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Ichthyosis Fetalis: Treatment & Medication
Updated: Oct 21, 2008
- Overview
- Differential Diagnoses & Workup
- Treatment & Medication
- Follow-up
- Multimedia
Treatment
Medical Care
- Ensure that the ichthyosis fetalis patient's airway, breathing, and circulation are stable after delivery. Babies require intravenous access. Peripheral access may be difficult. Umbilical cannulation may be necessary.
- Place infants in a humidified incubator. Monitor temperature, respiratory rate, heart rate, and oxygen saturation. Once stabilized, transfer newborns with HI to a level 3 neonatal nursery.
- Exposure keratitis results from ectropion of the eyelids. Apply ophthalmic lubricants frequently to protect the conjunctivae.14 Bathe infants twice daily. Use frequent applications of wet sodium chloride compresses followed by bland lubricants to soften hard skin and to facilitate desquamation. Topical keratolytics (eg, salicylic acid) are not recommended in newborns because of potential systemic toxicity.
- Intravenous fluids are almost always required; neonates with ichthyosis fetalis initially do not feed well. Consider excess cutaneous water losses in daily fluid requirement calculations. Monitor serum electrolyte levels. A risk of hypernatremic dehydration exists.
- Maintain a sterile environment to avoid infection. Take frequent cultures of the skin. Growth of pathogenic organisms (eg, Staphylococcus aureus, Pseudomonas aeruginosa) indicates risk of sepsis. Draw blood cultures because sepsis can occur quickly in affected infants. A consensus does not exist regarding the use of prophylactic antibiotics in ichthyosis fetalis patients.
Consultations
- Neonatologist
- Dermatologist
- Medical geneticist
- Social worker
Medication
Enhanced survival and decreased morbidity is reported with the use of systemic retinoids for HI. Retinoids bind to specific retinoic acid receptors and regulate gene transcription. They influence keratinocyte differentiation, normalize abnormal keratinocyte proliferation, and mediate desquamation of hyperkeratotic scale.
Etretinate was first used for the treatment of this disorder in 1985. An effective dose of 1 mg/kg/d was established. Etretinate is no longer available, but it has been replaced by other retinoids with improved safety profiles.15
Isotretinoin is a retinoid that has been used in ichthyosis fetalis. The reported dose is 0.5 mg/kg/d. Treatment is usually initiated within the first few days of life and given orally. Case reports have documented improvement in pliability of the skin, limb movements, sucking, and eyelid closing within a week of starting therapy. Treatment has been continued for several years in some patients, and it may be required indefinitely to prevent relapse.
Acitretin, a carboxylic acid derivative of etretinate, has also been used in neonates with HI.16,17 Initial doses of 1 mg/kg/d have been used with success. Improvement in hyperkeratosis, ectropion, and eclabium is reported. The duration of therapy is variable, and continuous, long-term, daily therapy may be required. The daily dose can be titrated to the degree of ichthyosis.
Liver function and serum lipid levels should be monitored during retinoid therapy. Clinical monitoring for skeletal adverse effects should be done periodically. Before retinoid therapy is considered, discuss the expected outcome and the potential adverse effects with the parents.
Retinoids
These agents decrease the cohesiveness of abnormal hyperproliferative keratinocytes. They modulate keratinocyte differentiation.
Isotretinoin (Accutane)
Synthetic 13-cis isomer of naturally occurring tretinoin (trans -retinoic acid). Both agents structurally related to vitamin A.
Adult
None; HI is a pediatric condition
Pediatric
0.5 mg/kg/d PO
Toxicity may occur with vitamin A coadministration; pseudotumor cerebri or papilledema may occur when coadministered with tetracyclines; acitretin may reduce plasma levels of carbamazepine
Documented hypersensitivity; pregnancy
Pregnancy
X - Contraindicated; benefit does not outweigh risk
Precautions
May decrease night vision; may be associated with hepatitis; occasional exaggerated healing response of acne lesions (excessive granulation with crusting); diabetic patients may have problems controlling their blood glucose level during therapy; patients should use UV protection until tolerance achieved; radiographic findings suggestive of premature closure of epiphyses reported
Acitretin (Soriatane)
Metabolite of etretinate and related to retinoic acid and retinol (vitamin A). Mechanism of action unknown but thought to exert therapeutic effect by modulating keratinocyte differentiation, keratinocyte hyperproliferation, and tissue infiltration by inflammatory cells.
Adult
None; HI is a pediatric condition
Pediatric
1 mg/kg/d initially; duration of therapy variable and continuous; long-term daily therapy may be required; titrate daily dose to degree of ichthyosis
Increases toxicity of methotrexate (avoid concomitant use); coadministration with alcohol may result in formation of etretinate, which has long half-life (>120 d)
Absolute: Pregnancy or woman likely to become pregnant or intends to become pregnant within 3 y of treatment or who cannot use reliable contraception during treatment and for at least 3 y afterward; noncompliance with contraception; nursing mothers; concurrent use of methotrexate (increased liver toxicity) or tetracyclines (pseudotumor cerebri); hypersensitivity
Relative: obesity, leukopenia; moderate-to-severe cholesterol or triglyceride elevation; clinically hepatic or renal dysfunction
Pregnancy
X - Contraindicated; benefit does not outweigh risk
Precautions
Women of childbearing age must be able to comply with effective contraception; contraception should be continued for at least 3 y after treatment; etretinate may form and takes about 2-3 y to clear from body; caution in impaired renal or liver function; test aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) before therapy, q1-2wk until stable, and then at intervals as clinically indicated
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| Overview: Ichthyosis Fetalis |
| Differential Diagnoses & Workup: Ichthyosis Fetalis |
Treatment & Medication: Ichthyosis Fetalis |
| Follow-up: Ichthyosis Fetalis |
| Multimedia: Ichthyosis Fetalis |
| References |
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References
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Further Reading
Keywords
ichthyosis fetalis, harlequin ichthyosis, HI, harlequin baby, ichthyosis congenita, keratosis diffusa fetalis, harlequin fetus
Treatment & Medication: Ichthyosis Fetalis