General forums
The forums in alphabetical order:
X-linked cerebral adrenoleukodystrophy
X-linked dominant chondrodysplasia punctata
XLH
X-linked diffuse leiomyomatosis - Alport syndrome
X-linked ichthyosis
X-linked lymphoproliferative disease
X-linked retinoschisis
Xanthelasma
Xeroderma pigmentosum