A case of a 33-yr-old man who died following occupational exposure to pentachlorophenol is presented. Postmortem examination revealed cerebral edema and fatty degeneration of the viscera. Review of the literature indicates that the clinical syndrome of poisoning with the compound results from mitochondrial toxicity with derangement of aerobic metabolism.

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A case of multiple pulmonary scar carcinomas arising in a 53-year-old woman with Hodgkin's disease is reported. Review of the literature reveals that scar carcinoma is generally thought to arise in areas of bronchiolar epithelial proliferation occurring in association with pre-existing lung scars. However, we and others have emphasized that, given the usual gross and histologic picture of scar carcinoma, it is impossible to state with certainty whether the carcinoma arose in response to the scar tissue, or the scar tissue formed consequent to the occurrence of repeated small foci of tumor necrosis. The association of Hodgkin's disease and multiple malignancies is also discussed.

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