ABLATION

PULMONARY

Introduction

Last updated: nov 16, 2024

Currently, there are two primary indications for local treatments in metastatic disease. The most widely accepted approach is to treat the entire metastatic burden with curative intent. However, with the advent of new therapeutic options—such as targeted therapies, immunotherapies, and antiangiogenics—there is increasing potential to treat metastases that show a dissociated or disproportionate response to systemic therapies, with the goal of preserving future treatment options. The prognosis for metastatic patients is closely linked to the nature of the primary tumor. For instance, germ cell tumors generally have a better prognosis than epithelial carcinomas, which in turn are more favorable than sarcomas or melanomas. While many other prognostic factors have been identified, those related to the disease’s characteristics and progression are most critical for guiding treatment decisions and patient selection.

 

Presentation

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Carotid artery

 

Anatomy

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Indications

Primary lung ca
Non-surgical non-stereotactic body radiotherapy (SBRT) candidates due to medical comorbidities

Metastases
Oligometastatic disease in size and number [generally accepted as less than 5 metastases as three or fewer sites] and amenable to local treatment

Other
Lack of effective systemic therapy
Desire to interrupt systemic therapy (i.e., for a chemotherapy “holiday”)
Presence of multiple metastases with only a subset showing progression (oligoprogression)
Central location that would require lobectomy or pneumonectomy for a small lung tumor
Exhausted surgical resection options
Exhausted radiation therapy options
Expected higher morbidity or worse local control with surgery or SBRT
Patient preference.

Local recurrence
Percutaneous thermal ablation is an excellent treatment option for local recurrence
Cryoablation is highly effective for treating chest wall and pleural tumors with minimal morbidity and has been shown to reduce pain within hours

  • NSCLC

    Percutaneous IGTA in the Management of NSCLC - Current Guidelines [colspan="2"]

    [null]

    SIR 2021

    Stage 1A

    Safe and effective treatment with minimal complications and survival outcomes comparable to SBRT and sublobar resection

    Recurrent

    Safe and effective treatment option

    NCCN 2020

    Stage IA

    Option for selected patients with peripheral tumors categorized as T1abcN0 disease

    T1–T3N0

    Option for selected patients

    Multiple

    Option for asymptomatic solitary metachronous tumor

    Locoregional recurrence

    Option for selected patients, including those with disease progression on EGFR or ALK therapy

    CIRSE 2020

    Stage I

    Option for patients with contraindications to surgery and curative-intent option for patients with category T1a or T1b disease

    Other stages

    Option for patients with contraindications to surgery or SBRT

    ESMO 2017

    Stage I

    Option for patients with contraindications to surgery or SBRT

    ACCP, STS 2012, 2013

    Stage I

    Option for patients with peripheral tumor measuring < 3 cm
  • METASTASES

    Percutaneous IGTA of Pulmonary Metastases - Current Guidelines[colspan="2"]

    [null]

    NCCN 2021, 2022

    Osteosarcoma

    Thermal ablation if pulmonary metastasectomy is not possible

    Colon

    Ablative techniques may be considered alone or in conjunction with resection for resectable disease
    All original sites of disease must be amenable to ablation or resection

    Head and Neck

    Ablation therapy may be used for oligometastatic disease

    RCC

    Metastasectomy, SBRT, or ablative technique for oligometastatic disease

    Adrenal cortical carcinoma

    Consider SBRT or ablative therapies

    Rectal cancer

    Resectable synchronous lung-only metastases: staged synchronous resection and/or local therapy to include thermal ablation
    Unresectable synchronous lung-only metastases: immediate or delayed staged or synchronous resection and/or local therapy (to include ablation) for metastases
    Resectable metachronous metastases: if no previous chemotherapy, then neoadjuvant chemotherapy followed by resection and/or local therapy (to include ablation); if previous chemotherapy, then neoadjuvant chemotherapy followed by resection and/or local therapy (to include ablation)

    Sarcoma of extremity, body wall, head, or neck

    Single-organ metastasis and limited tumor bulk that are amenable to local therapy: options for radical-intent treatment include ablation
    Disseminated metastases: palliative options include ablation

    Thyroid cancer

    Radioactive iodine and local therapies (including ablation) when available
    Metastatic disease not amenable to radioactive iodine therapy: consider resection of distant metastases and/or EBRT or other local therapies (to include ablation)

    ESMO 2014, 2019, 2021

    Colon cancer

    In lung-only disease or oligometastatic disease of lung, thermal ablation may be considered if resection is limited by comorbidity, the extent of lung parenchymal resection, or other factors

    Thyroid cancer

    RFA is a possibility for solitary lung lesions or those causing a specific symptom due to their volume and location

    Chondrosarcoma

    Consider surgery, RT, or local ablation for oligometastatic resectable lung disease

    Osteosarcoma

    RFA or CA are alternative options in patients unfit for surgery

    ESMO 2014, 2019, 2021

    Colorectal

    IGTA of metastatic disease to the lungs may be appropriate in some patients, including those with a limited number of small (i.e., < 3 cm) lung metastases
    RFA, CA, and MWA are appropriate modalities for secondary lung tumors

    SIR 2021

    Colorectal

    Lung ablation should be restricted to treatment of oligometastatic disease with radical intent

    IGTA = image-guided thermal ablation, NCCN = National Comprehensive Cancer Network, RCC = renal cell carcinoma, SBRT = stereotactic body radiotherapy, EBRT = electron beam radiotherapy, ESMO = European Society for Medical Oncology, RFA = radiofrequency ablation, RT = radiation therapy, CA = cryoablation, SIR = Society of Interventional Radiology, MWA = microwave ablation, CIRSE = Cardiovascular and Interventional Radiological Society of Europe.[colspan="2"]

    [null]
 

Contra indications

Absolute

• Untreatable coagulation disorders
• mCRC:
• patients with an Eastern Cooperative Oncology Group performance status of 2 or more and a life expectancy of less than 1 year
• < 3 pulmonary metastases, nodules diameter <2 cm and for which “R0” treatment is feasible, absence of extra-pulmonary metastatic disease and pulmonary-free disease interval >12 months

Relative

  • mCRC: > 5 lung metastases or a metastasis with a maximum diameter > 30 mm

 

Pre procedural

 

Materials

Essentials

  • Ultrasound
  • Sterile drapes
  • 1% lidocaine

Non-Essentials

 

Positioning the patient

  • Oblique prone

 

The procedure in steps

  • Time out
  • Positioning patient
  • Sterile wash and drapes
  • Ultrasound guided punction

 

Tips and tricks

 

Complications

  • Pneumothorax 11-52%
  • Pleural effusion 6-19%
  • Hemorrhage 6-18%
  • Nerve injury overall 1.3%
  • Systemic air embolism 0.1-3.8%
  • Bronchopulmonary fistula 0.3%
  • Needle tract seeding 0.3%
  • Pulmonary aneurysm rare
  • Bleeding needing transfusions rare
  • Lung abscess rare
  • Aseptic pleuritis rare
  • Pneumonitis rare
  • Death 0.2-0.4%

 

Post-op

 

Follow-up


Month

Modality

1

CT

3

CT

6

CT or FDG PET

9

CT

12

CT or FDG PET

18

CT

24

CT

> 24

CT annually

FDG PET/CT may be performed if tumor was FDG-avid before ablation and there are no other known sites of disease. [colspan="2"]

[null]
 

Report

 

Patient folder

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Literature

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  1. J. Mark Ryan, MD, S. M. Key, Siobhan A. Dumbleton, MD, and Tony P. Smith, MD Nonlocalized Lower Gastrointestinal Bleeding: Provocative Bleeding Studies with Intraarterial tPA, Heparin, and Tolazoline J Vasc Interv Radiol 2001 Nov;12(11):1273-7

  2. Baum ST. Arteriographic diagnosis and treatment of gastrointestinal bleeding. In Baum ST, Pentecost MJ, eds. Abrams' angiography interventional radiology. 2nd ed. Philadelphia, Pa:Lippincott, Williams & Wilkins, 2006:488.

  4. Poultsides GA, Kim CJ, Orlando R 3rd, et al. Angiographic embolization for gastroduodenal hemorrhage: safety, efficacy, and predictors of outcome. Arch Surg. 2008;143:457-461.

  5. Eriksson LG, Sundbom M, Gustavsson S, Nyman R. Endoscopic marking with a metallic clip facilitates transcatheter arterial embolization in upper peptic ulcer bleeding. J Vasc Interv Radiol. 2006;17:959-964.

  6. Dixon S, Chan V, Shrivastava V et al. Is there a role for empiric gastroduodenal artery embolization in the management of patients with active upper GI hemorrhage? Cardiovasc Intervent Radiol. 2013 Aug;36(4):970-7.

  7. Shin JH. Recent update of embolization of upper gastrointestinal tract bleeding. Korean J Radiol 2012;13 Suppl 1:S31-S39.

  9. van Leerdam ME. Epidemiology of acute upper gastrointestinal bleeding. Best Pract Res Clin Gastroenterol. 2008;22(2):209-24.

  10. Sildiroglu O, Muasher J, Arslan B, Sabri SS, Saad WE, Angle JF, Matsumoto AH, Turba UC. Outcomes of patients with acute upper gastrointestinal nonvariceal hemorrhage referred to interventional radiology for potential embolotherapy. J Clin Gastroenterol. 2014;48(8):687-92.

  11. Strate LL, Gralnek IM. ACG Clinical Guideline: Management of Patients With Acute Lower Gastrointestinal Bleeding. Am J Gastroenterol. 2016 Apr;111(4):459-74.

  13. van Dam J, Brugge WR. Endoscopy of the upper gastrointestinal tract. N Engl J Med. 1999;341(23):1738-48.

  15. Lefkovitz Z, Cappell MS, Lookstein R, Mitty HA, Gerard PS. Radiologic diagnosis and treatment of gastrointestinal hemorrhage and ischemia. Med Clin North Am. 2002 Nov;86(6):1357-99.

  16. Lee EW, Laberge JM. Differential diagnosis of gastrointestinal bleeding. Tech Vasc Interv Radiol 2004; 7: 112-22

  18. Strate LL, Gralnek IM. ACG Clinical Guideline: Management of Patients With Acute Lower Gastrointestinal Bleeding. Am J Gastroenterol. 2016 Apr;111(4):459-74.

  19. Chaudhry V, Hyser MJ, Gracias VH, Gau FC. Colonoscopy: the initial test for acute lower gastrointestinal bleeding. Am Surg. 1998 Aug;64(8):723-8.

  20. Cummings CL. Value of early capsular endoscopy for severe gastrointestinal bleeding. J Natl Med Assoc. 2004;96(12):1653-6.

  21. Appleyard M, Glukhovsky A, Swain P. Wireless-capsule diagnostic endoscopy for recurrent small-bowel bleeding. N Engl J Med. 2001;344(3):232-3.

  24. Lim JK, Ahmed A. Endoscopic approach to the treatment of gastrointestinal bleeding. Tech Vasc Interv Radiol. 2004 Sep;7(3):123-9.

  25. Nicholson AA, Ettles DF, Hartley JE, et al. Transcatheter coil embolotherapy: a safe and effective option for major colonic haemorrhage. Gut 1998; 43:79–84.

  26. Zuckier LS. Acute gastrointestinal bleeding. Semin Nucl Med. 2003 Oct;33(4):297-311.

  27. Imbembo AL, Diverticular disease of the colon. In: Sabiston D, Editor. Textbook of Surgery (14th edn). Philadelphia, PA:WB Saunders, 1992:910.

  29. Loffroy R, Rao P, Ota S, De Lin M, Kwak BK, Geschwind JF. Embolization of acute nonvariceal upper gastrointestinal hemorrhage resistant to endoscopic treatment: results and predictors of recurrent bleeding. Cardiovasc Intervent Radiol. 2010 Dec;33(6):1088-100. doi: 10.1007/s00270-010-9829-7. Epub 2010 Mar 16.

  31. Eriksson LG, Sundbom M, Gustavsson S, Nyman R. Endoscopic marking with a metallic clip facilitates transcatheter arterial embolization in upper peptic ulcer bleeding. J Vasc Interv Radiol. 2006 Jun;17(6):959-64.

  32. Anthony S, Milburn S, Uberoi R. Multi-detector CT: review of its use in acute GI haemorrhage. Clin Radiol. 2007 Oct;62(10):938-49.

  33. Ernst O, Bulois P, Saint-Drenant S, Leroy C, Paris JC, Sergent G. Helical CT in acute lower gastrointestinal bleeding. Eur Radiol. 2003;13(1):114-7

  34. Mirsadraee S, Tirukonda P, Nicholson A, Everett SM, McPherson SJ. Embolization for non-variceal upper gastrointestinal tract haemorrhage: a systematic review. Clin Radiol 2011;66:500-509.

  35. Loffroy R, Guiu B, D'Athis P, Mezzetta L, Gagnaire A, Jouve JL, Ortega-Deballon P, Cheynel N, Cercueil JP, Krausé D. Arterial embolotherapy for endoscopically unmanageable acute gastroduodenal hemorrhage: predictors of early rebleeding. Clin Gastroenterol Hepatol. 2009 May;7(5):515-23.

  36. Aina R, Oliva VL, Therasse E, et al. Arterial embolotherapy for upper gastrointestinal hemorrhage: outcome assessment. J Vasc Interv Radiol 2001;12:195-200.

  37. Mirsadraee S, Tirukonda P, Nicholson A, Everett SM, McPherson SJ. Embolization for non-variceal upper gastrointestinal tract haemorrhage: a systematic review. Clin Radiol 2011;66:500-509.

  38. Loffroy R, Guiu B, Cercueil JP, Lepage C, Latournerie M, Hillon P, Rat P, Ricolfi F, Krausé D. Refractory bleeding from gastroduodenal ulcers: arterial embolization in high-operative-risk patients. J Clin Gastroenterol. 2008 Apr;42(4):361-7.

  39. Loffroy R, Guiu B, D'Athis P, Mezzetta L, Gagnaire A, Jouve JL, Ortega-Deballon P, Cheynel N, Cercueil JP, Krausé D. Arterial embolotherapy for endoscopically unmanageable acute gastroduodenal hemorrhage: predictors of early rebleeding. Clin Gastroenterol Hepatol. 2009 May;7(5):515-23.

  40. Poultsides GA, Kim CJ, Orlando R 3rd, Peros G, Hallisey MJ, Vignati PV. Angiographic embolization for gastroduodenal hemorrhage: safety, efficacy, and predictors of outcome. Arch Surg 2008;143:457-461.

  42. Gordon RL, Ahl KL, Kerlan RK, Wilson MW, LaBerge JM, Sandhu JS, Ring EJ, Welton ML. Selective arterial embolization for the control of lower gastrointestinal bleeding. Am J Surg. 1997;174(1):24-8.

  43. Funaki B, Kostelic JK, Lorenz J, Ha TV, Yip DL, Rosenblum JD, et al. Superselective microcoil embolization of colonic hemorrhage. AJR Am J Roentgenol 2001;177:829-836 7.

  44. Bandi R, Shetty PC, Sharma RP, Burke TH, Burke MW, Kastan D. Superselective arterial embolization for the treatment of lower gastrointestinal hemorrhage. J Vasc Interv Radiol 2001;12:1399-1405.

  45. Maleux G, Roeflaer F, Heye S, Vandersmissen J, Vliegen AS, Demedts I, et al. Long-term outcome of transcatheter embolotherapy for acute lower gastrointestinal hemorrhage. Am J Gastroenterol 2009;104:2042-2046

  46. Leitman IM, Paull DE, Shires GT 3rd. Evaluation and management of massive lower gastrointestinal hemorrhage. Ann Surg 1989;209:175-180

  47. Rosenkrantz H, Bookstein JJ, Rosen RJ, Goff WB 2nd, Healy JF. Postembolic colonic infarction. Radiology 1982;142:47-51.

  48. Koh DC, Luchtefeld MA, Kim DG, Knox MF, Fedeson BC, Vanerp JS, et al. Efficacy of transarterial embolization as definitive treatment in lower gastrointestinal bleeding. Colorectal Dis 2009;11:53-59

  49. Lipof T, Sardella WV, Bartus CM, Johnson KH, Vignati PV, Cohen JL. The efficacy and durability of super-selective embolization in the treatment of lower gastrointestinal bleeding. Dis Colon Rectum 2008;51:301-305

  1. Lee EW, Laberge JM. Differential diagnosis of gastrointestinal bleeding. Tech Vasc Interv Radiol 2004; 7: 112-22

  2. Baum ST. Arteriographic diagnosis and treatment of gastrointestinal bleeding. In Baum ST, Pentecost MJ, eds. Abrams' angiography interventional radiology. 2nd ed. Philadelphia, Pa:Lippincott, Williams & Wilkins, 2006:488.

  4. Poultsides GA, Kim CJ, Orlando R 3rd, et al. Angiographic embolization for gastroduodenal hemorrhage: safety, efficacy, and predictors of outcome. Arch Surg. 2008;143:457-461.

  5. Eriksson LG, Sundbom M, Gustavsson S, Nyman R. Endoscopic marking with a metallic clip facilitates transcatheter arterial embolization in upper peptic ulcer bleeding. J Vasc Interv Radiol. 2006;17:959-964.

  6. Dixon S, Chan V, Shrivastava V et al. Is there a role for empiric gastroduodenal artery embolization in the management of patients with active upper GI hemorrhage? Cardiovasc Intervent Radiol. 2013 Aug;36(4):970-7.

  7. Shin JH. Recent update of embolization of upper gastrointestinal tract bleeding. Korean J Radiol 2012;13 Suppl 1:S31-S39.

  9. van Leerdam ME. Epidemiology of acute upper gastrointestinal bleeding. Best Pract Res Clin Gastroenterol. 2008;22(2):209-24.

  10. Sildiroglu O, Muasher J, Arslan B, Sabri SS, Saad WE, Angle JF, Matsumoto AH, Turba UC. Outcomes of patients with acute upper gastrointestinal nonvariceal hemorrhage referred to interventional radiology for potential embolotherapy. J Clin Gastroenterol. 2014;48(8):687-92.

  11. Strate LL, Gralnek IM. ACG Clinical Guideline: Management of Patients With Acute Lower Gastrointestinal Bleeding. Am J Gastroenterol. 2016 Apr;111(4):459-74.

  13. van Dam J, Brugge WR. Endoscopy of the upper gastrointestinal tract. N Engl J Med. 1999;341(23):1738-48.

  15. Lefkovitz Z, Cappell MS, Lookstein R, Mitty HA, Gerard PS. Radiologic diagnosis and treatment of gastrointestinal hemorrhage and ischemia. Med Clin North Am. 2002 Nov;86(6):1357-99.

  16. Lee EW, Laberge JM. Differential diagnosis of gastrointestinal bleeding. Tech Vasc Interv Radiol 2004; 7: 112-22

  18. Strate LL, Gralnek IM. ACG Clinical Guideline: Management of Patients With Acute Lower Gastrointestinal Bleeding. Am J Gastroenterol. 2016 Apr;111(4):459-74.

  19. Chaudhry V, Hyser MJ, Gracias VH, Gau FC. Colonoscopy: the initial test for acute lower gastrointestinal bleeding. Am Surg. 1998 Aug;64(8):723-8.

  20. Cummings CL. Value of early capsular endoscopy for severe gastrointestinal bleeding. J Natl Med Assoc. 2004;96(12):1653-6.

  21. Appleyard M, Glukhovsky A, Swain P. Wireless-capsule diagnostic endoscopy for recurrent small-bowel bleeding. N Engl J Med. 2001;344(3):232-3.

  24. Lim JK, Ahmed A. Endoscopic approach to the treatment of gastrointestinal bleeding. Tech Vasc Interv Radiol. 2004 Sep;7(3):123-9.

  25. Nicholson AA, Ettles DF, Hartley JE, et al. Transcatheter coil embolotherapy: a safe and effective option for major colonic haemorrhage. Gut 1998; 43:79–84.

  26. Zuckier LS. Acute gastrointestinal bleeding. Semin Nucl Med. 2003 Oct;33(4):297-311.

  27. Imbembo AL, Diverticular disease of the colon. In: Sabiston D, Editor. Textbook of Surgery (14th edn). Philadelphia, PA:WB Saunders, 1992:910.

  29. Loffroy R, Rao P, Ota S, De Lin M, Kwak BK, Geschwind JF. Embolization of acute nonvariceal upper gastrointestinal hemorrhage resistant to endoscopic treatment: results and predictors of recurrent bleeding. Cardiovasc Intervent Radiol. 2010 Dec;33(6):1088-100. doi: 10.1007/s00270-010-9829-7. Epub 2010 Mar 16.

  31. Eriksson LG, Sundbom M, Gustavsson S, Nyman R. Endoscopic marking with a metallic clip facilitates transcatheter arterial embolization in upper peptic ulcer bleeding. J Vasc Interv Radiol. 2006 Jun;17(6):959-64.

  32. Anthony S, Milburn S, Uberoi R. Multi-detector CT: review of its use in acute GI haemorrhage. Clin Radiol. 2007 Oct;62(10):938-49.

  33. Ernst O, Bulois P, Saint-Drenant S, Leroy C, Paris JC, Sergent G. Helical CT in acute lower gastrointestinal bleeding. Eur Radiol. 2003;13(1):114-7

  34. Mirsadraee S, Tirukonda P, Nicholson A, Everett SM, McPherson SJ. Embolization for non-variceal upper gastrointestinal tract haemorrhage: a systematic review. Clin Radiol 2011;66:500-509.

  35. Loffroy R, Guiu B, D'Athis P, Mezzetta L, Gagnaire A, Jouve JL, Ortega-Deballon P, Cheynel N, Cercueil JP, Krausé D. Arterial embolotherapy for endoscopically unmanageable acute gastroduodenal hemorrhage: predictors of early rebleeding. Clin Gastroenterol Hepatol. 2009 May;7(5):515-23.

  36. Aina R, Oliva VL, Therasse E, et al. Arterial embolotherapy for upper gastrointestinal hemorrhage: outcome assessment. J Vasc Interv Radiol 2001;12:195-200.

  37. Mirsadraee S, Tirukonda P, Nicholson A, Everett SM, McPherson SJ. Embolization for non-variceal upper gastrointestinal tract haemorrhage: a systematic review. Clin Radiol 2011;66:500-509.

  38. Loffroy R, Guiu B, Cercueil JP, Lepage C, Latournerie M, Hillon P, Rat P, Ricolfi F, Krausé D. Refractory bleeding from gastroduodenal ulcers: arterial embolization in high-operative-risk patients. J Clin Gastroenterol. 2008 Apr;42(4):361-7.

  39. Loffroy R, Guiu B, D'Athis P, Mezzetta L, Gagnaire A, Jouve JL, Ortega-Deballon P, Cheynel N, Cercueil JP, Krausé D. Arterial embolotherapy for endoscopically unmanageable acute gastroduodenal hemorrhage: predictors of early rebleeding. Clin Gastroenterol Hepatol. 2009 May;7(5):515-23.

  40. Poultsides GA, Kim CJ, Orlando R 3rd, Peros G, Hallisey MJ, Vignati PV. Angiographic embolization for gastroduodenal hemorrhage: safety, efficacy, and predictors of outcome. Arch Surg 2008;143:457-461.

  42. Gordon RL, Ahl KL, Kerlan RK, Wilson MW, LaBerge JM, Sandhu JS, Ring EJ, Welton ML. Selective arterial embolization for the control of lower gastrointestinal bleeding. Am J Surg. 1997;174(1):24-8.

  43. Funaki B, Kostelic JK, Lorenz J, Ha TV, Yip DL, Rosenblum JD, et al. Superselective microcoil embolization of colonic hemorrhage. AJR Am J Roentgenol 2001;177:829-836 7.

  44. Bandi R, Shetty PC, Sharma RP, Burke TH, Burke MW, Kastan D. Superselective arterial embolization for the treatment of lower gastrointestinal hemorrhage. J Vasc Interv Radiol 2001;12:1399-1405.

  45. Maleux G, Roeflaer F, Heye S, Vandersmissen J, Vliegen AS, Demedts I, et al. Long-term outcome of transcatheter embolotherapy for acute lower gastrointestinal hemorrhage. Am J Gastroenterol 2009;104:2042-2046

  46. Leitman IM, Paull DE, Shires GT 3rd. Evaluation and management of massive lower gastrointestinal hemorrhage. Ann Surg 1989;209:175-180

  47. Rosenkrantz H, Bookstein JJ, Rosen RJ, Goff WB 2nd, Healy JF. Postembolic colonic infarction. Radiology 1982;142:47-51.

  48. Koh DC, Luchtefeld MA, Kim DG, Knox MF, Fedeson BC, Vanerp JS, et al. Efficacy of transarterial embolization as definitive treatment in lower gastrointestinal bleeding. Colorectal Dis 2009;11:53-59

  49. Lipof T, Sardella WV, Bartus CM, Johnson KH, Vignati PV, Cohen JL. The efficacy and durability of super-selective embolization in the treatment of lower gastrointestinal bleeding. Dis Colon Rectum 2008;51:301-305

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The information contained herein has been obtained from sources believed to be reliable. However, no warranty as to the accuracy, completeness or adequacy of such information is implied. No liability is accepted for errors, omissions or inadequacies in the information contained herein or for interpretations thereof. The reader assumes sole responsibility for the selection of these materials to achieve its intended results. The opinions expressed herein are subject to change without notice.

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