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Zorluk: OrtaPediatric Hematology and Oncology

A 1212-year-old boy with a known history of Ewing sarcoma is brought to the emergency department due to worsening, severe back pain for the past 4848 hours. This morning, he developed weakness in both legs and has been unable to urinate. His temperature is 37.2∘C37.2^\circ\text{C} (99.0∘F99.0^\circ\text{F}), blood pressure is 112/70 mmHg112/70\text{ mmHg}, pulse is 98/min98\text{/min}, and respirations are 20/min20\text{/min}. Physical examination reveals 2/52/5 motor strength in the bilateral lower extremities, exaggerated deep tendon reflexes at the knees and ankles, and a loss of sensation to pinprick below the level of the umbilicus. Anal sphincter tone is markedly decreased. Arrange the following steps in the most appropriate chronological order for the management of this patient's current condition.

  1. 1Administer high-dose intravenous dexamethasone
  2. 2Obtain an urgent magnetic resonance imaging (MRI) of the entire spine
  3. 3Consult neurosurgery and radiation oncology specialists
  4. 4Perform definitive surgical decompression or emergent radiation therapy

Cevap

The correct sequence is to first administer high-dose intravenous dexamethasone, then obtain an urgent MRI of the entire spine, followed by consulting neurosurgery and radiation oncology specialists, and finally performing definitive surgical decompression or emergent radiation therapy.
The correct sequence prioritizes the immediate preservation of neurologic function over diagnostic confirmation. In malignant spinal cord compression, irreversible ischemia can occur rapidly. Therefore, corticosteroids must be given first to decrease edema. Only after this acute intervention is initiated should the patient be sent for an MRI to confirm the anatomy, followed by multidisciplinary specialist consultation and definitive decompression therapy.

Adım Adım Çözüm

1
Recognize malignant spinal cord compression (MSCC).
The patient's back pain, lower extremity weakness, sensory level, and bowel/bladder dysfunction in the setting of a known solid tumor (Ewing sarcoma) strongly indicate MSCC.
Establishing the clinical diagnosis dictates the immediate urgency of medical intervention.
2
Prioritize initial pharmacologic intervention.
Intravenous dexamethasone is administered first, prior to any imaging.
Glucocorticoids reduce vasogenic edema around the tumor, rapidly relieving pressure on the spinal cord and preventing irreversible neurologic damage. This critical step must be taken before the patient goes to the imaging suite.
3
Obtain confirmatory imaging.
An urgent MRI of the entire spine is performed.
MRI is required to anatomically confirm the diagnosis, identify the exact level of compression, and rule out multiple asymptomatic epidural metastases across the neuroaxis.
4
Plan and execute definitive therapy.
Specialists are consulted to proceed with surgery or targeted radiation.
Once the anatomy is visualized, multidisciplinary input ensures the correct modality is chosen to definitively relieve the compression based on tumor radiosensitivity and spinal stability.

Anahtar Kavram

In patients presenting with signs of malignant spinal cord compression and neurologic deficits, immediate administration of high-dose corticosteroids (e.g., dexamethasone) is the most critical first step to preserve neurologic function, and it must precede confirmatory imaging with an MRI.
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Pediatric Hematology and Oncology

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