USMLE Forum Archives - USMLE Step 1 - Pathology 8
Pathology 8
TheOne - 10-01-06 14:16
A 55-year-old patient presents with chronic cough. Chest x-ray demonstrates a coin lesion near the apex of the lung. CT-guided biopsy of the lesion demonstrates a malignant tumor arising in an area of scarred lung. Which of the following type of cancer is most likely to be present?
A. Adenocarcinoma
B. Bronchioloalveolar carcinoma
C. Large cell carcinoma
D. Oat cell carcinoma
E. Squamous cell carcinoma
TheOne - 10-01-06 14:16
A 55-year-old patient presents with chronic cough. Chest x-ray demonstrates a coin lesion near the apex of the lung. CT-guided biopsy of the lesion demonstrates a malignant tumor arising in an area of scarred lung. Which of the following type of cancer is most likely to be present?
A. Adenocarcinoma
B. Bronchioloalveolar carcinoma
C. Large cell carcinoma
D. Oat cell carcinoma
E. Squamous cell carcinoma
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#1
Re: Pathology 8 nrp - 10-02-06 10:34 B.Bronchoalveloar carcinoma. Usually peripheral in location. Coin shaped lesions nd occurs in previously damaged parts such as fibrosis.Characteristic papillary projections into the alveoli
#2
Re: Pathology 8
TheOne - 10-03-06 12:58 Explanation: The correct answer is A. Tumors that arise peripherally and can cause coin lesions include adenocarcinoma (choice A), bronchioloalveolar carcinoma (choice B), and large cell carcinoma (choice C). Of these, adenocarcinoma is the form specifically associated with lung scarring related to old granulomatous disease, old chronic obstructive lung disease, or other old damage to the lungs. Remember bronchioloalveolar carcinoma (choice B) as the one that is not associated with smoking. Large cell carcinoma (choice C) is an aggressive, undifferentiated form of lung cancer. Remember oat cell (small cell, choice D) carcinoma as the one that can commonly cause paraneoplastic syndromes such as SIADH and Cushing's syndrome. You should associate squamous cell carcinoma of the lung (choice E) with hypercalcemia.
#3
Re: Pathology 8 galaxy - 05-27-10 18:53 Adenocarcinoma of the lung due to a peripheral lung scar or interstitial fibrosis is also called as scar carcinoma...appears as a coin lesion..
#4
Re: Pathology 8 babbu5508 - 06-21-10 14:44 A. Adenocarcinoma of lung is also called as scar carcinoma as it arises from the ares of lung fibrosed by other diseases of lung.
#5
Re: Pathology 8 bingousmle - 06-30-10 22:43 A. Adenocarcinoma as Chest x-ray demonstrates a coin lesion near the apex of the lung. CT-guided biopsy of the lesion demonstrates a malignant tumor arising in an area of scarred lung.
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