Plasmacytoma is a rare disease, which afflicts 2 to 3 people per every 100,000 of the general population. Solitary plasmacytoma accounts for 5% of the plasma cell neoplasm. Solitary plasmacytoma of the bone appears more vividly in the axial skeleton (25-60%), which has the red marrow and usually affects the thoracic vertebrae. We report a case of 54-year-old man who has a chest pain on the right side. After being treated for the muscle pain, his symptoms of pain were changed into weakness and allesthesia. We checked the MRI and found a mass lesion in the T5 vertebra, but there were no significant laboratory findings, in blood and urine samples. Finally, he got an operation due to the aggravation of the weakness. The result of biopsy indicated that it was a solitary plasmacytoma of the spine. After 5 months later, the weakness and allesthesia had disappeared.
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Thyroid carcinoma is the commonest endocrinological malignancy. After papillary thyroid carcinoma (PTC), follicular thyroid carcinoma (FTC) is the second most common histological subtype. Common presentations of FTC include a solitary thyroid nodule and cervical lymphadenopathy. The incidence of individuals diagnosed with thyroid cancer showing initially distant metastatic disease ranges from 1 to 9%. Also, the incidence of solitary bone metastasis from thyroid is only 2 to 3%. We report a case of a patient with FTC whose initial presentation was low back pain and right buttock pain due to vertebral metastasis rather than the usual neck lumps or symptoms of thyroid disease.
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