KRIT1 Gene in Patients with Cerebral Cavernous Malformations: Clinical Features and Molecular Characterization of Novel Variants.

Cerebral cavernous malformations (CCMs) are vascular malformations that may result in headaches, seizures, focal neurological deficits, and hemorrhage. CCMs occur sporadically (80%) or in familial form (20%), with autosomal dominant inheritance. Among the three CCM-related genes, mutations in KRIT1 account for 53-65% of familial cases and more than 100 different mutations have been identified so far. In the present work, we describe the clinical, neuroradiological, and genetic findings of sixteen CCM Italian patients, 13 belonging to 4 unrelated families and 3 sporadic cases. Six distinct KRIT1 gene variants, two novel (c.1730+1_1730+3del, c.1664 C>T) and four previously described (c.966G>A, c.1255-1G>A c.1197_1200del, c.1255-1_1256del), were identified, including a possible de novo mutation. All the variants resulted in a premature stop codon. Cerebral 1.5 T magnetic resonance imaging showed multiple CCMs in all the mutation carriers for whom it was available, including sporadic cases. One patient had also cutaneous angiomas. Among the mutation carriers, symptomatic patients constituted 66% and a variable phenotypic expression was observed. Our data confirms phenotypic variability and incomplete penetrance of neurological symptoms in KRIT1-positive families, expands the mutational spectrum of this gene, and highlights how sporadic cases with multiple lesions need an approach similar to individuals with familial CCM.

Síndrome de Klippel-Trenaunay en un recién nacido / Klippel-Trenaunay Syndrome in a newborn

Se describe el caso clínico de un recién nacido, asistido en el Hospital General Docente Dr Juan Bruno Zayas Alfonso de Santiago de Cuba, sin antecedentes patológicos maternos ni familiares, quien presentaba macrocefalia, asimetría de los miembros inferiores, marcada hipertrofia en el miembro inferior izquierdo y macrodactilia, así como angiomas cutáneos en el área inferior del tronco, en el abdomen, la región glútea y las piernas. Luego de una evaluación detallada por parte de un equipo multidisciplinario, que se basó en el cuadro clínico y el estudio radiográfico, se diagnosticó el síndrome de Klippel-Trenaunay. El paciente ha mantenido una evolución favorable hasta el momento actual y se continúa un estricto seguimiento médico.

The case report of a newborn, assisted in Dr Juan Bruno Zayas Alfonso Teaching General Hospital in Santiago de Cuba is described, without maternal or family pathological history who presented macrocephalic asymmetry of the lower members, marked hypertrophy in the left low member and macrodactilia, as well as cutaneous angiomas in the lower area of the trunk, abdomen, buttocks region and legs. After a detailed evaluation by a multidisciplinary team which was based on the clinical pattern and radiographical study, the Klippel-Trenaunay syndrome was diagnosed. The patient has maintained a favorable clinical course up to now and a strict medical follow-up is carried out.

Síndrome de Klippel-Trenaunay en un recién nacido / Klippel-Trenaunay Syndrome in a newborn

Se describe el caso clínico de un recién nacido, asistido en el Hospital General Docente Dr Juan Bruno Zayas Alfonso de Santiago de Cuba, sin antecedentes patológicos maternos ni familiares, quien presentaba macrocefalia, asimetría de los miembros inferiores, marcada hipertrofia en el miembro inferior izquierdo y macrodactilia, así como angiomas cutáneos en el área inferior del tronco, en el abdomen, la región glútea y las piernas. Luego de una evaluación detallada por parte de un equipo multidisciplinario, que se basó en el cuadro clínico y el estudio radiográfico, se diagnosticó el síndrome de Klippel-Trenaunay. El paciente ha mantenido una evolución favorable hasta el momento actual y se continúa un estricto seguimiento médico(AU)

The case report of a newborn, assisted in Dr Juan Bruno Zayas Alfonso Teaching General Hospital in Santiago de Cuba is described, without maternal or family pathological history who presented macrocephalic asymmetry of the lower members, marked hypertrophy in the left low member and macrodactilia, as well as cutaneous angiomas in the lower area of the trunk, abdomen, buttocks region and legs. After a detailed evaluation by a multidisciplinary team which was based on the clinical pattern and radiographical study, the Klippel-Trenaunay syndrome was diagnosed. The patient has maintained a favorable clinical course up to now and a strict medical follow-up is carried out(AU)

Neurodermatology.

Since the skin and the central and/or peripheral nervous system share a common source (the ectoderm), numerous genetic and acquired diseases (infectious, tumoral or autoimmune disorders) equally affect both. Neurologic diseases or symptoms such as stroke, cerebral or medullary vascular malformations, peripheral, brain or medullary tumors, epilepsy, ataxia, neurologic infections, or cognitive disorders (dementia, mental retardation) may be associated with specific cutaneous manifestations of which the discovery can facilitate the final diagnosis, thereby leading to specific treatment and/or genetic investigations. Careful examination of the skin, hair, and nails by the neurologist is consequently of the utmost importance; when unusual abnormalities of the skin are discovered or when greater expertise is required, consultation with a dermatologist is frequently advisable.