The rare association of congenital glaucoma, giant melanocytic nevus, alopecia, and hypospadias in an Egyptian child with neurofibromatosis type 1: a case report

Abstract

Background Neurofibromatosis type 1 (NF1) is a multisystem genetic disorder that commonly involves skin, nerves, and skeletal system with increased neoplastic predisposition. This disease has been rarely associated with multiple congenital anomalies. Herein, we describe an Egyptian child with NF1 and coexistent bilateral congenital glaucoma, giant congenital melanocytic nevi (GCMN), alopecia, and hypospadias. Case presentation A 2.5-year-old boy presented with developmental delay, back swelling, and multiple congenital anomalies. His father and two sisters were known to have NF1. The child was diagnosed with bilateral primary congenital glaucoma at the age of 3.5 months and underwent trabeculectomy with mitomycin C therapy. Examination at the age of 5 months revealed marked hypotonia, multiple GCMN, scanty café-au-lait macules, left upper eyelid plexiform neuroma and trichomegaly, hypertrichosis of left eyebrow, hypertelorism, depressed nasal bridge, left frontal scalp alopecia, and distal penile hypospadias. At the age of 8 months, brain imaging depicted a markedly dilated left lateral ventricle, and he underwent ventriculoperitoneal shunt surgery. The child developed back swelling at the age of 2.5 years, and a spinal magnetic resonance image showed bilateral multiple spinal neurofibromas in the paraspinal region with intraspinal extensions. A whole exome sequencing identified a heterozygous missense variant NM_001042492.3:c.1466A > G (NP_001035957.1:p.Tyr489Cys) in NF1 gene. Conclusions The present case report adds to the knowledge of the phenotypic spectrum and variability of NF1 by reporting the association of multiple unusual congenital anomalies. Importantly, such congenital anomalies could be the first presenting features in patients with NF1 since cafe´-au-lait macules and other typical diagnostic criteria may not be apparent in the neonatal period and early infancy. Accordingly, NF1 should be considered in newborns with congenital glaucoma, GCMN, scalp alopecia, and hypospadias.