Trichomegaly-retina pigmentary degeneration-dwarfism syndrome

Trichomegaly-retina pigmentary degeneration-dwarfism syndrome, also known as Oliver-McFarlane syndrome, is an extremely rare genetic disorder characterized by a distinctive combination of features affecting multiple body systems. The hallmark feature is trichomegaly — abnormally long eyelashes — accompanied by pigmentary degeneration of the retina (similar to retinitis pigmentosa), which can lead to progressive vision loss. Affected individuals also exhibit proportionate short stature (dwarfism) related to growth hormone deficiency or other pituitary hormone deficiencies. Additional features may include intellectual disability, alopecia of the scalp, sparse eyebrows and body hair contrasting with the long eyelashes, and anterior pituitary dysfunction leading to various endocrine abnormalities including hypogonadism and hypothyroidism. The syndrome affects the eyes, endocrine system, hair, and central nervous system. Chorioretinal atrophy and pigmentary retinal degeneration are progressive and may result in significant visual impairment. The condition has been linked to mutations in the PNPLA6 gene, which encodes neuropathy target esterase, an enzyme important for phospholipid homeostasis in neurons and other tissues. Inheritance follows an autosomal recessive pattern. There is currently no cure for this syndrome. Management is supportive and multidisciplinary, involving ophthalmologic monitoring and low-vision aids, hormone replacement therapy for pituitary deficiencies (including growth hormone therapy for short stature), and developmental support as needed. Regular endocrine and ophthalmologic evaluations are essential for optimizing outcomes. Fewer than 30 cases have been reported in the medical literature.

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