Retroperitoneal suppurative lymphadenitis complicating Staphylococcus aureus acute bacterial endocarditis

Area of Science:

• Infectious Diseases
• Microbiology
• Clinical Medicine

Background:

• Acute bacterial endocarditis is a severe infection of the heart's inner lining.
• Staphylococcus aureus is a frequent causative agent of acute bacterial endocarditis.
• Metastatic infections are common complications, affecting organs like the brain, heart, lungs, kidneys, and joints.

Observation:

• This case report describes a rare complication of Staphylococcus aureus endocarditis.
• The patient presented with suppurative lymphadenitis affecting the retroperitoneal lymph nodes.
• This represents a previously undocumented site of metastatic infection in S. aureus endocarditis.

Findings:

• Metastatic involvement of lymph nodes, specifically retroperitoneal and mesenteric lymph nodes, secondary to Staphylococcus aureus acute bacterial endocarditis has not been previously reported.
• This case highlights suppurative lymphadenitis as a potential, albeit rare, metastatic manifestation.
• The findings expand the known spectrum of complications associated with S. aureus endocarditis.

Implications:

• This case broadens the understanding of Staphylococcus aureus endocarditis pathophysiology.
• Clinicians should consider lymph node involvement in the differential diagnosis of metastatic infections in patients with S. aureus endocarditis.
• Further research may be warranted to elucidate the mechanisms and incidence of lymph node metastasis in this condition.