Signs, Symptoms, and Growth Patterns Observed in GHSR Deficiency

Because GHSR deficiency is rare, much of what we know about the signs and symptoms comes from small research cohorts. Understanding the patterns observed in these studies can help you and your medical team monitor your child’s progress, but it is important to remember that these findings are not strict rules that every child will follow.

The Growth Curve Journey

In a key study of 26 children with pathogenic GHSR variants, researchers observed a common growth trajectory ^[1]. Most of these children began life at a typical size, with a normal birth length ^[1].

The shift usually happened in the first two years of life. This is the period where parents and doctors often notice downward crossing of the growth curve—meaning the child’s height percentile begins to drop below its original track ^[1]. (Note that downward crossing in the first two years can also happen for many non-pathologic reasons or other medical conditions).

By the time the children in this specific study were officially diagnosed, their average height was around -2.8 SDS (Standard Deviation Score), which is significantly below the average for their age ^[1].

While they are much shorter than their peers, their growth is proportionate. This means their limbs, torso, and head are all in typical proportion to each other, rather than having the shortened limbs seen in some other skeletal conditions ^[1].

Appetite, Weight, and Nutrition

Because the GHSR gene controls the receptor for ghrelin (often called the “hunger hormone”), it doesn’t just affect growth signaling—it can also affect how a child feels hunger ^[2][3].

• Low Appetite: Some children have a notably low interest in food or a very small appetite ^[1].
• Faltering Weight Gain: In the 26-child study, roughly 15% of the children experienced “failure to thrive” or faltering weight gain in infancy, where a child has difficulty gaining weight at the expected rate ^[1]. A small number may require temporary feeding support, such as a nasogastric tube.
• Normal BMI: Despite these early challenges, most children in the available series eventually maintained a normal BMI (Body Mass Index) for their small size ^[1].

When to seek help: Faltering weight gain is non-specific and is not automatically caused by low appetite. If you notice signs of inadequate intake, dehydration, or a drop in energy, you should contact your child’s clinician or a registered dietitian. Many children with GHSR variants do not have feeding problems, but those who do may benefit from specialized nutritional guidance.

Puberty and Long-Term Development

One of the most common questions parents ask is whether this condition will affect when their child enters puberty or if it will cause other health problems.

Pubertal Timing

Current evidence from limited cohorts suggests that pubertal timing is usually normal in children with GHSR deficiency ^[1]. The most recent case series found that most children entered puberty at the typical age for their sex ^[1][4].

Is it a “Syndrome”?

In genetics, a “syndrome” refers to a condition that affects many different parts of the body at once. GHSR deficiency is currently considered an isolated condition in most cases, meaning its primary effect is on height ^[5].

You may occasionally see case reports mentioning other issues, such as:

• Microcephaly (a smaller-than-average head size) ^[6].
• Developmental Delay ^[1].

While the scientific consensus is that these are not established core features of isolated GHSR-related short stature, they should not be ignored or simply assumed to be from prematurity. Any developmental, neurologic, or head-growth concern always warrants independent clinical evaluation to rule out a second condition ^[1][7].

Summary of Findings from Clinical Studies

The following table summarizes the typical findings based on a 26-child cohort study of children with this genetic variant ^[1]. Please note that these describe a small study population and cannot confirm or exclude the diagnosis in an individual child:

Understanding these signs can help you advocate for your child, but any deviation from this pattern requires clinical evaluation by your endocrinologist.