What this covers
The mucopolysaccharidoses (MPS) are a group of related but varied inherited disorders, and their milder, attenuated forms are especially hard to spot and are often diagnosed late. This paper describes the natural history of attenuated MPS and the clinical signs that should raise suspicion, so that patients can benefit from earlier treatment. It also proposes a simple medical history form to help gather the right information.
Key takeaways
- People with attenuated MPS are usually cognitively normal and may have only mild or absent facial changes, which makes the condition easy to miss.
- The organs most often affected are the bones and joints, the heart and the eyes, with hepatosplenomegaly, hearing loss and respiratory problems also possible.
- Because patients are usually referred for a single main complaint, other important signs are easily overlooked — so a structured history form can help bring them together.
Why it matters
Attenuated MPS can respond well to earlier treatment, so recognising the wider cluster of signs and symptoms can shorten the long delays these patients often face.


