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PubMed This is a summary of 59 peer-reviewed journal articles Updated
Neurology

Understanding Your HSP Diagnosis

At a Glance

Hereditary spastic paraplegia (HSP) is a rare genetic condition causing progressive muscle stiffness and weakness in the legs. While there is no cure, it progresses very slowly. People with pure HSP usually have a normal life expectancy and manage symptoms through physical therapy.

Receiving a diagnosis of Hereditary Spastic Paraplegia (HSP) can be a moment of intense emotion. For some, it brings a wave of panic at the mention of a “neurodegenerative” condition. For others, it brings a profound sense of relief to finally have a name for symptoms that may have been dismissed or misunderstood for years [1]. Whatever you are feeling right now is a valid response to a complex diagnosis.

Three Stabilizing Facts

While HSP is a life-long condition, three key facts often help patients find their footing:

  1. Slow Progression: In most cases, HSP progresses very slowly and gradually over several decades, rather than months or years [1]. This slow pace often allows you and your care team time to adapt and plan.
  2. Normal Life Expectancy: For those with “pure” forms of HSP (where symptoms are limited to the legs), life expectancy is typically normal [2]. The disease affects how you move, but it does not generally affect your overall lifespan.
  3. Active Management: While there is currently no cure, there are many effective ways to manage symptoms [3]. Through physical therapy, medication, and specialized care, many people with HSP maintain their independence and mobility for a long time [4].

What is HSP?

HSP is not a single disease, but a group of rare genetic disorders that cause progressive spasticity (muscle stiffness) and weakness in the lower limbs [5][1].

To understand what is happening, imagine the long nerves that run from your brain down your spinal cord to your legs. These are called corticospinal tracts [6]. Because these are some of the longest nerves in the human body, they require a lot of energy and “maintenance” to stay healthy. In HSP, a genetic “hiccup” makes it difficult for these nerves to maintain their far ends (the parts closest to your legs). This leads to axonal degeneration—a process where the ends of the nerves slowly struggle and break down [7][6]. As these nerves struggle to send clear signals, your leg muscles become stiff and harder to control.

Why You May Have Faced a “Diagnostic Odyssey”

HSP is very rare, with a global prevalence estimated between 0.1 to 9.6 per 100,000 people [8][9]. Because it is so uncommon, many local doctors may have never treated a patient with HSP before. This rarity often leads to diagnostic delays, as symptoms can look like more common conditions such as cerebral palsy or multiple sclerosis [10].

A Highly Variable Journey

It is important to know that HSP is famous among doctors for its phenotypic variability—which is a medical way of saying that the disease looks different in everyone [1][11]. Even two people in the same family with the same genetic mutation can have very different symptoms and rates of progression [1]. Your journey with HSP will be unique to you, and your care plan should be just as personalized.

Navigating This Guide

To help you on your journey, we have broken down important topics into specific sections:

01

Recognizing Symptoms and Understanding Progression

Learn to recognize the early symptoms of Hereditary Spastic Paraplegia (HSP). Understand how pure and complicated HSP progress over time and signs to watch for.

02

The Biology and Genetics of Your Condition

Learn about the biology and genetics of Hereditary Spastic Paraplegia (HSP). Understand how gene mutations like SPAST affect nerves and cause symptoms.

03

HSP Subtypes: Pure vs. Complicated Forms

Learn the differences between pure and complicated Hereditary Spastic Paraplegia (HSP). Understand core symptoms, neurological effects, and care strategies.

04

Finding Answers: The Path to Diagnosis

Learn how Hereditary Spastic Paraplegia (HSP) is diagnosed. Understand the role of clinical exams, specific MRI clues like spinal atrophy, and genetic testing.

05

Building Your Treatment Plan: Managing Symptoms

Explore hereditary spastic paraplegia (HSP) treatment options. Learn how to manage spasticity and mobility with physical therapy, medications, and surgery.

06

Building Your Care Team and Preparing for Visits

Learn how to build a multidisciplinary care team for Hereditary Spastic Paraplegia (HSP). Discover which specialists you need and how to prepare for visits.

07

Living Well: Daily Management and Monitoring

Learn daily management strategies for Hereditary Spastic Paraplegia (HSP). Discover tips for fall prevention, energy conservation, and symptom monitoring.

Common questions in this guide

What is the difference between pure and complicated HSP?
Pure HSP primarily causes symptoms limited to muscle stiffness and weakness in the legs. Complicated forms of HSP involve these leg symptoms along with additional neurological issues that affect other parts of the body.
Does hereditary spastic paraplegia affect life expectancy?
For individuals with pure forms of HSP, life expectancy is generally normal. The condition affects movement and mobility over time but does not typically shorten a person's lifespan.
How fast does HSP progress?
In most people, hereditary spastic paraplegia progresses very slowly over the course of several decades. This gradual change often gives patients and their healthcare team time to adjust and manage symptoms effectively.
Why does HSP cause stiffness in my legs?
HSP affects the corticospinal tracts, which are the long nerves connecting your brain to your legs. A genetic issue causes the ends of these nerves to break down, leading to poor signal transmission that results in muscle stiffness and weakness.
Why did it take so long to get my HSP diagnosis?
HSP is a very rare condition, meaning many local doctors may have never treated a case before. Its symptoms often mimic more common neurological conditions like multiple sclerosis or cerebral palsy, which frequently causes delays in getting a correct diagnosis.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Do I have the 'pure' or 'complicated' form of HSP?
  2. 2.Has a specific genetic subtype, like SPG4, been identified in my case?
  3. 3.How many patients with HSP have you or this clinic treated before?
  4. 4.Are there local physical therapists who specialize in neurodegenerative gait issues?
  5. 5.What symptoms should I monitor for that might indicate the condition is becoming 'complicated'?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (11)
  1. 1

    Cognitive dysfunction in hereditary spastic paraplegias and other motor neuron disorders.

    Faber I, Branco LMT, França Júnior MC

    Dementia & neuropsychologia 2016; (10(4)):276-279 doi:10.1590/s1980-5764-2016dn1004004.

    PMID: 29213469
  2. 2

    A novel CPT1C variant causes pure hereditary spastic paraplegia with benign clinical course.

    Hong D, Cong L, Zhong S, et al.

    Annals of clinical and translational neurology 2019; (6(3)):610-614 doi:10.1002/acn3.717.

    PMID: 30911584
  3. 3

    Practical recommendations for the clinical evaluation of patients with hereditary ataxia and hereditary spastic paraplegia.

    Arpa Gutiérrez FJ, Abenza Abildúa MJ, Rouco Axpe I, et al.

    Neurologia 2024; (39(6)):515-522 doi:10.1016/j.nrleng.2022.02.002.

    PMID: 36396094
  4. 4

    Pathophysiology, diagnostic work-up and management of balance impairments and falls in patients with hereditary spastic paraplegia.

    Nonnekes J, van Lith B, van de Warrenburg BP, et al.

    Journal of rehabilitation medicine 2017; (49(5)):369-377 doi:10.2340/16501977-2227.

    PMID: 28471471
  5. 5

    Genetic and phenotypic characterization of complex hereditary spastic paraplegia.

    Kara E, Tucci A, Manzoni C, et al.

    Brain : a journal of neurology 2016; (139(Pt 7)):1904-18 doi:10.1093/brain/aww111.

    PMID: 27217339
  6. 6

    Ascending Axonal Degeneration of the Corticospinal Tract in Pure Hereditary Spastic Paraplegia: A Cross-Sectional DTI Study.

    List J, Kohl Z, Winkler J, et al.

    Brain sciences 2019; (9(10)) doi:10.3390/brainsci9100268.

    PMID: 31601037
  7. 7

    Defects in ER-endosome contacts impact lysosome function in hereditary spastic paraplegia.

    Allison R, Edgar JR, Pearson G, et al.

    The Journal of cell biology 2017; (216(5)):1337-1355 doi:10.1083/jcb.201609033.

    PMID: 28389476
  8. 8

    Hereditary Spastic Paraplegia: An Update.

    Meyyazhagan A, Orlacchio A

    International journal of molecular sciences 2022; (23(3)) doi:10.3390/ijms23031697.

    PMID: 35163618
  9. 9

    Hereditary Spastic Paraplegia Type 11-Clinical, Genetic and Neuroimaging Characteristics.

    Chojdak-Łukasiewicz J, Sulima K, Zimny A, et al.

    International journal of molecular sciences 2023; (24(24)) doi:10.3390/ijms242417530.

    PMID: 38139357
  10. 10

    Childhood-onset hereditary spastic paraplegia and its treatable mimics.

    Ebrahimi-Fakhari D, Saffari A, Pearl PL

    Molecular genetics and metabolism 2022; (137(4)):436-444 doi:10.1016/j.ymgme.2021.06.006.

    PMID: 34183250
  11. 11

    Research on clinical and molecular genetics of hereditary spastic paraplegia 11 patients in China.

    DU J

    Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences 2022; (47(12)):1729-1732 doi:10.11817/j.issn.1672-7347.2022.190651.

    PMID: 36748384

This page provides an educational overview of Hereditary Spastic Paraplegia (HSP). It is not a substitute for professional medical advice, diagnosis, or treatment from your neurologist or care team.

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