2026, Number 4
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Cir Columna 2026; 4 (4)
Intramedullary spinal metastasis: diagnostic and therapeutic challenges in a rare condition. A case report and literature review
De Paz-Jaimes O, Pérez-Carranza S, Aldape-Ocañas FG, Cortés-González PT, González-Gómez MA, Vázquez-Martínez BR
Language: Spanish
References: 17
Page: 334-343
PDF size: 1064.67 Kb.
ABSTRACT
Intramedullary spinal cord metastases (ISCM) are rare entities, representing approximately 8.5%
of central nervous system metastases. They occur in only 0.1-0.4% of cancer patients and account
for 1-3% of all intramedullary neoplasms. Lung cancer, particularly small cell carcinoma, is the most
frequent primary tumor leading to ISCM (54%), followed by breast cancer (13%). Other less common
sources include malignant melanoma, lymphoma, and colorectal cancer. Gastrointestinal tumors
rarely metastasize to the spinal cord, more commonly spreading to the liver, lymph nodes, bones,
and adrenal glands. Most ISCM cases are diagnosed in patients with a known history of cancer.
Diagnosis is primarily based on gadolinium-enhanced magnetic resonance imaging, with T2-weighted
sequences providing essential details on lesion location, morphology, and associated edema. Surgical
treatment has become a valid option in selected cases due to advances in imaging. It is indicated for
patients with a single, well-demarcated lesion, limited systemic metastases, progressive neurological
deterioration, and good functional status. The goals of surgery include spinal cord decompression,
neurological function preservation or improvement, and histopathological confirmation. Early resection
can improve both survival and quality of life, with postoperative survival averaging up to 11.6 months.
Encapsulated or cystic tumors favor complete resection, whereas leptomeningeal or infiltrative lesions
require partial resection to avoid irreversible neurological damage. Although radiotherapy remains the
standard treatment, surgical intervention is increasingly favored due to better functional outcomes
and symptom control. Treatment decisions should be individualized based on patient age, tumor
type, radiosensitivity, and the potential to enhance quality of life. This report of a patient with an
intramedullary metastasis at L1 whose initial symptom was recent-onset lumbosacral pain followed
by lower limb weakness (Karnofsky score: 80). Diagnosis was confirmed by gadolinium-enhanced
MRI, and surgical resection was performed. Histopathology revealed a metastatic lesion originating
from a gastrointestinal adenocarcinoma.
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