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PubMed This is a summary of 15 peer-reviewed journal articles Updated
Orthopedics

Recognizing Symptoms and Watching for Warning Signs

At a Glance

Ollier disease causes benign cartilage tumors (enchondromas) that can lead to uneven bone growth, bowing, and fractures. Patients must monitor for red flags like new resting pain or rapid lump growth, which may indicate a transformation into bone cancer (chondrosarcoma).

Symptoms of Ollier disease often first appear during the first decade of life [1][2]. Because the condition is asymmetric, the first thing many parents or patients notice is that one side of the body looks or moves differently than the other [2][3]. Understanding which symptoms are “typical” for the condition and which are “red flags” for more serious changes is essential for long-term management.

Common Orthopedic Symptoms

Most symptoms in Ollier disease are caused by enchondromas (benign cartilage tumors) interfering with normal bone growth [1]. These are not inherently dangerous but can cause physical challenges:

  • Limb Length Discrepancy (LLD): Because enchondromas affect the growth plates, one limb (usually a leg) may grow more slowly than the other, leading to a noticeable difference in length [1][4].
  • Angular Deformities: Bones may grow at an angle rather than straight. Common examples include genu valgum (knock-knees) or bowing of the forearms [1][5].
  • Pathological Fractures: Enchondromas can thin the outer layer of the bone, making it weaker. This can lead to a pathological fracture, where the bone breaks during a normal activity that wouldn’t typically cause injury [6][2]. These fractures generally heal well with standard orthopedic care [7].
  • Visible Bumps: You may see or feel firm, painless swelling, especially on the fingers, toes, or near the knees and wrists [2][8].

Clinical Red Flags

While most enchondromas remain benign, there is a lifetime risk (estimated between 5% and 50%) that a lesion may transform into chondrosarcoma, a type of bone cancer [9][10]. The exact risk varies depending on the extent and severity of the disease [2]. Because early detection is key, patients and caregivers should watch for these specific warning signs:

  1. New or Persistent Pain: Unlike the “mechanical” pain of a fracture or a limb length issue (which usually hurts only during movement), the pain of a malignancy often occurs at rest or wakes the patient up at night [2][10].
  2. Rapid Growth: A sudden increase in the size of a known bump, or a lump that grows noticeably over a few weeks or months, requires immediate medical evaluation [2][11].
  3. Changes After Growth Stops: In Ollier disease, enchondromas typically stop growing once a person reaches skeletal maturity (adulthood). Any new growth or pain in a bone after puberty is a significant red flag [1][9].

Monitoring for Safety

To catch changes early, doctors use a combination of physical exams and imaging:

  • Baseline Mapping: A baseline whole-body MRI is often recommended to identify the location of all existing lesions [10][12].
  • Serial X-rays: Doctors look for “cortical expansion” (thinning or bulging of the bone’s outer shell) or “hazy” margins (meaning the edges of the tumor are no longer sharp and clear) on X-rays, which can suggest a lesion is becoming more active [4][13].
  • Extra-skeletal Awareness: While extremely rare, the genetic mutations in Ollier disease are sometimes associated with tumors in other areas, such as the brain (gliomas) or ovaries. Patients should report any unusual neurological symptoms or abdominal changes to their specialist [14][15].

Common questions in this guide

What are the early signs of Ollier disease?
The earliest signs usually appear during the first decade of life as asymmetric bone growth. Parents or patients often notice that one side of the body looks or moves differently, such as one leg growing slower than the other, or firm, painless bumps near the joints.
How can I tell if an enchondroma is becoming cancerous?
Warning signs of a malignant transformation into chondrosarcoma include new or persistent pain, especially pain that occurs at rest or wakes you up at night. Rapid growth of a lump or any new bone changes after reaching adulthood also require immediate medical evaluation.
What is a pathological fracture in Ollier disease?
A pathological fracture happens when a bone breaks during a normal activity because it was thinned and weakened by a benign tumor. Fortunately, these fractures generally heal well with standard orthopedic treatments.
Why do doctors recommend a whole-body MRI for Ollier disease?
A baseline whole-body MRI is recommended to locate and map all existing bone lesions. This mapping is crucial for safely monitoring the condition over time and quickly spotting any harmful changes on future scans.
How do I distinguish between normal discomfort and cancer pain?
While normal growing pains or mechanical discomfort usually only hurt during movement, the pain associated with a malignancy is different. Malignant pain often persists when resting and can be severe enough to disrupt sleep.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Does the current bowing or limb length difference require surgical intervention now, or should we continue to monitor it?
  2. 2.How do we distinguish between growing pains or 'normal' discomfort and the red-flag pain of a malignancy?
  3. 3.Can we review the most recent X-rays together so I can understand what 'well-defined margins' look like in my/my child's bones?
  4. 4.What is the specific protocol for our clinic if we notice rapid growth in a lesion between scheduled appointments?
  5. 5.Are we monitoring for non-skeletal symptoms, such as those related to the brain or ovaries, based on current guidelines?

Questions For You

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References

References (15)
  1. 1

    An Extremely Rare Case of Ollier Disease With Calvarial Involvement.

    Önner H, Calderon Tobar MN, Perktas L

    Clinical nuclear medicine 2025; (50(12)):1186-1187 doi:10.1097/RLU.0000000000006108.

    PMID: 40829138
  2. 2

    Ollier Disease: A Case Series and Literature Review.

    Markevičiūtė V, Markevičiūtė MŠ, Stravinskas M

    Acta medica Lituanic 2021; (28(1)):181-188 doi:10.15388/Amed.2021.28.1.8.

    PMID: 34393643
  3. 3

    Ollier Disease: Pathogenesis, Diagnosis, and Management.

    Kumar A, Jain VK, Bharadwaj M, Arya RK

    Orthopedics 2015; (38(6)):e497-506 doi:10.3928/01477447-20150603-58.

    PMID: 26091223
  4. 4

    Severe Deforming Ollier Disease with a Giant Proximal Humeral Benign Chondroid Lesion in an Adolescent Male: Case Report.

    Prakash M, Siddhartha SA, Gurumurthy B, et al.

    Journal of orthopaedic case reports 2026; (16(7)):383-388 doi:10.13107/jocr.2026.v16.i07.7698.

    PMID: 42428399
  5. 5

    Multiple hereditary exostoses and enchondromatosis.

    Jurik AG

    Best practice & research. Clinical rheumatology 2020; (34(3)):101505 doi:10.1016/j.berh.2020.101505.

    PMID: 32253147
  6. 6

    Ollier Disease: A Case Report and Review of Treatment Options.

    Kramer HD, Valentine MJ, Pettinelli N, et al.

    Cureus 2023; (15(8)):e43815 doi:10.7759/cureus.43815.

    PMID: 37731444
  7. 7

    Multiple Enchondromas of the Hand in Children: Long-Term Follow-Up of Mean 15.4 Years.

    Kadar A, Kleinstern G, Morsy M, et al.

    Journal of pediatric orthopedics 2018; (38(10)):543-548 doi:10.1097/BPO.0000000000000869.

    PMID: 27603196
  8. 8

    Impact of Patient and Tumor Characteristics on Range of Motion and Recurrence Following Treatment of Enchondromas of the Hand.

    Wessel LE, Christ AB, Athanasian EA

    The Journal of hand surgery 2023; (48(5)):512.e1-512.e7 doi:10.1016/j.jhsa.2021.11.027.

    PMID: 35115192
  9. 9

    Ollier disease: two case reports and a review of the literature.

    Wang JP, Xu ZY, Bao ZQ, et al.

    American journal of translational research 2018; (10(11)):3818-3826.

    PMID: 30662632
  10. 10

    Update on Cancer Screening in Children with Syndromes of Bone Lesions, Hereditary Leiomyomatosis and Renal Cell Carcinoma Syndrome, and Other Rare Syndromes.

    Michaeli O, Kim SY, Mitchell SG, et al.

    Clinical cancer research : an official journal of the American Association for Cancer Research 2025; (31(3)):457-465 doi:10.1158/1078-0432.CCR-24-2171.

    PMID: 39601780
  11. 11

    Maffucci Syndrome. An Interesting Case and a Review of the Literature.

    Ngai C, Ding DY, Rapp TB

    Bulletin of the Hospital for Joint Disease (2013) 2015; (73(4)):282-5.

    PMID: 26630472
  12. 12

    Maffucci Syndrome with Clival Enchondroma in Nasopharynx: A Case Report.

    Velagapudi S, Alshammari SM, Velagapudi S

    Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India 2019; (71(Suppl 1)):652-656 doi:10.1007/s12070-018-1463-8.

    PMID: 31742037
  13. 13

    Differential Diagnosis of Cartilaginous Lesions of Bone.

    Suster D, Hung YP, Nielsen GP

    Archives of pathology & laboratory medicine 2020; (144(1)):71-82 doi:10.5858/arpa.2019-0441-RA.

    PMID: 31877083
  14. 14

    Diffuse midline glioma in Ollier disease: A case report and a brief review of the literature.

    Karabulut AK, Türk S, Tamsel İ, et al.

    Radiology case reports 2021; (16(8)):2299-2305 doi:10.1016/j.radcr.2021.05.046.

    PMID: 34194594
  15. 15

    Brain Gliomas and Ollier Disease: Molecular Findings as Predictive Risk Factors?

    Corvino S, Mariniello G, Corazzelli G, et al.

    Cancers 2022; (14(14)) doi:10.3390/cancers14143464.

    PMID: 35884525

This page is for informational purposes only and does not replace professional medical advice. Always consult your orthopedic specialist or oncologist immediately if you notice new pain, rapid growth, or other unexpected changes.

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