STUDY OF FIBREOPTIC BRONCHOSCOPY IN ENDOSCOPICALLY VISIBLE BRONCHIAL CARCINOMA.    [Original Research]
SK Verma, MD1,  AN Srivastava, MD2,  R Prasad, MD3 ,  
1. Professor, Department of Pulmonary Medicine
2. Ex-Professor, Department of Pathology
3. Professor & Head, Department of Pulmonary Medicine
Chatrapati Shahuji Maharaj Medical University, Lucknow, India

[emedpub – International Infectious Diseases :   Vol 1:7]                  [Date of Publication: 05.12.2011]
ISSN 2231-6019

May 13, 2011 at 8:22 AM

Abstract

Flexible fibreoptic bronchoscopy was performed in 60 proved patients with lung cancer. Tumors were endoscopically visible in 38 (63.3%) of patients. Of the endoscopically visible tumors, the primary sites of involvement were: main bronchus in 21 (55.3%), lobar bronchus in 14 (36.8%), and segmental bronchus in 3 (7.9%) of patients. Histopathological examination of bronchial biopsies yielded positive diagnosis in 31 (81.6%) of patients, and a combination of bronchial biopsy, bronchial aspirate cytology and postbronchoscopic sputum smear examination yielded diagnosis in 35 (92.1%) of patients with lung cancer. Squamous cell and small cell carcinoma were the common central tumors found in 60% and 28.5%, respectively. Flexible fiber optic bronchoscopy is a valuable technique for the diagnosis of endoscopically visible bronchial carcinoma.

Introduction:

For good clinical care, it is important to determine the presence or extent of endobronchial involvement of patients with known or suspected lung cancer. Bronchoscopy is accepted as the best technique for such an evaluation. In India, the diagnosis of lung cancer is delayed in most of the cases due to the lack of awareness of the disease among the population and the scarcity of diagnostic facilities at most of the hospitals. As a result, the patients present at the hospitals at an advanced stage of the disease. Fibreoptic bronchoscopy is a valuable tool for early detection of lung cancers. Hence, the present study was an attempt to validate the role of flexible fibreoptic bronchoscopy in establishing diagnosis of endoscopically visible tumors.

Patients and Methods:

A total of 60 cases were selected for the study at Chatrapati Sahuji Medical University Hospital, Lucknow, India between January and December 2004. These cases were proved to have malignant pathology either by flexible fiber optic bronchoscopy (FOB) and/or by other investigations such as fine needle aspiration cytology/CT guided biopsy of mass, plural biopsy, lymph node biopsy or by biopsy of resected lung specimens. FOB was done through trasnasal route under topical anesthesia using Olympus BF- 10 Model Fibrescope with OES Halogen light source-Olympus CLE-10 in all the 60 cases.

Forcep biopsy of endoscopically visible tumors was taken and the biopsy specimens were sent for histopathological examination. If biopsy report was negative then the biopsy was repeated. Bronchial aspirate was collected in a trap placed between the suction channel of bronchoscope and the suction machine. The patient was asked to collect the sputum in a spittoon for 24 hours after the bronchoscopic procedure. Both bronchial aspirate and postbronchoscopic sputum specimens were examined for presence of malignant cells.

Results:

Of 60 cases of lung tumors, 38 (63.3%) had endoscopically visible tumors. Cough and haemoptysis were most common symptoms reported in 35 (92.1%) and 29 (76.3%) of cases, respectively (table 1). Mass lesion was the commonest chest x-ray finding in 23 (60.5%) of cases (table 2). Out of the 38 visible tumors, the tumors mainly involved main stem bronchus in 21 (55.3%), lobar bronchus in 14 (36.8%) and segmental bronchus in 3 (7.9%) of cases. The distribution of tumors was equal on both right and left side i.e. 19 each. The endoscopic appearance of the visible lesions was: tumor in 28 (73.7%), ulcer in 5 (13.2%), marked oedema with necrosis in 4 (10.5%), and localized hyperemia in 1 (2.6%) of cases.

Table 1: Symptoms of patients with endoscopically visible tumors (n=38)

Symptoms

No. cases

Percent

Cough 35 92.1
Haemoptysis

29

76.3

Dyspnoea

11

28.9

Neck Lymphadenpathy

10

26.3

Hoarseness of voice

6

15. 8

Chest pain

3

7. 9

SVC Syndrome

2

5.3

Table 2: Radiological findings in endoscopically visible tumors (n=38).

Radiological findings

No. Of cases

Percent

Mass Lesions

23

60.5

Collapse of segment/lobe(s)

8

21.0

Non/slow resolving pneumonia

4

10.5

Pleural effusion

4

10.5

Cavitations

4

10.5

Elevation of dome of Hemi diaphragm

4

10.5

Normal chest- X-ray

1

2.6

Histopathological examination of bronchial biopsies yielded positive diagnosis in 31 (81.6%) of cases having endoscopically visible tumors. The bronchial aspirate cytology and postbronchoscopic sputum specimens were positive in 10 (26.3%) and 7 (18.4%) of cases, respectively. A combination of forcep biopsy, bronchial aspirate and postbronchoscopic sputum specimens yielded a positive diagnosis in 35 (92.1%) of cases having endoscopically visible tumors. Final diagnosis established by all the three procedures combined revealed that Squamous cell carcinoma and small cell carcinoma were common tumors found in 60% and 28.6% of cases, respectively (table 3).

Table 3: Final diagnosis established in endoscopically visible tumors (n=38)

Final diagnosis established by histopathology

Cases diagnosed by FOB

No. of cases

Percent

Squamous Cell Carcinoma

21

60.00

Small Cell Carcinoma

10

28.57

Adeno Carcinoma

2

5.71

Large Cell Carcinoma

1

2.86

Carcinoma in Situ

1

2.86

Discussion:

In this study of 38 cases of endoscopically visible tumors, the tumors were located both in right and left side of the lung in equal number (19 each). On visual observation, tumor growth occupying whole or part of bronchial lumen was the commonest finding (73.7%). The main stem bronchus involvement was observed in 21 (55.3%) and labor bronchus in 14 (36.8%) of cases. Similar high occurrence of tumors in the main stem bronchi (57.1%) was reported in an earlier study elsewhere (1). These findings of fibreoptic bronchoscopy also suggest that most of the patients of lung tumors in the population seek care quite late in the process. This is probably due to the fact that, in contrast to western countries, any shadow seen in the chest x-ray in India is regarded initially as tuberculosis and antitubercular drugs are prescribed as a routine (2). This leads to an avoidable delay in the diagnosis of cancers and many tumors become untreatable.

Among 38 bronchoscopically visible tumors, forceps biopsy, bronchial aspirate cytology and postbronchoscopic sputum cytology yielded positive diagnosis in 31 (81.6%), 10 (26.3%) and 7 (18.4%), respectively. The results of forceps biopsy in our series are comparable with 83% (3) and 85.7% (1) in other studies, but lower than those reported at 97% (4) and 98% (5). Such lower results using the forcep biopsy could be due to necrosis and sloughing around the intra bronchial tumors and the biopsy specimens from the periphery is many a time reported as inconclusive. The comparative low yield using the forcep biopsy may also be due to bleeding from endobronchial lesions as soon as biopsy forcep was touched, obscuring the visibility of tumors. An earlier study emphasized a major drawback of the fibreoptic bronchoscope i.e. small and shallow samples of tissues obtained with the small biopsy forceps used in this procedure (6).

The results of bronchial aspirate cytology were similar to those reported in an earlier study (7).  Combination of all three specimens in this study yielded a positive diagnosis in 92.1% of cases; similar results were reported in other studies (5,7,8). In this study, one case of  carcinoma in situ was found who had the complaints of haemoptysis, a normal chest –x-ray, and a localized hyperemic area in right main stem bronchus on FOB. The forceps biopsy in this case clinched the diagnosis; although all other investigations were negative.  The diagnosis of this case otherwise would have been either missed if bronchoscopy was not done; or the patient would have presented late with an advanced stage of malignancy. Thus, fibreoptic bronchoscopy has an important role when chest x-ray is normal. When risk factor such as smoking is present, bronchoscopic examination should be performed in a patient over the age of 40, presenting with haemoptysis and a normal chest x-ray (9

References:

  1. Kulpati DDS, Kumar V, Hira HS. Role of flexible fibreoptic bronchoscopy in  bronchogenic carcinoma. Ind J Chest Dis & All Sci 1985, 27: 207.
  2. Basu AK. Carcinoma of lung. Ind J Chest Dis & All Sci 1962, 4: 86.
  3. Funahashi A, Browne TK, Houser WC, Hranicka LJ. Diagnostic value of bronchial aspirate and postbronchoscopic sputum in fibreoptic bronchoscopy. Chest 1979, 76: 51
  4. Zavala DC. Diagnostic fibreoptic bronchoscopy, techniques and results of biopsy in 600 patients. Chest 1975, 68: 12.
  5. Martini M, Mccorrnick PM. Assessment of endoscopically visible bronchial carcinomas. Chest 1978, 73: 716.
  6. Stringfield JT III, Markowitz DJ. The effect of tumors size and location on diagnosis by fibreoptic bronchoscopy. Chest 1997, 72: 474.
  7. Buccheri G, Barberis P,  Delfino MS. Diagnostic morphologic and histopathologic correlate in bronchogenic carcinoma. Chest 1991, 99: 809.
  8. Kavale PA, Bode FR, Kini S. Diagnostic accuracy of lung Cancer. Chest 1976, 69: 752.
  9. Jackson CV, Savage PJ, Quin DL. Role of fibreoptic bronchoscopy in patients with haemoptysis and a normal roentgenogram. Chest 1985, 87: 143.
Both comments and pings are currently closed.

Subscribe to Newsletter

Loading...Loading...


<