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The Results of Multiple Aspirations and Injections of Unicameral Bone Cyst by Methyl Prednisolone Acetate

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03724630
Recruitment Status : Unknown
Verified May 2018 by michael moured, Assiut University.
Recruitment status was:  Not yet recruiting
First Posted : October 30, 2018
Last Update Posted : October 30, 2018
Information provided by (Responsible Party):
michael moured, Assiut University

Brief Summary:
Evaluation of the efficacy of methyl prednisolone injection in treatment o f simple bone cyst to prevent all possible complications as pathological fractures and to avoid prolonged restriction of physical activity

Condition or disease
Simple Bone Cyst

Detailed Description:

unicameral bone cysts (UBCs) are benign, fluid-filled cavities that develop in tubular and flat bones (eg,humerus, femur). These cysts tend to expand and weaken the local bone,but they are not true neoplasms. In 1876, Virchow1 first described these lesions as cystic structures caused by abnormalities in local circulation.

UBCs are also known as simple or solitary bone cysts. They occur almost exclusively in children and adolescents (up to 85% of cases), with a reported peak between ages 3 and14 years and the average age at diagnosis being 9 years.

These lesions represent approximately 3% of all bone tumors and occur more commonly in boys than in girls (2:1). Several treatment options exist for unicameral bone cysts (UBCs), including observation, steroid injection, bone marrow injection, and Surgical procedures have ranged from simple curettage with autologous bone graft or allograft to sub periosteal resection with internal fixation and grafting

.Treatment by multiple injection of steroids produce minimal surgical approach, no hospital stay, and very low morbidity. Three or four injections over a period of 12 month may be enough

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Study Type : Observational
Estimated Enrollment : 15 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: The Results of Multiple Aspirations and Injections of Unicameral Bone Cyst by Methyl Prednisolone Acetate
Estimated Study Start Date : January 1, 2019
Estimated Primary Completion Date : January 1, 2020
Estimated Study Completion Date : March 1, 2020

Primary Outcome Measures :
  1. radiological healing of simple bone cyst [ Time Frame: one month after injection ]
    1. Modified Neer classification

      1. Healed cyst : Cyst filled by new bone, with or without small radiolucent area(s) < 1 cm in size
      2. Healing with defect: Radiolucent area(s) < 50% of the diameter of bone, with enough cortical thickness to prevent fracture
      3. Persistent cyst: Radiolucent area > 50% of diameter of the bone and with a thin cortical rim. No increase in the size of the cyst. Continued restriction of activity or repeated treatment is required
      4. Recurrent cyst: Cyst reappeared in a previously obliterated area, or a residual radiolucent area has increased in size
    2. the cyst index which predict the risk of pathological fracture .The cyst index can be calculated as the area of the cyst divided by the square of the diaphysis diameter cyst index equal to or greater than 3.5 indicates a high fracture risk

Secondary Outcome Measures :
  1. improvement of symptoms [ Time Frame: one month after injection ]
    clinical healing by asking the patient or his relevant about improvement of symptoms

Information from the National Library of Medicine

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Ages Eligible for Study:   up to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Sampling Method:   Non-Probability Sample
Study Population

Each patient will receive a maximum of three or four injections, with at least three months between injections. The indication for a second or third injection will be based on the surgeon's judgment regarding whether the cyst will be healed or not..

Injections will be performed with the patient under general anesthesia. Under image intensifier. The diagnosis of a unicameral bone cyst will be confirmed by needle aspiration of clear or straw-colored fluid.

  • Methylprednisolone acetate, 3 mg/cm3 of cyst volume with amaximum dose of 180 mg will be injected into the cyst .

If the cyst was multilocular, each cavity will be injected separately follow up of patients by radiological and clinical outcomes


Inclusion Criteria:

  • age .: all children eighteen years of age or younger with unicameral bone cyst
  • Patient with previous fracture on top of unicameral bone cyst

Exclusion Criteria:

  • patient age more than 18 years old
  • patients with malignant tumors
  • patients on chronic steroid treatment
  • pregnancy

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03724630

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Contact: michael M. gerges 01201885642

Sponsors and Collaborators
Assiut University

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Responsible Party: michael moured, principal investigator, Assiut University Identifier: NCT03724630    
Other Study ID Numbers: Assuit University 8000
First Posted: October 30, 2018    Key Record Dates
Last Update Posted: October 30, 2018
Last Verified: May 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Plan Description: radiological follow up of patients after one month of injection follow up again by x.ray after three months clinical outcome of patients after injection by visual analogue scale of pain

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Bone Cysts
Pathological Conditions, Anatomical
Bone Diseases
Musculoskeletal Diseases