[A case or Leber hereditary optic neuropathy (LHON): differential diagnosis with post inflammatory atrophy of nerve II using the mtDNA analysis].

The Leber hereditary optic neuropathy (LHON) is a disease due to a mtDNA mutation. The disorder results from enzymatic perturbations in the mitochondrial respiratory chain. Clinically the LHON may present as a progressive axonal atrophy of the optic nerves with or without other neurological symptoms.

[Sex chromatin and cytohormone smear in premature and dystrophic newborn during the first week of life].

In newborn females parallel investigations on: a) oestrogenisation symptoms, b) vaginal epithelium smears stained modo Shorr, c) sex chromatin positive nuclei in buccal epithelium smears, have been performed. Low frequency of sex chromatin in the day after birth suggested a relationship between hormone level and Barr bodies' appearance.