[Focal dermal hypoplasia associated with pathogenic PORCN gene variant in postzygotic, unilateral mosaic form]. / Fokale dermale Hypoplasie durch pathogene Variante im PORCN-Gen in postzygotischer, unilateraler Mosaik-Konstellation.

We report a case of a 29-year-old woman with subtle partial erythematous, partial hyperpigmented streaks along the Blaschko's lines on the right side of the body since early childhood. Primary DNA results of the skin and blood assay diagnosed focal dermal hypoplasia in mosaic form. The postzygotic mutation in the PORCN gene was only detectable in the affected skin and not in the blood assay. This article illustrates that clinically very discrete hypopigmentation and poikiloderma along Blaschko lines should raise awareness for robust diagnostic analysis in order to recognize this variable multisystem disease and to ensure an appropriate search for extracutaneous abnormalities and human genetic counseling, ideally before pregnancy. Careful correlation of clinical, histological, and genetic features along with close multidisciplinary cooperation of specialists from the fields of human genetics, dermatology, pediatrics, orthopedics and ophthalmology is crucial for final diagnosis, assessment of the prognosis and targeted genetic counseling of affected individuals.

Focal Dermal Hypoplasia.

This case report describes facial atrophic papules with telangiectasias, streaked hypopigmented and hyperpigmented papules on the left side of the trunk and extremities, and soft yellow fat herniations.

Urogenital presentation of a male patient with focal dermal hypoplasia.

Focal dermal hypoplasia (FDH) is a rare X-linked dominant syndrome characterized by streaky cutaneous atrophy in a blaschkoid distribution, skeletal dysplasias, and ocular abnormalities. Here, we report hypospadias and chordee identified in a male patient with molecularly confirmed FDH. This report highlights a new clinical manifestation of male patients with FDH.

Focal Dermal Hypoplasia with Osteopathia Striata.

Background: Focal dermal hypoplasia is a genetic disease of multiple systems initially affecting the skin, skeleton, dental, eyes and face with developmental abnormalities and facial dysmorphism. Focal dermal hypoplasia is X-linked dominant disease affecting the ectoderm, mesoderm and endoderm. 95% feature de novo and 90% of these are females. Focal dermal hypoplasia is induced by a mutation in the PORCN gene. Objective: The aim of this article is to present a case of a one-year-old girl child with multi-hypopigmented reticulated atrophic macules and patches grouped in linear mode at the lines of blaschko, skeleton abnormalities, umbilical hernia, developmental delay, hypoplastic nails, syndactyly and lobster claw deformity. Case report: A one-year-old girl child presented to the dermatology clinic with asymptomatic lesions since childhood with no improvement, with multi- hypopigmented skin lesions on the trunk and extremities since birth as linear erosions that heal gradually during few days, leaving peripheral hypopigmentation with hyperpigmentation with anomalies of limbs and nails and delayed development. She was born by normal vaginal delivery and weighed 2.5 kg at birth. None of the family members had such features. She had dental enamel anomaly and partial anodontia in the lower jaw. Sparse hair and partial alopecia (scalp, eyebrows and eyelashes) were recorded. Conclusion: Focal dermal hypoplasia is a congenital skin disease with a unique clinical feature. Thorough examination of the extremities is indicated for early proper genetic counseling and therapy.

Novel uses of laser therapy in Goltz syndrome.

Goltz syndrome is an X-linked dominant, multisystem birth defect due to PORCN mutation. The skin findings follow Blaschko's lines and often show epidermal atrophy and herniation of subcutaneous fatty tissue. Regarding treatment, light sources can offer a good therapeutic option for some manifestations of this rare disease and improve the aesthetic appearance of the skin lesions. We report two new cases of Goltz syndrome in which the cutaneous findings remarkably improved with pulsed dye laser and carbon dioxide laser.

Two new patients with focal dermal hypoplasia: A novel PORCN variant and insights on the diagnostic considerations.

Mutations in the PORCN gene cause an X-linked dominant condition; focal dermal hypoplasia (FDH), characterized by atrophic skin, pigmented skin lesions in addition to several ocular and skeletal malformations. FDH is rare with around 275 cases reported so far from diverse ethnic groups. Herein, we provide a report of two new patients with FDH from Egypt. In addition to the typical clinical manifestations of the disease, infrequently reported clinical findings in the form of broad metaphysis, bilateral short broad femurs, and dermal sinus over the sacrum were seen in Patient 1 and partial fusion of labia majora, ventral hernia, and bladder extrophy were present in Patient 2. Two heterozygous protein-truncating PORCN mutations were identified in our patients, a known nonsense c.370C>T p.(Arg124Ter) and a novel frameshift c.375delG p.(Ala126HisfsTer3). Segregation analyses confirmed that the two mutations were "de novo" and not inherited from any of the parents. Our study expands the clinical and mutational spectrum of focal dermal hypoplasia and emphasizes the importance of investigating the different body systems and organs for the early management of patients.

Implementation of high-resolution melting analysis of the porcupine (PORCN) gene for molecular diagnosis of focal dermal hypoplasia: Identification of a novel mutation.

BACKGROUND: Focal dermal hypoplasia (FDH) is rare X-linked dominant disease characterized by atrophy and linear pigmentation of the skin, split hand/foot deformities and ocular anomalies. FDH is caused by mutations of the Porcupine (PORCN) gene, which encodes an enzyme that catalyzes the palmitoylation of Wnt ligands required for their secretion. High resolution melting analysis (HRM) is a technique that allows rapid, labor-efficient, low-cost detection of genomic variants. In the present study, we report the successful implementation of HRM in the molecular diagnosis of FDH. METHODS: Polymerase chain reaction and HRM assays were designed and optimized for each of the coding exons of the PORCN gene, processing genomic DNA samples form a non-affected control and a patient complying with the FDH diagnostic criteria. The causal mutation was characterized by Sanger sequencing from an amplicon showing a HRM trace suggesting heterozygous variation and was validated using an amplification-refractory mutation system (ARMS) assay. RESULTS: The melting profiles suggested the presence of a variant in the patient within exon 1. Sanger sequencing revealed a previously unknown C to T transition replacing a glutamine codon for a premature stop codon at position 28, which was validated using ARMS. CONCLUSIONS: Next-generation sequencing facilitates the molecular diagnosis of monogenic disorders; however, its cost-benefit ratio is not optimal when a single, small or medium size causal gene is already identified and the clinical diagnostic presumption is strong. Under those conditions, as it is the case for FDH, HRM represents a cost- and labor-effective approach.

Microphthalmia and linear skin defects syndrome: Precise diagnosis guides prognosis.

Microphthalmia and linear skin defects syndrome (MLS) is a rare X-linked dominant disorder characterized by microphthalmia and linear atrophic plaques of the face and neck. The diagnosis of MLS can be challenging secondary to both its rarity and to clinical overlap with Goltz syndrome. Whereas the skin lesions of MLS are more likely to improve in appearance with age, the lesions of Goltz are typically persistent.

Rare and unusual case of familial focal dermal hypoplasia (Goltz syndrome) presenting to otolaryngology in the UK.

Goltz syndrome or focal dermal hypoplasia (FDH), is an X-linked dominant condition which predominantly involves the skin, limbs and eyes. In otolaryngology, FDH has been poorly described, but can result in increased symptoms of obstructive sleep apnoea requiring surgery. There have also been documented cases of mixed severe hearing loss secondary to congenital ossicular anomalies. More frequently, patients present to the ear-nose-throat clinic with symptoms of dysphagia, secondary to papillomatosis. A 36-year-old woman presented with pain, irritation and dysphagia with a known diagnosis of FDH. She was subsequently investigated with an oesophago-gastro-duodenoscopy, Barium Swallow and an MRI neck scan with contrast. Lymphoid hyperplasia was found on investigation and the patient underwent a panendoscopy with CO2 laser to the lesion with good clinical outcome. This case report highlights the need for multidisciplinary team involvement to ensure full consideration of management options.

Síndrome de Goltz o Hipoplasia dérmica focal / Goltz Syndrome or focal dermal hypoplasia

RESUMEN Introducción: El síndrome de Goltz o hipoplasia dérmica focal es una enfermedad genética rara del grupo de las displasias ectodérmicas con un mecanismo de herencia dominante ligado al cromosoma X. Objetivo: Describir las características clínicas del síndrome de Goltz, su diagnóstico y tratamiento. Presentación del caso: Paciente femenina de 4 años de edad diagnosticada con síndrome de Goltz. Se valora en equipo multidisciplinario con las especialidades de genética, cirugía maxilofacial, estomatología, dermatología, oftalmología, ortopedia y el servicio de otorrinolaringología. Conclusiones: El síndrome de Goltz se caracteriza principalmente por afectación cutánea; anomalías oculares, dentales, faciales y esqueléticas; afectación del aparato gastrointestinal, urinario, cardiovascular y sistema nervioso central con grado variable de severidad. Su diagnóstico es clínico. La atención interdisciplinaria es fundamental para el adecuado diagnóstico y tratamiento; su pronóstico depende del grado de afectación(AU)

ABSTRACT Introduction: Goltz syndrome also known as focal dermal hypoplasia is a rare genetic disease in the ectodermal dysplasia´s group and with a mechanism of dominant inheritance linked to the X chromosome. Objectives: To describe the clinical characteristics of the Goltz syndrome, its diagnosis and treatment. Case presentation: Case of a 4 year-old female patient diagnosed with Goltz syndrome. She was studied by a multidisciplinary team including Genetics, Maxillofacial Surgery, Stomatology, Dermatology, Ophthalmology, Orthopedics and ORL specialists. Conclusions: Goltz syndrome or focal dermal hypoplasia is mainly characterized by skin affectations; eyes, dental, skeletal, and face anomalies; gastrointestinal tract, urinary, cardiovascular and central nervous systems´ affections with varying degrees of severity. The diagnosis is clinical. A multidisciplinary approach is essential for a proper diagnosis and treatment; and prognosis depends on the grade of severity(AU)

Hipoplasia dérmica focal (síndrome de Goltz) / Focal dermal hypoplasia (Goltz syndrome)

Resumen: Introducción: La hipoplasia dérmica focal o síndrome de Goltz es una rara genodermatosis de herencia dominante ligada al X, que afecta al tejido proveniente de las placas del ectodermo y del mesodermo. El cuadro clínico se caracteriza por alteraciones cutáneas, oftálmicas, neurológicas, dentales, ungueales, bucales, de tejidos blandos y esqueléticas. El diagnóstico se realiza por los hallazgos clínicos en un individuo con alteraciones ectodérmicas y malformaciones características en las extremidades. El manejo es multidisciplinario y, al igual que el pronóstico, depende de las alteraciones específicas que presente cada paciente. Caso clínico: Se presenta el caso de un recién nacido de sexo femenino, de 15 días de vida, con zonas de alopecia en piel cabelluda, herniación de tejido celular subcutáneo en varias áreas de todos los segmentos corporales, escotadura en ala nasal, hendidura en encía superior, defecto grave de extremidad superior izquierda con rizomelia (acortamiento de segmento proximal) y aplasia de radio, así como ectrodactilia de miembro pélvico derecho. Todos los hallazgos son compatibles con hipoplasia dérmica focal de acuerdo con los criterios diagnósticos. Conclusiones: Se presenta el caso de una paciente recién nacida con síndrome de Goltz.

Abstract: Background: Focal dermal hypoplasia or Goltz syndrome is a rare X-linked dominant inherited genodermatosis, affecting both the ectodermal and mesodermal tissue. Clinical manifestations include skin abnormalities, defects in eyes, teeth, nails, mouth, soft tissues and skeleton. The diagnosis is based on clinical findings and is suspected in individuals with ectodermal abnormalities and characteristic malformations in the extremities. The management is multidisciplinary and, like the prognosis, depends on the specific alterations that each patient presents. Case report: We report the case of a 15-day-old female newborn with alopecic areas on the scalp, herniation of subcutaneous cellular tissue at the lumbar level, nasal wing notch, severe left superior limb defect with rhizomelia (proximal segment shortening) and radio aplasia, as well as right leg ectrodactyly, areas of atrophy compatible with focal dermal hypoplasia according to diagnostic criteria. Conclusions: We present a case of female newborn patient with Goltz syndrome.