# Dislocation of joints at Keystone Center
> OSHA SIR `2022032553` · 3/22/2022 · CHESTER, PENNSYLVANIA
## Severity
- **1 hospitalization**
- **Body part:** Knee(s)
- **Nature of injury:** Dislocation of joints
## Cause
- **Event:** Climbing or stepping up or down-single episode
- **Source:** Bodily motion or position of injured, ill worker
- **Secondary source:** Stairs, steps, unspecified
## Employer
- **Name:** Keystone Center
- **Location:** 2001 Providence Avenue, CHESTER, PENNSYLVANIA, 19013
- **NAICS:** 621330
- **Jurisdiction:** 1
## Narrative

An employee was moving boxes down stairs. He dislocated his left knee on the last step.

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*Source: [OSHA Severe Injury Reports](https://www.osha.gov/severe-injury-reports) · MORVS · CC0 1.0*