Pathology of carcinoma of the lung. Changing patterns.
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Biomedical subjects
Publications and source records attributed to R Yesner.
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Six-hundred-twenty cases of small-cell carcinoma of the lung entered into the Veterans Administration Lung Group protocols 9-15 were retrospectively subdivided into histologic subtype, as proposed by the WHO (1977). Medium survival was greater for subtype No. 21 (lymphocyte-like) than for subtype No. 22 (intermediate) (17.2 vs. 12.6 weeks; P = .005). Patients with extensive disease survived longer with subtype No. 21 than subtype No. 22 (14.5 vs. 10.9 weeks; P = .026). However, no median survival difference was seen with limited disease. Survival for subtype 21 was greater than No. 22 (P = .016) for patients with poor initial performance status (IPS; Karnofsky 70 or less); for ambulatory patients (IPS 80-100) a survival advantage was seen for subtype No. 21 compared with No. 22, but did not quite reach statistical significance (P = .09). Survival in subtype No. 21 was better than in subtype No. 22 (24.3 vs. 14.7 weeks; P = .001) when no weight loss (less than 10 pounds over the six-month period prior to therapy) was documented. However, with weight loss (greater than 10 pounds) survival in each subtype was similar.
The Veterans Administration Lung Group conducted a prospective study of irradiation for subclinical brain metastases in patients with inoperable carcinoma of the lung between 1975 and 1978. Patients were randomized to receive whole-brain irradiation (2,000 rads in two weeks) or no brain treatment, and to receive one of two regimens of thoracic irradiation. Three hundred twenty-three patients with normal radionuclide brain scans were able to be evaluated. The rate of clinical brain metastasis was 26% for patients with small cell carcinoma vs 10% for the "non-small-cell" group. A statistically insignificant decrease in the rate of brain metastasis was found among irradiated patients with small cell carcinoma. The frequency of brain metastasis in the non-small-cell patients was reduced from 13% to 6% by irradiation. Prophylactic cranial irradiation can decrease morbidity from non-small-cell carcinoma of the lung.
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We describe 19 cases of pulmonary disease due to Mycobacterium xenopi, a nosocomial infection related to the hospital water system. Pre-existing lung disease and prolonged environmental exposure during previous hospitalizations were apparent predisposing factors. Twelve patients had respiratory symptoms, including three with hemoptysis, at the time an abnormal chest roentgenogram was obtained. The predominant radiographic presentation of lung diseases caused by M. xenopi was a nodular or mass shadow, but cavitary disease and multiple nodular densities were also frequently observed. One subject had a solitary pulmonary nodule, and surgical resection was performed. In 12 patients who were skin tested with both M. xenopi sensitin and PPD-tuberculin, induration was consistently greater with M. xenopi. Initial isolates of M. xenopi were uniformly sensitive in vitro to 2.0 microgram of streptomycin, 1.0 microgram of isoniazid, and 10.0 microgram of para-aminosalicylic acid. In general, disease due to M. xenopi was successfully treated with standard antituberculosis drugs.
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Patterns of failure after treatment for carcinoma of the lung were analyzed by the major WHO cell types. Only diagnoses of the review panel of the Veterans Administration Lung Group were used. First sites of progression were analyzed for 185 patients in a clinical trial, and cause of death was evaluated in 300 consecutive autopsies from VALG studies. Clinical progression was similar for all cell types--20% failed locally and 30% developed metastases. Carcinomatosis or brain metastasis caused death in only 27% of patients with squamous, in over half with large cell and adenocarcinoma, and in 70% of patients with small cell carcinoma. Complications of the local tumor (infection, hemorrhage, and respiratory failure) caused death in 50% of patients with squamous, in 1/3 with large cell and adenocacrinoma, and in 21% of those with small cell carcinoma. These clinical and autopsy data suggest the need for aggressive treatment of the local tumor in all cell types, and systemic therapy for small cell carcinoma. Both local and systemic approaches are needed for large cell and adenocarcinoma.
A patient with abdominal pain, weight loss, and a gastric mass was found to have a pleomorphic infiltrate of lymphocytes and plasma cells. Analysis of serum proteins revealed gamma heavy chains, which were detected in the urine as well. This case is unusual because of the extralymphatic involvement and the possibly unique character of the heavy chain, an insertion in added polypeptides.
The pulmonary histopathologic features in a sporadic case of Legionnaires' disease are shown. The changes include acute bronchitis with focal ulceration and diffuse acute interstitial pneumonitis. These changes are not those seen with typical bacterial pneumonia but are similar to changes seen when viruses, rickettsiae, chlamydiae, or Mycoplasma pneumoniae organisms are the infecting agents.
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Radiographic examination of the facial bones frequently reveals osteolytic and osteoblastic changes. A case of undifferentiated large-cell carcinoma of the lung with metastasis to the anterior maxilla is reported. Intraoral dental radiographs revealed an ill-defined lytic area in the left anterior maxilla. The periphery of the lesion revealed saberlike extensions of bone extending into the lytic defect. Cytologic and biopsy studies of the oral mucosa led to identification of the tumor as an undifferentiated large-cell carcinoma of the lung.
Quantitative microscopy, including morphometry of tumor, stroma, and necrosis was used for the prognostication of pulmonary carcinoma. This was supplemented by the mitosis: necrobiosis ratio, reciprocal of cell count, and number of "apoptosis" bodies. Data for 15 short-term (4-19 mo) and 8 long-term (32-132 mo) survivors with epidermoid carcinoma were expressed as indexes. The morphometric index averaged 106.8 for short-term and 156.1 for long-term survivors, respectively. Addition of the other three indexes resulted in an average of 171.4 for short-term and 318.5 for long-term survivors. Morphometric index and the necrobiosis: mitosis ratio were of greater significance than the other two indexes. Discriminatory function analysis based on the weighted sum of the logarithms of the four indexes demonstrated their usefulness in classifying patients as short-term or long-term survivors. The error rate for the discriminant analysis was 3.5%.
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