Keywords
Lung carcinoma; Pancoast Tumor; Superior vena caval syndrome; Thoracic outlet syndrome
Abstract
We report a case of Pancoast tumor with Superior vena cava obstruction and thoracic outlet syndrome in 60 year old patient who has been diagnosed to have undifferentiated lung carcinoma on evaluation. Patient was a chronic smoker from 40 years on treatment for chronic obstructive pulmonary disease and presented with hoarseness of voice, puffiness of face, pain in right arm and chest.
Chest radiography and computerized tomography of thorax showed homogenous density in right upper lobe extending in to superior mediastinum with involvement of multiple groups of lymphnodes. CT guided biopsy confirmed diagnosis of undifferentiated large cell carcinoma. Patient developed clinical features of superior vena caval obstruction in a period of 15 days.
Introduction
Lung cancer is the fifth common cancer in India with 63,000 new cases detected per year [1]. Predominantly occurrence is noted in men and smokers [2]. Undifferentiated lung carcinoma constitutes about 5-10% of lung cancers [3]. Pancoast tumor is characterized by a malignant neoplasm of superior sulcus of the lung with destructive lesions of thoracic outlet and involvement of brachial plexus and cervical sympathetic nerves [4]. Superior Vena Cava Syndrome (SVCS) is characterized by gradual, insidious compression/obstruction of the superior vena cava [5].
Case History
A 60 year old male patient, labourer by occupation presented with pain in right shoulder from a period of 1 month. Patient described pain as severe grade 10/10 radiating from shoulders to fingers associated with tingling, numbness and heaviness of arm. Patient complains of hoarseness of voice and puffiness of face and neck from 15 days. Diurnal variation of puffiness was present. Patient consulted general physician and took treatment but, it did not relieve his pain. He was on medications tramadol and gabapentin. Past medical history is significant for tobacco usage (smoking and chewing) since 40 years.
On physical examination patient had severe pain on holding his right hand. Edema of hand, face and neck was observed. Patient had engorged veins over upper chest. (Figure 1) Patient could not make a fist with right hand. Eye examination was normal except for ptosis in right eye. Power is reduced in right trapezius muscle, shoulder, elbow and wrist. Muscle tone is difficult to assess due to pain. Sensory level was at T4 for pinprick. Pemberton’s sign was positive.
Figure 1: Superficial veins engorgement over chest.
Figure 2: Chest Radiography showing Right upper zone opacity and fibrosis.
Figure 3: Computerized tomography of chest showing right upper lobe mass.
Reflexes are present. Patient had 4 enlarged lymphnodes in right axilla and neck, 2×1 cm in size, firm in consistency, mobile, borders well made out, smooth surfaced. Laboratory tests were normal. Chest radiography showed parenchymal opacity in right apex. (Figure 2) Computerized tomography of thorax showed soft tissue mass in right upper lobe extending in to superior mediastinum with involvement of multiple groups of lymphnodes. (Figures 3,4,5 and 6) Computerized tomography guided biopsy showed undifferentiated large cell carcinoma. (Figures 7,8 and 9) Immunohistochemistry was positive for CD45 and S100. Patient was referred to oncology center
Figure 4: Computerized tomography of chest showing right upper lobe mass.
Figure 5: Computerized tomography of chest showing right upper lobe mass extending in to mediastinum.
Figure 6: Fine needle aspiration cytology showing undifferentiated lung carcinoma.
Discussion
Superior vena cava syndrome was first described by William hunter in 1757 in a patient with aortic aneurysm caused by syphilis. Henry pancoast described pancoast tumor cases in 1924 and 1932. The tumor can cause compression of nearby vital structures causing a constellation of symptoms such as pancoast syndrome (includes horner’s syndrome) and superior vena cava syndrome [5]. Lung cancer, particularly adenocarcinoma, is the cause in 70% of patients with SVCS [6-8]. However, as many as 40% of cases are due to non-malignant causes [9]. Pancoast tumors are fewer than 5% of lung cancers (1-3% in various previous series) [10-12]. Superior vena cava syndrome is found in 5-10% of lung cancers [13]. In our case patient developed features of pancoast tumor, superior vena cava obstruction and thoracic outlet syndrome which are rare. The duration of symptoms in our patient is only 15 days. Biopsy showed undifferentiated large cell carcinoma which accounts for less than 5% of lung cancers. Patients with untreated malignancy causing superior vena cava obstruction survive only about 30 days. Even with treatment 90% of patients die within two and half years. 5 year survival rates of Pancoast tumor range from 15 to 56% [14-16]. In conclusion, patient presenting with facial puffiness and pain in the shoulder should be evaluated for the possibility of all causes of superior vena caval obstruction. Pancoast tumor should be ruled out as survival reduces with delayed treatment.
Figure 7: Fine needle aspiration cytology showing undifferentiated lung carcinoma.
References
5. National Cancer Institute. Cardiopulmonary syndromes. 2005
6. Flounders J. Superior vena cava syndrome. Oncol Nurs Forum. 2003; 30: E84-E88.
14. Detterbeck FC. Pancoast (superior sulcus) tumors. Ann Thorac Surg. 1997; 63: 1810-1818.
Citation
Sudulagunta SR, Kothandapani SK and Sodalagunta MB. Superior Venacaval Obstruction in Lung Carcinoma. SM J Pulm Med. 2015; 1(2): 1006.