Indication
This is a clinical test intended for HelpPurposes or indications for the test. Lab-provided.: Diagnosis, Recurrence, Risk Assessment
Autosomal recessive congenital ichthyosis (ARCI) encompasses several forms of nonsyndromic ichthyosis. Although most neonates with ARCI are collodion babies, the clinical presentation and severity of ARCI may vary significantly, ranging from harlequin ichthyosis, the most severe and often fatal form, to lamellar ichthyosis (LI) and (nonbullous) congenital ichthyosiform erythroderma (CIE). These phenotypes are now recognized to fall on a continuum; however, the phenotypic descriptions are clinically useful for clarification of prognosis and management. Infants with harlequin ichthyosis are usually born prematurely and are encased in thick, hard, armor-like plates of cornified skin that severely restrict movement. Life-threatening complications in the immediate postnatal period include respiratory distress, feeding problems, and systemic infection. Collodion babies are born with a taut, shiny, translucent or opaque membrane that encases the entire body and lasts for days to weeks. LI and CIE are seemingly distinct phenotypes: classic, severe LI with dark brown, plate-like scale with no erythroderma and CIE with finer whiter scale and underlying generalized redness of the skin. Affected individuals with severe involvement can have ectropion, eclabium, scarring alopecia involving the scalp and eyebrows, and palmar and plantar keratoderma. Besides these major forms of nonsyndromic ichthyosis, a few rare subtypes have been recognized, such as bathing suit ichthyosis, self-improving collodion ichthyosis, or ichthyosis-prematurity syndrome.
- Ectropion
- Proptosis
- Rigidity
- Congenital ichthyosiform erythroderma
- Premature birth
- Short finger
- Everted lower lip vermilion
- Motor delay
- Failure to thrive
Show allThe Invitae Congenital Ichthyosis Panel analyzes genes that are associated with congenital or early onset ichthyosis and related skin diseases, which are characterized by thick, dry, scaly, and/or reddened skin, a collodion membrane, or thickening of the skin on the palms and soles at birth or in early childhood. These genes were selected based on the available evidence to date to provide a broad analysis for inherited congenital ichthyosis. The genetic heterogeneity associated with these conditions can make it difficult to use phenotype as the sole criterion to select a definitive cause. Broad panel testing allows for an efficient evaluation of several potential genes based on a single clinical indication. Genetic testing of these genes may confirm a diagnosis and help guide treatment and management decisions. Identification of a disease-causing variant can inform recurrence-risk assessment and genetic counseling.
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