A single worm-like structure in a urine collection bag: a case report

The presence of a foreign body resembling a worm in a urine collection bag should lead to etiological investigation, as it may not be a parasite. It is thus important to consider the context and origin of the patient, together with the size, length, appearance, and characteristics of the suspected worm.

The presence of an apparently mobile black filament resembling a worm was reported in the urine collection bag of a 77-year-old African male resident of our long-term care facility. We initially suspected a parasitic infection. The description of this foreign body suggested Dioctophyma renale (giant kidney worm); however, the analysis of the sample concluded that it was a blood clot. Its worm-like appearance was due to the tube-like nature of the urethra, causing the blood clot to be squeezed into a worm-like shape.

Such presentations can be misleading and may lead to unnecessary concern and investigations. A parasitological analysis can be essential for precise diagnosis.