Many types of<unk>  exist, and an exact diagnosis may be difficult. Types of<unk>  are classified by their appearance, if they are syndromic or not, and by mode of inheritance. For example, non-syndromic<unk>  that are inherited recessively come under the umbrella term autosomal recessive congenital<unk>  (ARCI).<unk>  caused by mutations in the same gene can vary considerably in severity and symptoms. Some<unk>  do not appear to fit exactly into any one type while mutations in different genes can produce<unk>  with similar symptoms. Of note, X-linked<unk>  is associated with Kallmann syndrome (close to the KAL1 gene). The most common or well-known types are: Non-syndromic<unk>  + Name OMIM Mode Of Inheritance Gene(s)<unk>  vulgaris Autosomal semi-dominant FLG X-linked recessive<unk>  X-linked recessive STS Harlequin<unk>  Autosomal recessive ABCA12 Congenital<unk> orm erythoderma Autosomal recessive TGMI1, NIPAL4, ALOX12B, ALOXE3, ABCA12, CYP4F22, NIPAL4, LIPN, CERS3, PNPLA1, ST14, CASP14 Lamellar<unk>  Autosomal recessive TGMI1, NIPAL4, ALOX12B, ALOXE3, ABCA12, CYP4F22, NIPAL4, LIPN, CERS3, PNPLA1, ST14, CASP14 Self improving congenital<unk>  Autosomal recessive TGM1, ALOX12B, ALOXE3 Bathing suit<unk>  Autosomal recessive TGMI1 Epidermolytic<unk>  Autosomal dominant KRT1, KRT10 Superficial epidermolytic<unk>  Autosomal dominant KRT2 Annular epidermolytic<unk>  Autosomal dominant KRT1, KRT10<unk>  Curth-Macklin Autosomal dominant KRT1 Autosomal recessive epidermolytic<unk>  Autosomal recessive KRT10 Congenital reticular<unk> orm erythroderma Autosomal dominant KRT1, KRT10 Epidermolytic nevi Postzygotic mosaicism KRT1, KRT10 Loricrin keratoderma Autosomal dominant LOR Erythrokeratodermia variabilis Autosomal dominant GJB3, GJB4 Peeling skin disease Autosomal recessive CDSN Keratosis linearis with<unk>  congenita and sclerosing keratoderma Autosomal recessive POMP Syndromic<unk>  + Name OMIM Mode Of Inheritance Gene (s) X-linked recessive<unk>  syndromic forms X-linked recessive STS<unk>  follicularis with alopecia and photophobia syndrome X-linked recessive MBTPS2 Conradi-Hunermann-Happle syndrome X-linked dominant EBP Netherton syndrome Autosomal recessive SPINK5<unk> -hypotrichosis syndrome Autosomal recessive ST14 Trichothiodystrophy Autosomal recessive ERCC2, ERCC3, GTF2H5 Trichothiodystrophy (non-congenital forms) Autosomal recessive C7Orf11, TTDN1 Sjögren-Larsson syndrome Autosomal recessive ALDH3A2 Refsum's disease Autosomal recessive PHYH, PEX7 Mental retardation, enteropathy, deafness, neuropathy,<unk> , keratoderma syndrome Autosomal recessive SNAP29 Arthrogryposis, renal dysfunction, cholestasis syndrome Autosomal recessive VPS33B Keratitis-ichthosis-deafness syndrome Autosomal dominant GJB2 Neutral lipid storage disease with<unk>  Autosomal recessive ABHD5<unk>  prematurity syndrome Autosomal recessive SLC27A4 Neu–Laxova syndrome autosomal recessive PHGDH , PSAT1 and PSPH Non-genetic<unk> <unk>  acquisita
Ichthyosis
Ocular melanosis
Band keratopathy
Lamellar ichthyosis
Ocular rosacea
Melasma
Bullous keratopathy
Erythrasma