Gastroenterology Abdomen Other

Erythema Nodosum

Characterized by red, painful nodules (histologically it is a panniculitis) most often seen on the lower extremities (shins, calves, thighs, ankles) and it generally flares when the inflammatory bowel disease flares. Erythema nodosum is also seen in TB, sarcoidosis, some strep infections, and as an allergic response to certain medications.
Gastroenterology

Patient 4

This is a young man who presented with several months of abdominal pain, weight loss, and blood diarrhea, and was found to have erythema nodosum on examination, and ultimately diagnosed with inflammatory bowel disease.

Image courtesy of “Frameworks for Internal Medicine”