The article systematizes information about various dermatological signs of a novel coronavirus infection – COVID-19. Special attention is paid to the phenomenon of COVID-19-associated angiitis. A clinical case of acroischemia associated with COVID-19 is described: on the 34th day after the onset of infection, a patient developed skin cyanosis of the distal parts of the fingers, which resolved spontaneously after a few days. The need for further research on the skin manifestations of COVID-19 and the development of an effective strategy for managing patients, as well as monitoring the condition of convalescents, is emphasized.

For a long time, the only method of diagnosing osteoporosis (OP) was radiographic examination. The radiological signs of OP are well known. Conclusions about normal or increased bone transparency can be made on the basis of 5 images of the axial skeleton (thoracic, lumbar spine in two projections, pelvic bones with both femoral trochanters, skull in lateral projection, hands in direct projection). But it is possible to make a reliable diagnosis of OP with the help of radiographic examination of any localization only after the loss of 20-40%, and according to some data - up to 50% of the bone mass. The reason for diagnostic difficulties is the variability of doctor's assessment of radiographs, soft tissue thickness and stacking, peculiarities of manifestation, quality and sensitivity of the film, exposure, etc.

No abstract