Endoscopy-induced complication of barotrauma with concomitant benign pneumoperitoneum.

Endoscopy is widely used for diagnostic and therapeutic purposes in modern clinical practice. Two of the less common complications are barotrauma and benign pneumoperitoneum. In isolation, these two complications have been successfully managed conservatively.

Obesity Is Associated with Attenuated Tissue Immunity in COVID-19.

Obesity affects 40% of U.S. adults, is associated with a proinflammatory state, and presents a significant risk factor for the development of severe coronavirus disease (COVID-19).

Cutaneous manifestations of phosphate solution extravasation.

Extravasation injuries are common in patients receiving multiple intravenous infusions. Although such injuries are closely associated with the infusion of cytotoxic chemotherapy, they have also been been associated with extravasation of noncytotoxic drugs. Extravasation injuries can lead to skin ulceration and nerve and tendon damage, and therefore to permanent disability.

Expanded porphyrin-like structures based on twinned triphenylenes.

Triphenylene twins are intriguing structures, and those bridged through their 3,6-positions by dipyrromethene units give a new class of macrocycles that can be viewed as rigid, expanded porphyrin derivatives in which coplanarity is enforced in a formally antiaromatic π system. Somewhat surprisingly, however, macrocyclization leads to significant overall stabilization of the dipyrromethene chromophores.