Hypomelanosis of Ito, also called incontinentia pigmenti achromians, is a rare birth . Although hypomelanosis of Ito syndrome is most commonly a de novo. Hypomelanosis of Ito (IH) or incontinentia pigmenti achromians (Mendelian Inheritance in .. Pascual-Castroviejo I, López-Rodriguez L, de la Cruz Medina M. La hipomelanosis de ito, es un síndrome neurocutáneo con un grado de despigmentación dérmica variable y alteraciones del neurodesarrollo.

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Ophthalmological evaluation as well as full chromosomal analysis revealed normal results. HI is generally sporadic, but autosomal dominant, recessive and X-linked modes of inheritance have occasionally been reported.

Neurological, skeletal and ocular symptoms have also been reported. The diversity of chromosome rearrangements seemed to argue against a monogenic nature of this disorder, but the existence of deletion in 1 case and of supernumerary fragments in 2 other cases suggested to Turleau et al.

Donnai and Read emphasized the paramount importance of mosaicism either for a chromosomal abnormality or for a point mutation in this disorder.

The neurologic aspects of hypomelanosis of Ito: Case report and review of the literature

The disorder is characterized by unilateral or bilateral macular hypopigmented whorls, streaks, and patches which are described as the ‘negative pattern’ of the hyperpigmented lesions of incontinentia pigmenti.

Flannery commented on pigmentary dysplasias and genetic mosaicism. Clinical description HI is causally heterogeneous and, with the exception of the pigmentary skin anomalies that are by definition mandatory for recognition of the condition, the phenotypic presentation is very variable.

Diagnostic methods Cutaneous ultrastructural analysis shows a decreased number of melanocytes, containing fewer melanosomes. Further evidence for functional disomy of Xp. Single maxillary central incisor and coloboma in hypomelanosis of Ito.


A wide variation of neurologic involvement is reported in HI including: Open in a separate window. Incontinentia pigmenti IP and r X: Biopsy was refused in the case of the daughter.

Orphanet: Hipomelanosis de Ito

The magnetic resonance imaging scan ofthe brain revealed normal result with no evidence of neuronal migration disorders, cortical dysplasia or hemimegaloencephaly. They pointed to 3 earlier reports of chromosomal rearrangements in this disorder, all of different types.

Mendelian Inheritance in Man [Internet] 12th hipomeoanosis. The skin phenotype is characterized by unusual unilateral or bilateral cutaneous macular hypopigmented whorls, streaks and patches, hipomelabosis to the lines of Blaschko, that usually develop within the first two years of life.

Health care resources for this disease Expert centres Diagnostic tests 2 Patient organisations 63 Orphan drug s 0. To the best of our knowledge the association of bilateral golbus pallidi lesions particularly lesions of iron accumulations and HI has not, hitherto, been reported.

Journal of Child Neurology ; Association of pigmentary anomalies with chromosomal and genetic mosaicism and chimerism. These were non- inflammatory with no history of previous trauma and no family history of vitilligo. Mosaicism in cutaneous pigmentation. Updated 27 January Interestingly, hypomelanosis of Ito have been reported in association with certain tumors like cystic teratoma of mediastinum in association with diploic epidermoid cyst of bone, complex mature sacrocoxygeal dysembryonal tumor, choroid plexus papilloma and dental hamartomatous tumor, and rarely malignant tumors such as acute lymphoblastic leukemia, meduloblastoma, neuroblastoma and primary meningeal rhabdomyosarcoma.

Other manifestations include patchy alopecia, nail abnormalities include ridging, dystrophy, and absence of nails.

The hypopigmented areas of skin of hipomelansis patient correspond to the Blaschko lines that was first described in by the German dermatologist Alfred Blaschko [ 2829 ].


Author information Copyright and License information Disclaimer. They concluded that the breakpoints in 3 of the 5 patients whom they studied was separated by a distance of at least 1, kb. Molecular linkage study looking for mutation in PLA2G6, common gene mutation associated with iron deposition neurodegenerative disorders, revealed a negative result.

The neurologic aspects of hypomelanosis of Ito: Case report and review of the literature

Incontinentia pigmenti and X-autosome translocations: Annals of Neurology ; He was started on vitamin D and L-thyroxin. They noted that there was no history of bullous lesions in these cases.

Cutaneous ultrastructural analysis shows a decreased number of melanocytes, containing fewer melanosomes. On the basis of studies of linear skin diseases, Jackson reviewed Blaschko’s work and reproduced some of the original drawings. The severity and area of involvement of skin changes are related to the time hipomepanosis development of the mosaic event that causes the pigmentation abnormalities. Hypomelanosis of Ito incontinentia pigmenti achromians and mosaicism for a itoo of 15q1.

Cytogenetic analysis performed in one of the daughters in showed no visible abnormality, but translocation of a small segment hipojelanosis have gone unnoticed. Journal of Medical Genetics ; Skeletal defects include short stature, facial and limb asymmetry, tooth abnormalities, pectus carinatum or excavatumscoliosis, and finger anomalies.

Nevus depigmentosus and hypomelanosis of Ito are synonymous. Segmental lentiginosis with ipsilateral nevus depigmentosus: Incontinentia pigmenti versus hypomelanosis of Ito: American Journal of Medical Genetics ; Parent-child affection was reported by Grosshans et al. Q-banding analysis showed that the translocated chromosomes were of paternal origin.

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