Application of immunohistochemistry in pathological diagnosis of lymphoproliferative lesions / 白血病·淋巴瘤

The immunohistochemistry is an useful method for pathological diagnosis and differential diagnosis of lymphoproliferative lesions,but it must be used correctly and its immunophenotypic results should be evaluated. The following points should be paid attention: (1) Similar antibodies must be reasonable compatibility; (2) the pseudo-positive and pseudo-negative of immunophenotype must be distinguished; (3) the immunophenotypica site must be distinguished; (4) the specify of the antibody expression must be distinguished; (5) the immunophenotype in the tumor cells or reactive cells must be distinguished; (6) the immunophenotype must be used correctly in differential diagnosis between the benign and malignant of hyperplastic lymphoid tissues. The author emphasizes that immunohistochemical techniques need to be combined with other diagnostic features of lymphoproliferative lesions,in order to obtain satisfactory results.

Application of immunohistochemistry in pathological diagnosis of lymphoproliferative lesions / 白血病·淋巴瘤

The immunohistochemistry is an useful method for pathological diagnosis and differential diagnosis of lymphoproliferative lesions,but it must be used correctly and its immunophenotypic results should be evaluated. The following points should be paid attention: (1) Similar antibodies must be reasonable compatibility; (2) the pseudo-positive and pseudo-negative of immunophenotype must be distinguished; (3) the immunophenotypica site must be distinguished; (4) the specify of the antibody expression must be distinguished; (5) the immunophenotype in the tumor cells or reactive cells must be distinguished; (6) the immunophenotype must be used correctly in differential diagnosis between the benign and malignant of hyperplastic lymphoid tissues. The author emphasizes that immunohistochemical techniques need to be combined with other diagnostic features of lymphoproliferative lesions,in order to obtain satisfactory results.

Clonality assessment of lymphoproliferative lesions using the polymerase chain reaction: An analysis of two methods.

Background: Lymphoid malignancies are a heterogeneous group of disorders which may be difficult to differentiate from reactive proliferations even after immunohistochemistry. Polymerase chain reaction (PCR) is believed to be a good adjunct tool for diagnosis. Materials and Methods: We examined 24 cases of neoplastic and non-neoplastic lymphoproliferative lesions in this study and evaluated the PCR as an additional tool in the confirmation of the diagnosis. Two different PCR methodologies were evaluated. Results: In the evaluation of the T-cell PCR, it was seen that the correlation using both the commercial kits and the custom-synthesized primers was highly significant at a P value of <0.05. In the evaluation of the B-cell PCR, it was seen that the correlation using both the commercial kits and the custom-synthesized primers was not significant using either method (P > 0.05). Conclusions: Both the methods showed an excellent concordance for T-cell γ gene rearrangements, However, the same was not seen in the B-cell receptor rearrangements. This may be because of the small sample size or the inability of consensus V primers to recognize complementary DNA sequences in all of the V segments.

Clinical Features and Treatment Results of Conjunctival Lymphoproliferative Lesions

PURPOSE: To investigate the clinical features of conjunctival lymphoproliferative lesions and associated systemic lymphoma, and to determine the recurrence rate and prognosis according to treatment methods. METHODS: Eighteen patients with conjunctival lymphoproliferative lesions were followed up. We retrospectively analyzed data for clinical symptoms, anatomical location, histological type, associated systemic lymphoma, and treatment results. RESULTS: Conjunctival lymphoproliferative lesions were classified according to WHO classification: benign lymphoid hyperplasia in 7 patients, MALT-lymphoma in 7, and small B lymphocytic lymphoma in 4. Systemic lymphoma existed in 2 patients (11.1%). Remission was not achieved in one patients treated by surgical excision and chemotherapy. Complete remission was achieved in 5 patients with conjunctival malignant lymphoma treated by surgical excision, radiotherapy and chemotherapy. CONCLUSIONS: We consider that aggressive treatment using radiotherapy, chemotherapy and surgical excision in conjunctival malignant lymphoma is needful to achieve complete remission and prevent recurrence.