MRCP2-2484
A 25-year-old woman presents with sudden-onset dysarthria and right-sided weakness. You see her 10 h after the event and her symptoms have now resolved. She takes the birth control pill. She is employed full-time and smokes 5–10 cigarettes daily. Alcohol intake is minimal. She lives with her partner. Family history is unremarkable other than a possible deep vein thrombosis in her grandfather.
The examination is unremarkable, other than a lacy rash over her thighs and a grade II ejection systolic murmur. Computed tomography of the brain performed 2 h after admission is unremarkable.
Investigations reveal the following:
Haemoglobin (Hb) 120 g/l 115–155 g/l
White cell count (WCC) 4.0 × 109/l 4.0–11.0 × 109/l
Platelets (PLT) 140 × 109/l 150–400 × 109/l
Partial thromboplastin time (PTT) 42 s 23.0–35.0 s
What is the most likely identity of the rash?