This cross-sectional study has shown that athletes, especially those engaged in high-impact sports, have significantly higher total BMD and AMM than controls. These results suggest that the type of sport activity may be an important factor in achieving a high peak bone mass and reducing osteoporosis risk.

Background: Although epidemic, novel coronavirus (SARS-CoV-2) infection rarely affects pediatric population. However, in the last months an increasing number of Italian pediatricians has reported the occurrence of erythema pernio-like in children following a flu-like syndrome, after the outbreak of SARS-CoV-2 infection. Objective: To report cutaneous manifestation of SARS-CoV-2 infection in 4 adolescents. Methods: : Observational study reporting 4 adolescents with skin lesions, 2 weeks after the occurrence of a flu-like syndrome. Results: Fourteen days after a flu-like syndrome, adolescents exhibited skin lesions to toes and feet. These lesions were rounded, with blurred limits, with a 5-15 mm diameter, red-violaceous-bluish colored, sometimes resulting in bullous lesions in correspondence of the central or apical portion, which tended to be covered with blackish crusts after evolution. Lesions were also accompanied by pain of variable intensity and evolved within two or three weeks to self-resolution without particular sequelae. In two patients, pharyngeal and nasal swabs were negative for SARS-CoV-2 infection, at the presentation of skin lesions. After 2 months from clinical manifestations, patients were tested positive for SARS-CoV-2 antibodies. Conclusions: In pediatric and adolescent population, the occurrence of an erythema pernio-like after a flu-like syndrome could be associated to SARS-CoV-2 infection.

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The objective of the present report was to develop mathematical prediction formulae for the lumbar spine, pelvis and total bone mineral density (BMD) based on the osteoporosis risk factors age and BMI in healthy and cirrhotic postmenopausal women. The study population comprised 20 postmenopausal cirrhotic women (late PM cirrhotic women), 20 postmenopausal healthy women matched for age and BMI (late PM healthy women), and 19 younger postmenopausal healthy women matched for BMI (early PM healthy women). Segmental and total bone mineral content and BMD, total bone-free lean body mass and total fat mass were measured for all women using dual X-ray absorptiometry (DXA). The prediction formulae for late PM cirrhotic women had higher cumulative correlation coefficients ( r=0.71, p=0.05 for spine BMD, r=0.84, p=0.013 for pelvis BMD, and r=0.89, p=0.004 for total BMD) than those for early PM healthy women ( r=0.64, p=0.015 for spine BMD, r=0.69, p=0.002 for pelvis BMD, and r=0.62, p=0.022 for total BMD) and late PM healthy women ( r=0.29, p=NS for spine BMD, r=0.39, p=NS for pelvis BMD, and r=0.54, p=NS for total BMD). The mathematical formulae based on the variables age and BMI were capable of predicting lumbar spine BMD, pelvis BMD, and total BMD by DXA for the three groups of postmenopausal women.