The already increasing use of telemedicine in the last few years has risen significantly after the onset of the COVID-19 pandemic. With a fast implementation, it is important to understand the experience of genetic counselling patients using telehealth. To this end, we developed a study to understand the impact of the pandemic on genetics consultations, using a mixed-method approach through a questionnaire to collect the patients’ opinions. The largest group included in the study was 26–45 years old (65%), and 33.6% had completed year 12 of secondary education. Due to the impact of the pandemic, we observed an increase of 84.5% in teleconsultations. The participants’ satisfaction was quite significant, 67.3% felt comfortable discussing personal and family health, 53.6% were well-enlightened, and 59.1% did not find it difficult to build a doctor-patient relationship. However, 64.5% of our participants indicated using the service only for subsequent consultations but supported the idea of continuing with telemedicine in the future. Undoubtedly, this service is essential for better quality and healthcare support. The professionals involved must be increasingly trained to provide adequate genetic counselling and comfort to the patient. Training automatically influences the improvement of the service regarding the barriers encountered and consequently provides a better experience and satisfaction to the patient and their families.

We describe an infant female with a syndromic neurodevelopmental clinical phenotype and increased chromosome instability as cellular phenotype. Genotype characterization revealed heterozygous variants in genes directly or indirectly linked to DNA repair: a de novo X-linked HDAC8 pathogenic variant, a paternally inherited FANCG pathogenic variant and a maternally inherited BRCA2 variant of uncertain significance. The full spectrum of the phenotype cannot be explained by any of the heterozygous variants on their own; thus, a synergic contribution is proposed. Complementation studies showed that the FANCG gene from the Fanconi Anaemia/BRCA (FA/BRCA) DNA repair pathway was impaired, indicating that the variant in FANCG contributes to the cellular phenotype. The patient’s chromosome instability represents the first report where heterozygous variant(s) in the FA/BRCA pathway are implicated in the cellular phenotype. We propose that a multigenic contribution of heterozygous variants in HDAC8 and the FA/BRCA pathway might have a role in the phenotype of this neurodevelopmental disorder. The importance of these findings may have repercussion in the clinical management of other cases with a similar synergic contribution of heterozygous variants, allowing the establishment of new genotype–phenotype correlations and motivating the biochemical study of the underlying mechanisms.

The chromosomal region 17p13.3 contains extensive repetitive sequences and is a well-recognized region of genomic instability. The 17p13.3 microduplication syndrome has been associated with a clinical spectrum of moderately non-specific phenotypes, including global developmental delay/intellectual disability, behavioral disorders, autism spectrum disorder and variable dysmorphic features. Depending on the genes involved in the microduplication, it can be categorized in two subtypes with different phenotypes. Here, we report a case of a 7-year-old boy with global developmental delay, speech impairment, hypotonia, behavioral conditions (ADHD and ODD), non-specific dysmorphic features and overgrowth. Genetic testing revealed a small 17p13.3 chromosomal duplication, which included the BHLHA9, CRK and YWHAE genes. Additionally, we observed that this was maternally inherited, and that the mother presented with a milder phenotype including mild learning disabilities, speech impairment and non-specific dysmorphic features, which did not significantly affect her. In conclusion, we present a clinical case of a 17p13.3 duplication that further delineates the clinical spectrum of this syndrome, including its intrafamilial/intergenerational variability.

The genetic complexity of neurodevelopmental disorders (NDD), combined with a heterogeneous clinical presentation, makes accurate assessment of their molecular bases and pathogenic mechanisms challenging. Our purpose is to reveal the pathogenic variant underlying a complex NDD through identification of the “full” spectrum of structural genomic and genetic variants. Therefore, clinical phenotyping and identification of variants by genome and exome sequencing, together with comprehensive assessment of these and affected candidate genes, were carried out. A maternally-inherited familial translocation [t(17;19)(p13.1;p13.3)mat] disrupting the GSG1 like 2 gene (GSG1L2), a 3.2 Mb dup(2)(q14.3q21.1) encompassing the autosomal dominant OMIM phenotype-associated PROC and HS6ST1 gene, and a novel frameshift c.4442del, p.(Gly1481Valfs*21) variant within exon 30 of the Chromodomain helicase DNA binding protein 4 (CHD4) have been identified. Considering the pathogenic potential of each variant and the proband’s phenotype, we conclude that this case basically fits the Sifrim–Hitz–Weiss syndrome or CHD4-associated neurodevelopmental phenotype. Finally, our data highlight the need for identification of the “full” spectrum of structural genomic and genetic variants and of reverse comparative phenotyping, including unrelated patients with variants in same genes, for improved genomic healthcare of patients with NDD.

Juvenile idiopathic arthritis (JIA) represents the most common cause of chronic arthritis in childhood; however, not all early-onset arthropathies are inflammatory in origin. We report the case of a 4-year-old girl initially diagnosed with oligoarticular JIA and treated with methotrexate followed by a tumor necrosis factor inhibitor, without significant clinical improvement and despite persistently normal inflammatory markers. Clinical reassessment raised suspicion of a non-inflammatory arthropathy, supported by characteristic radiographic findings including metaphyseal flaring of the distal femora and proximal tibiae. Genetic analysis identified compound heterozygous pathogenic variants in the PRG4 gene, confirming the diagnosis of camptodactyly–arthropathy–coxa vara–pericarditis (CACP) syndrome (OMIM #208250). PRG4 encodes lubricin, a mucin-like glycoprotein essential for boundary lubrication of articular cartilage and maintenance of synovial joint homeostasis. Loss-of-function variants disrupt joint lubrication, leading to mechanical synovial hyperplasia and chronic non-inflammatory joint effusion. This case highlights common diagnostic pitfalls in pediatric rheumatology and underscores the importance of considering genetic causes of chronic arthropathy when clinical and laboratory features are atypical for inflammatory disease. Early molecular diagnosis prevents unnecessary immunosuppressive therapy and enables appropriate multidisciplinary management.

Background: TP53 germline variant carrier families suffer from Li-Fraumeni syndrome (LFS) or heritable TP53-related cancer (hTP53rc) and are predisposed to multiple cancers across life. We analysed TP53-associated clinical, phenotypic, molecular, and geographical factors in TP53 carrier families managed in Portugal, comparing to eight nationwide cohorts, to understand disease specificities and improve local clinical care. Methods: We compared retrospective data from 223 individuals from 95 germline TP53 pathogenic/likely pathogenic variant (PV/LPV) carrier families, followed in 11 Portuguese hospitals (2001-2025), with eight published nationwide cohorts. Associations, including genotype-phenotype, were evaluated using rank-based, categorical tests, and Cramér's V. Findings: Ninety-five families carried 50 distinct germline TP53 PV/LPV, encompassing 223 patients that developed 307 cancers (multiple cancer rate 28%), with 34 years of median-age for first cancer. The predominant variant, c.1010G>A p.(R337H), occurred in 16% of families. Breast cancer (34%, median-age 35, IQR=30-42), sarcomas (16%, median-age 21, IQR=12-44), and central nervous system (CNS) tumours (11%, median-age 18, IQR=3-25) were the predominant (core-)cancers. Rather than core adrenocortical cancer (ACC-3%), stomach carcinoma (7%, median-age 44, IQR=36-53) ranked fifth. CNS tumours were associated with c.586C>T, colorectal carcinoma with c.388C>T, and ACC with the c.1010G>A. Although 58% families fulfil hTP53rc criteria, 42% lacked suggestive TP53-related predisposition, at referral, displaying mainly early-onset cancers. Interpretation: This TP53 genotype-first Portuguese study, benchmarked against other nationwide cohorts, identifies country-specific features: predominance of the Brazilian founder R337H variant, frequent “population-opportunistic” early-onset non-core carcinomas, variant-related organ tropism, and frequent TP53-positive results in families lacking clinical criteria, claiming for region-adapted testing guidelines and clinical management.