TY - JOUR
T1 - Ichthyosis and Keratotic Follicular Plugs Containing Dystrophic Calcification in Newborns
T2 - Distinctive Histopathologic Features of X-Linked Dominant Chondrodysplasia Punctata (Conradi-Hünermann-Happle Syndrome)
AU - Hoang, Mai P.
AU - Carder, K. Robin
AU - Pandya, Amit G.
AU - Bennett, Michael J.
PY - 2004/2
Y1 - 2004/2
N2 - Prior to the recent characterization of the enzymatic defect and identification of the involved gene, the histopathology of X-linked dominant chondrodysplasia punctata (Conradi-Hünermann-Happle syndrome or CDPX2) has been described under various names including calcinosis universalis, chondrodystrophia calcificans congenita, Conradi disease, and Conradi-Hünermann syndrome. We present two newborns with characteristic ichthyosiform erythrodemia noted at birth. Radiographs demonstrated chondrodysplasia punctata in one patient. Although the x-ray performed at birth was negative in the other patient, sterol analyses of the keratotic scales were diagnostic for CDPX2. Skin biopsies from both patients showed thick laminated orthokeratosis and prominent keratotic follicular plugs containing dystrophic calcification. We also retrospectively examined 20 cases of various types of ichthyosis seen over a 23-year period at our institution. Intracorneal calcium deposition was not seen in any of these cases. As demonstrated by our cases and review of the literature, dystrophic calcification in the keratotic plug is a distinctive histopathologic feature of Conradi-Hünermann-Happle syndrome in newborns and is not seen in other known forms of ichthyoses.
AB - Prior to the recent characterization of the enzymatic defect and identification of the involved gene, the histopathology of X-linked dominant chondrodysplasia punctata (Conradi-Hünermann-Happle syndrome or CDPX2) has been described under various names including calcinosis universalis, chondrodystrophia calcificans congenita, Conradi disease, and Conradi-Hünermann syndrome. We present two newborns with characteristic ichthyosiform erythrodemia noted at birth. Radiographs demonstrated chondrodysplasia punctata in one patient. Although the x-ray performed at birth was negative in the other patient, sterol analyses of the keratotic scales were diagnostic for CDPX2. Skin biopsies from both patients showed thick laminated orthokeratosis and prominent keratotic follicular plugs containing dystrophic calcification. We also retrospectively examined 20 cases of various types of ichthyosis seen over a 23-year period at our institution. Intracorneal calcium deposition was not seen in any of these cases. As demonstrated by our cases and review of the literature, dystrophic calcification in the keratotic plug is a distinctive histopathologic feature of Conradi-Hünermann-Happle syndrome in newborns and is not seen in other known forms of ichthyoses.
KW - Conradi-Hünermann-Happle syndrome
KW - Dystrophic calcification
KW - Ichthyosiform erythroderma
KW - X-linked dominant chondrodysplasia punctata
UR - http://www.scopus.com/inward/record.url?scp=1642569150&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1642569150&partnerID=8YFLogxK
U2 - 10.1097/00000372-200402000-00007
DO - 10.1097/00000372-200402000-00007
M3 - Article
C2 - 14726822
AN - SCOPUS:1642569150
SN - 0193-1091
VL - 26
SP - 53
EP - 58
JO - American Journal of Dermatopathology
JF - American Journal of Dermatopathology
IS - 1
ER -