Indications for appropriate referral to clinical genetics services - diagnosis of genetic syndromes

Overview

Referral to clinical genetics for diagnosis of a suspected genetic syndrome is appropriate when a clinical picture suggests an underlying genetic cause, and genetic diagnosis would inform management, prognosis, surveillance, or family counselling
Applies across the lifespan - congenital anomalies/dysmorphism in infancy, unexplained developmental delay/intellectual disability in childhood, and adult presentations suggestive of a late-onset genetic condition (inherited cardiomyopathy, hereditary cancer pattern, unexplained multisystem disease)

Clinical features prompting referral include: multiple congenital anomalies, dysmorphic features, unexplained developmental delay/intellectual disability, a suggestive family history (early-onset disease, multiple affected relatives, consanguinity), or a clinical pattern matching a recognised genetic syndrome

A thorough clinical assessment (detailed family history/pedigree, examination for dysmorphic features, relevant baseline investigations) before referral helps the genetics service target testing appropriately, rather than referring with minimal clinical information
Referral is appropriate even without a specific suspected diagnosis in mind - "unexplained syndrome, please assess" is a legitimate and common reason for referral given the breadth of the genetics differential

Genetics services can then apply structured diagnostic approaches (targeted gene panels, chromosome microarray, or broader exome/genome sequencing depending on the clinical picture) more efficiently than could be selected without specialist input
Early referral (rather than delayed, after extensive non-genetic workup) can shorten the overall diagnostic pathway ("diagnostic odyssey") for many patients with a genetic condition

Dysmorphology assessment, intellectual disability/developmental delay workup, inherited cardiac conditions, hereditary cancer syndromes

A genetic diagnosis, even without a disease-modifying treatment, frequently provides real value - explaining the cause, informing recurrence risk for family planning, guiding surveillance for known associated complications, and ending a prolonged, often distressing diagnostic search

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