1- What is the name of this sign ?
Erythema multifrom
2- What are the causes ?
HSV present in almost all cases
50% of cases are idiopathic
others :
- Bacterial (including BCG vaccination, haemolytic Streptococci, legionellosis, leprosy, Neisseria meningitidis, Mycobacterium, Pneumococcus, Salmonella species, Staphylococcus species, Mycoplasma pneumoniae), Chlamydial
- Fungal
- Parasitic (Trichomonas species, Toxoplasma gondii)
- Viral (especially Herpes simplex).
- Drug reactions, most commonly to: Antibiotics (including, sulphonamides, penicillin), anticonvulsants (phenytoin, barbiturates), aspirin, antituberculoids, and allopurinol and many others.
- Physical factors - Radiotherapy, cold, sunlight
- Others - Collagen diseases, vasculitides, non-Hodgkin lymphoma, leukaemia, multiple myeloma, myeloid metaplasia, polycythemia
0 comments:
Post a Comment