Some figures for atopic eczema

1. Concordance rate is 80% and 20% in monozygotic and dizygotic twins respectively.
2. If both parents have atopic eczema, 75% chance the child with develope atopic eczema.
3. 75% develope before 6/12, 80-90% develope before 5 yrs old
4. 66% remit before age of 10.

Genetic facts of psoriasis

1. Concordant in 70% monozygotic twins and only 20% in dizygotic twins
2. One parent affected, 16% child will be affected
3. Both parents affected, 50% child will be affected
4. If none of parents affected, but one sibling affected, the subsequent child is 10% affected

Mimicker of angioedema

CT ds: LE, DM, vasculitis
Granuloma: silicone, sarcoid, granulomatous cheilitis, MR syndrome
Infection: Erysipelas
Neoplasm: Myeloma, SVC
Inflammation: ACD, Rosacea
Drug induced: Fixed drug eruption
Fat

Annular lesions

Source: http://www.aafp.org

Malassezia furfur

Causal relationship with:
1. Pityriasis vesicolor
2. Seborrheic dermatitis
3. Pitysporum folliculitis
4. Confluent and reticulate papillomatosis