Legs

Question 1

Describe this picture and what are the causes?

Answer 1

• Painful, subcutaneous nodules on both pretibial (anterior leg) surfaces
  Findings suggest: Erythema Nodosum

(Less common on other areas of the skin)

Caused by:
* Idiopathic (most common)
* Infection (such as: Streptococcocal pharyngitis, Histoplasmosis, Coccidiomycosis, TB, Leprosy)
* Autoimmune diseases (such as: Sarcoidosis,Crohn’s disease,Ulcerative colitis,Behcet syndrome)
* Drugs (such as: Oral contraceptives, Sulfonamides, Iodide)
* Pregnancy
* Malignancy

Question 2

Describe this picture and what is it associated with?

Answer 2

Right: an ulcer with a purple and undermined edge
Left: a small pustule

Findings suggest: Pyoderma gangrenosum

Associated with:
* Rheumatoid arthritis
* Irritable bowel disease (IBD)
* Trauma

Note: Pyoderma gangrenosum is a Neutrophilic Dematosis. It starts out as a small pustule, red bump or blood bister (often misinterpreted as a insect bite), then breaks down into an ulcer. They are very painful