No abstract

Psoas abscess (PA) is an uncommon disease that has been increasingly reported in recent years. We reviewed patients with PA and analysed their clinical characteristics to improve the understanding of this rare disorder. The study retrospectively reviewed the clinical presentations, microbiology, and outcomes of patients with PA between 2011 and 2021 in Zhejiang Provincial People’s Hospital in China. There were 35 cases out of 23057427 hospitalised adult patients; the mean age was 60 years, and 65.7% of the patients were male. Primary symptoms were typically nonspecific. In all, 17 abscesses were considered secondary, and the most common aetiology was infective spondylitis. The most common causative organism for primary PA was Staphylococcus aureus, followed by Escherichia coli, while for secondary abscesses, there were multiple bacterial species. The overall in-hospital mortality rate was 6%. Secondary PA patients had longer hospital stays (mean, 23 vs. 28 days). PAs, as a serious infectious condition, usually present with nonspecific symptoms and laboratory test results, making early diagnosis difficult. The aetiological profiles differed from those reported in our study. Initial clinical status and subsequent imaging studies can lead to favourable outcomes.

BACKGROUND Diffuse large B-cell lymphoma (DLBCL) is a common non-Hodgkin's lymphoma. R-CHOP is a protocol for long-term chemotherapy for DLBCL patients. Long-term chemotherapy can lead to low immunity and increase the risk of opportunistic pathogen infections in immunocompromised patients. CASE SUMMARY We report a case of coinfection with Pneumocystis jirovecii ( P. jirovecii ) and Legionella pneumophila ( L. pneumophila ) in a patient with DLBCL. The patient was a 40-year-old female who was diagnosed with DLBCL and was admitted due to pulmonary infection. P. jirovecii and L. pneumophila were detected in her bronchoalveolar lavage fluid by hexamine silver staining, isothermal amplification and metagenomic sequencing. CONCLUSION To the best of our knowledge, this is the first case of P. jirovecii and L. pneumophila coinfection found in a DLBCL patient. Clinicians should be aware of the risk of complicated infection in patients undergoing long-term chemotherapy.

Nontuberculous mycobacteria infections present mostly pulmonary characteristics. However, the incidence of skin and soft tissue infections caused by nontuberculous mycobacteria has increased in part due to the increased popularity of cosmetic and plastic surgery. Here, we report a case of Mycobacterium agri infection. The patient underwent a one-year course of anti-infection therapy. To the best of our knowledge, this is the first report of a previously healthy patient presenting a skin and soft tissue infection caused by Mycobacterium agri. Clinical personnel should be aware of possible causes of persistent skin and soft tissue infection after cosmetic and plastic surgery.