Flashcards in 14 Lung Cancer Lee Deck (49)
What are some Genetic Changes that increase the risk of lung cancer?
Mutation tumor suppressor (p53). BCL-2, EGFR overexpression. K-RAS gene mutation. ALK (anaplastic lymphoma kinase) mutation
What is prevention and early detection like for lung cancer?
Low-dose CT scan-based screening (detected LC at earlier stages, recommended in high-risk (age > 55, former smokers). No established chemoprevention agents yet. NO tumor marker to detect lung CA at early stages
What is Small Cell Lung Cancer (SCLC)?
Oat cell, strongly linking to SMOKING. Most aggressive natural course. Only 14% of lung cancers
What is Non-Small Cell Lung Cancer (NSCLC)?
Adenocarcinoma (incidence rising, most common in non-smokers). Squamous cell (clearly related to smoking). Large cell
What are the characteristics of SCLC?
Rapid doubling time. High rate of metastases. Treatment: highly sensitive to radiation and chemotherapy. High rate of paraneoplastic syndrome (PNS)
What are the characteristics of NSCLC?
Relatively slow growing. Low rate of metastases. Treatment: surgery in Stage I and II; less sensitive to chemotherapy than SCLC. Low rate of PNS
What is Paraneoplastic Syndrome?
Due to tumor secretion of hormone like substances): Weight loss, Cushing's syndrome (ACTH), Anemia, Hyponatremia (SIADH), Hypercalcemia (PTH), Clubbing
What are the SCLC stages?
Limited disease. Extensive disease
What is Limited disease SCLC?
Tumor confined to hemithorax of origin and/or the mediastinum and supraclavicular nodes. Fits in a radiation field
What is Extensive disease SCLC?
Tumor not confined to hemithorax of origin. Distant metastasis
What are the treatment options for SCLC?
Single or combo modality. Surgery rarely, only in very early stage (if confined to chest w/o nodal invasion). Radiation: very radiosensitive
What is radiation therapy like in SCLC?
Goal = cure in limited disease (concurrent chemotx + radiation). Palliative role in extensive disease (bone pain, symptomatic brain mets, SVC syndrome). PCI (prophylactic cranial irradiation): Eradication of occult, microscopic brain metastasis
What are the combination chemotx choices for SCLC (all stages)?
EP (Etoposide, Cisplatin). EP + Radiation in limited disease. EC (Etoposide + Carboplatin). Cisplatin + Irinotecan
What are the complications of treatment with RT + CT (Etoposide/Cisplatin)?
Mucositis, Esophagitis, Esophageal stricture. Myelosuppression. Skin reactions. N/V, wight loss. Renal dysfunction
What is second line or salvage therapy for SCLC?
Most SCLC will relapse: median survival = only 4-5 months when treated w/ further chemotherapy. Second line chemotx provides palliation
What are the agents used in second line or salvage therapy for SCLC?
Docetaxel. Gemcitabine. Ifosfamide. Irinotecan. Paclitaxel. Topotecan. Temozolamide (if w/ brain mets). Vinorelbine
What is the prognosis and treatment tightly linked to for NSCLC?
Stage and well as patient factors (PS, histology, biomarker, gender, weight loss)
What is Stage I NSCLC?
Tumor of any size, located to lung, no lymph nodes
What is Stage II NSCLC?
Same as stage I, but WITH lymph node involvement
What is Stage IIIa NSCLC?
Tumor in chest wall, main bronchus or mediastinum
What is Stage IIIb NSCLC?
Tumor extending into mediastinal structure
Which stages of NSCLC are unresectable and have the lowest survival?
Stage IIIb, Stage IV
What are the treatment options for Resectable Stages of NSCLC (I, II, IIIa)?
Surgery is tx of choice w/ curative intent. Radiation (Stage I and II): treatment for medically inoperable, positive margins after surgery). Chemotherapy: adjuvant cisplatin-based (II, IIIa)
What is the treatment option for Stage IIIa (N2) - locally advanced, resectable NSCLC?
Standard: combined modality (3). Surgery --> adjuvant CT +/- RT. OR. Induction chemoradiation --> surgery
What is the treatment option for UNresectable Stage IIIa/IIIb NSCLC?
Associated w/ high rate of occult metastases; systemic relapse ~70%. Combined chemoradiation - concurrent better than sequential
What is treatment like for Advanced or Metastatic disease NSCLC?
Systemic chemotx: NSCLC only moderately sensitive. Benefit: good PS (performance status: 0-2), >70% Karnofsky, <10% weight loss. PS 3-4: no benefit from tx. Chemotx alone as palliation for Stage IIIb, IV
What type of NSCLC requires mutation testing?
Adenocarcinoma or Large cell. Not routinely recommended for Squamous NSCLC
What treatment options are there for a patient if EGFR or ALK negative?
What treatment options are there for a patient if EGFR positive?