Noonan Syndrome with Multiple Lentigines and PTPN11 Mutation: A Case with Intracerebral Hemorrhage

Abstract

Noonan syndrome with multiple lentigines (NSML), previously known as LEOPARD syndrome, is a rare autosomal dominant disorder with an unknown prevalence. Characteristics of this disease include cutaneous, neurologic, and cardiologic abnormalities. In this case report, we present a 12-year-old girl who was admitted to the emergency department for acute-onset left weakness, unsteady gait, nausea, and vomiting. Her physical exam notably showed left side upper motor neuron signs and dysmetria. CT scan revealed an acute hemorrhage of the right thalamus. Physical exam exhibited several craniofacial dysmorphisms and lentigines. The genetic test revealed a heterozygous missense mutation in the protein tyrosine phosphatase non-receptor type 11 (<i>PTPN11</i>) gene and a variant of unknown significance of the <i>MYH11</i> gene. To the best of our knowledge, this is the first case of a patient with NSML presenting an intracerebral hemorrhage.