1 The results of prophylactic measures for femoral head AVN have considerable variation, but certain generalizations can safely be stated. 2  Namely, the clinical results of core decompression alone deteriorate with more advanced lesions.
1 Melasma is very common skin ailment. It can occur to anyone, but young women with brownish tone are more likely to contract with it.  The condition is often linked with female hormonal changes. Change in level of estrogen and progesterone may cause melasma.
Anyone can get melasma, but it is more common among young women. Melasma often appears during pregnancy, in the second or third trimesters. It is sometimes called the mask of pregnancy.. Doctors don't know exactly what causes melasma, but the condition is associated with the female hormones estrogen and progesterone.