Toluene embryopathy

Toluene embryopathy, also known as fetal toluene syndrome or toluene embryofetopathy, is a pattern of birth defects caused by maternal exposure to toluene during pregnancy, most commonly through deliberate inhalation (solvent abuse or 'glue sniffing'). Toluene is an organic solvent found in paints, glues, nail polish, and other industrial products. This condition is not inherited but results from the teratogenic effects of toluene on the developing fetus. The condition affects multiple body systems. Key clinical features include craniofacial abnormalities resembling fetal alcohol syndrome (such as microcephaly, short palpebral fissures, a smooth philtrum, thin upper lip, and midface hypoplasia), intrauterine growth restriction, and postnatal growth deficiency. Musculoskeletal abnormalities may include limb anomalies and nail hypoplasia. Renal anomalies, including renal tubular acidosis, have been reported. Neurodevelopmental impairment is a prominent feature, with affected children frequently demonstrating intellectual disability, developmental delay, speech and language difficulties, attention deficits, and hyperactivity. There is no specific cure or targeted treatment for toluene embryopathy. Management is supportive and multidisciplinary, focusing on early intervention services, developmental therapies (speech, occupational, and physical therapy), and monitoring for associated medical complications such as renal dysfunction. Prevention through avoidance of toluene exposure during pregnancy is the most important strategy. The prognosis depends on the severity of organ involvement and the degree of neurodevelopmental impairment.

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