Non-Hodgkin's lymphoma of the prostate: a report of 2 cases and review of the literature / 中华男科学杂志

<p><b>OBJECTIVE</b>To study the clinicopathological characteristics of primary Non-Hodgkin's Lymphoma (NHL) of the prostate.</p><p><b>METHODS</b>Two cases of primary NHL of the prostate were studied by analyzing the clinical data, pathological features, prognosis and review of the literature.</p><p><b>RESULTS</b>HE showed that the normal prostatic tissues were replaced by diffuse-type cancer tissues composed of oval or round medium- to large- size lymphoid cells, with vesicular nuclei, fine chromatin, 2-4 membrane-bound nucleoli and scanty cytoplasm, with either amphophilic or basophilic. Immunohistochemistry revealed: CD20 +, CD79a +, CD10 -, CD5 -, CD3 - and CD45 - in Case 1 and CD20+ + +, PSA +/-, CKpan -, Syn -, CgA -, 34betaE12 -, P504S - and CD3 - in Case 2. Case 1 received chemotherapy combined with radiotherapy, relapsed 4 years later and stabilized by repeated chemotherapy. Case 2 experienced no recurrence after treated by chemotherapy.</p><p><b>CONCLUSION</b>Surgical treatment could be avoided by preoperative pathological diagnosis of primary NHL of the prostate, for which combined chemotherapy should be the first preference.</p>

A clinicopathologic study of dysembryoplstic neuroepithelial tumor / 中华病理学杂志

<p><b>UNLABELLED</b>OBJECTIVE To study the clinicopathologic features, radiologic findings, treatment modalities and prognosis of dysembryoplastic neuroepithelial tumor (DNT).</p><p><b>METHODS</b>The clinical features, histopathologic findings, immunohistochemistry and electron microscopy of 18 cases of DNT were analyzed. Results Among the 18 cases studied, 14 were males and 4 females. The age of these patients ranged from 3 to 46 (mean age = 22. 8 years). Partial seizure was the main presenting symptom in all patients. The history of epilepsy could be as long as 17 years. On magnetic resonance imaging (MRI) study, the tumor was hypodense on T1 and hyperdense on T2. There was neither edema nor mass effect. All but 2 cases were supratentorial and intracortical in location. Ten cases were treated by complete surgical excision and the remaining 8 tumors were partially excised. In the 14 patients with follow-up data available, 13 survived for 1.4 to 11 years after the operation (with more than 10 years survival observed in 2 patients). The average survival period was 5.5 years. None of the cases showed tumor recurrence after operation. Histologically, all tumors demonstrated a multinodular architecture and were intracortical in location, sometimes with extension into the white matter. The characteristic "glioneuronal constituent" was an essential feature for making the diagnosis of DNT. The tumor was formed by an admixture of oligodendrocyte-like cells, mature neurons and astrocytes, with obvious microcystic changes. These neurons were often dispersed singly in the mucoid matrix. In most cases, the foci of cortical dysplasia were found in adjacent areas. Immunohistochemical study demonstrated positivity for synaptophysin, neurofilament and S-100 protein in the neurons and some oligodendrocyte-like cells. The staining of glial fibrillary acidic protein in the oligodendrocyte-like cells was negative. Electron microscopy showed early neuronal, astrocytic and oligodendroglial differentiation of the oligodendrocyte-like cells.</p><p><b>CONCLUSIONS</b>DNT is a benign tumor (corresponding to WHO grade I) that can be cured by surgical excision, despite sometimes incomplete tumor removal. A correct diagnosis of this entity requires thorough understanding of the clinical, radiologic, histologic and immunohistochemical features.</p>