Related Experiment Video
Updated: Feb 7, 2026

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
Published on: May 16, 2025
Polyarticular septic arthritis caused by Staphylococcus lugdunensis in a patient with systemic lupus erythematosus
Anita Laloo1,2, Vasileios C Kyttaris1,2
1Department of Rheumatology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
Abstract:
Septic arthritis in patients with systemic lupus erythematosus (SLE) is rare and is reported in only 3% of patients. Contrary to lupus arthritis, which tends to be polyarticular in nature, primarily involving the small joints of the hands, septic arthritis is commonly monoarticular. Here, we present an unusual case of a patient with SLE, who developed oligoarticular inflammatory arthritis caused by a rare native joint pathogen Staphylococcus lugdunensis. The infection resulted in extensive early damage to the joints involved, highlighting the need for early diagnosis and treatment.
Related Concept Videos
Second Order systems II
First Order Systems
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...
Second Order systems I
By reinterpreting the system, one can derive the closed-loop transfer function, which...
Thermodynamic Systems
Consider an example of tea boiling in a kettle. The...
Classification of Systems-I
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
Classification of Systems-II

