Utility of Ki-67, CD10, CD34, p53, CD117, and mast cell content in the differential diagnosis of cellular fibroadenomas and in the classification of phyllodes tumors of the breast.

Adequate management of phyllodes tumors of the breast (PTB) remains a challenge because of the difficulty in correctly establishing preoperative diagnosis. The aim of this study was to evaluate the usefulness of Ki-67, CD10, CD34, p53, CD117, and of the number of mast cells in the differential diagnosis of benign PTB and cellular fibroadenomas (CFs) as well as in the grading of PTB. Fifty-one primary PTB and 14 CFs were examined by immunohistochemistry.When evaluating CD117 expression, higher epithelial expression was present in CF as well as an increased number of mast cells in benign PTB. Stromal expression of Ki-67, CD10, CD34, and p53 were relevant to PTB grading, of which the first 3 showed significance in the distinction of benign and borderline PTB, as well as between benign and malignant PTB. P53 was relevant only for the discrimination between benign and malign PTB. None of the markers showed significance in distinguishing between borderline and malign PTB.

Lipossarcoma primário ósseo da coluna lombar: relato de caso / Primary liposarcoma of the lumbar spine: case report

Relatamos um caso raro de lipossarcoma primário ósseo da coluna lombar, do qual encontramos apenas um relato semelhante na literatura. Paciente do sexo feminino, 60 anos de idade, com clínica de lombociatalgia à esquerda há aproximadamente seis meses. Nos exames de imagem foi encontrado um tumor destrutivo do corpo vertebral de L4 e a ressonância nuclear magnética (RNM) revelou uma lesão tumoral com hipossinal em T1 e hipersinal em T2. O diagnóstico histológico foi difícil e a imuno-histoquímica confirmou o diagnóstico. O tratamento cirúrgico foi realizado com ressecção ampla, descompressão da medula espinhal, fusão anterior e posterior de L3 a L5, complementada pela radioterapia e quimioterapia. Após três anos, uma tomografia computadorizada (TC) evidenciou lesão expansiva no pulmão. Apesar de sua raridade, o lipossarcoma deve ser considerado no diagnóstico diferencial de ciatalgia e dos tumores primários da coluna vertebral.

We report a rare case of primary bone liposarcoma of the lumbar spine, for which only one case has been reported. A female patient, 60 years of age, with lumbar pain and left sciatalgy for six months. In the imaging exams, a destructive tumor was found in the L4 vertebral body, and magnetic resonance imaging (MRI) revealed a tumoral lesion with T1 hiposignal and T2 hypersignal. Histological diagnosis was difficult, and immunohistochemistry confirmed the diagnosis. Surgical treatment was performed with wide ressection, spinal cord decompression, and anterior and posterior fusion of L3 to L5 complemented by radiotherapy and chemotherapy. After three years, a computed tomography (CT) scan evidenced an expansive injury in the lung. Despite its rarity, liposarcoma should be considered in the differential diagnosis of sciatica and primary tumors of the spine.

PRIMARY LIPOSARCOMA OF THE LUMBAR SPINE: CASE REPORT.

We report a rare case of primary bone liposarcoma of the lumbar spine, for which only one case has been reported. A female patient, 60 years of age, with lumbar pain and left sciatalgy for six months. In the imaging exams, a destructive tumor was found in the L4 vertebral body, and magnetic resonance imaging (MRI) revealed a tumoral lesion with T1 hiposignal and T2 hypersignal. Histological diagnosis was difficult, and immunohistochemistry confirmed the diagnosis. Surgical treatment was performed with wide ressection, spinal cord decompression, and anterior and posterior fusion of L3 to L5 complemented by radiotherapy and chemotherapy. After three years, a computed tomography (CT) scan evidenced an expansive injury in the lung. Despite its rarity, liposarcoma should be considered in the differential diagnosis of sciatica and primary tumors of the spine.