Mixture toxicity, cumulative risk, and environmental justice in United States federal policy, 1980-2016 : Why, with much known, was little done?

Toxic chemicals - "toxicants" - have been studied and regulated as single entities, and, carcinogens aside, almost all toxicants, single or mixed and however altered, have been thought harmless in very low doses or very weak concentrations. Yet much work in recent decades has shown that toxicants can injure wildlife, laboratory animals, and humans following exposures previously expected to be harmless. Additional work has shown that toxicants can act not only individually and cumulatively but also collectively and even synergistically and that they affect disadvantaged communities inordinately - and therefore, as argued by reformers, unjustly.

Solid-Cystic Hidradenoma: A Dorsal Foot Presentation.

Solid-cystic hidradenoma is a benign cutaneous tumor with eccrine sweat gland origins that is most commonly found in the head, neck, trunk, and upper extremity regions of patients in the middle to older age groups. These lesions are generally asymptomatic, slow-growing, solitary, and nonulcerative in presentation. Degenerative malignant transformation of this tumor is very rare.

Were our critics right about the Stasi?

Background: Disinformation, now best known generically as "fake news," is an old and protean weapon. Prominent in the 1980s was AIDS disinformation, including the HIV-from-Fort-Detrick myth, for whose propagation some figures ultimately admitted blame while others shamelessly claimed credit. In 2013 we reported a comprehensive analysis of this myth, finding leading roles for the Soviet Union's state security service, the KGB, and for biologist and independent conspiracy theorist Jakob Segal but not for East Germany's state security service, the Stasi.