
- child must not ingest vanilla, chocolate, bananas, or nuts for 3 days prior to the test
- 24-hour urine specimen needed
- Nursing interventions: same as for leukemia (see Pediatric Oncology - Cancers in Unit 5) and brain tumors.
Bone Tumors
Osteogenic Sarcoma
- General information
- Primary bone tumor arising from the mesenchymal cells and characterized by formation of osteoid (immature bone)
- Invades ends of long bones, most frequently distal end of femur or proximal end of tibia
- Occurs more often in boys, usually between ages 10-20 years
- Lungs most frequent site of metastasis
- 5-year survival rate is 10%-20%
- Medical management
- Surgery: treatment of choice
- Amputation: temporary prosthesis used immediately after surgery; permanent one usually fitted a few weeks later
- Limb salvage procedures
- Lung surgery if there are metastases
- Radiation: only in areas where tumor is not accessible to surgery
- Chemotherapy: adjuvant therapy being studied
- Assessment findings
- Insidious pain, increasing with activity, gradually becoming more severe
- Tender mass, warm to touch; limitation of movement
- Pathologic fractures
- Nursing interventions
- Prepare child for amputation: discuss fears, concerns, and facts of procedure; answer questions regarding prosthetic devices, limited activity
- Assure child that phantom limb pain will subside
- General information
- Primary tumor arising from cells in bone marrow
- Invades bone longitudinally, destroying bone tissue; no new bone formation
- Femur most frequently affected site
- More common in males, between ages 5-15 years
- Lungs most frequent site of metastasis
- Medical management
- High-dose radiation is primary treatment
- Chemotherapy
- Value of surgery presently being reassessed
- Assessment findings
- Pain and swelling
- Palpable mass, may be tender, warm to touch
- 15%-35% of clients have metastatic disease at time of diagnosis
- Nursing interventions
- Promote exercise of affected limb to maintain function.
- Avoid activities that may cause added stress to affected limb.
Wednesday, July 25, 2007
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