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A Unique Case of JOAG With Lamellar Ichthyosis With Rickets: A Case Report and Review of the Literature

Purpose:Ichthyosis is known to have ocular associations such as blepharitis, hypertrophic conjunctivitis, corneal vascularization, ectropion, lagophthalmos, etc. However, no reports of its association with glaucoma are there, to the best of our knowledge. We report a unique case of juvenile open-angle glaucoma (JOAG) with lamellar ichthyosis. Method:A 16-year-old male child presented with a gradual, painless progressive diminution of vision in both eyes over a period of 3 years. Systemic examination revealed stunted body growth with knock-knees, suggestive of late-onset rickets. Generalized dry scaly lesions with erythema, along with hyperkeratosis of the palms and the soles, suggestive of lamellar ichthyosis were present. On ocular examination, the intraocular pressure was 36 mm Hg; optic nerve head examination revealed a horizontally oval disc with near total cupping in the right eye and total cupping in the left eye, with extensive neuroretinal rim thinning and pallor. Gonioscopy showed wide open angles with prominent iris processes. Screening of JOAG-associated genes (MYOC, NTF4, WDR36, and CYP1B1) and ichthyosis-associated gene (TGM1) was performed by the direct PCR-sequencing method. Results:A diagnosis of JOAG with advanced glaucomatous optic neuropathy with lamellar ichthyosis and rickets was made. The patient underwent right followed by left eye trabeculectomy with 0.2 mg/dL MMC (for 1 min). Postoperatively, the intraocular pressure was 8 mm Hg at 1 week, and 12 to 14 mm Hg at the 6-week, the 3-month, and the 6-month follow-up, and the visual acuity was maintained in the right eye. No mutations in MYOC, NTF4, WDR36, CYP1B1, and TGM1 were observed in the patient and his family. Conclusions:An association of glaucoma with ichthyosis should be kept in mind. Therefore, a detailed baseline ocular examination in children with ichthyosis is required, as early detection of glaucoma could prevent irreversible blindness.