RESUMO
Neuroendocrine tumors may develop throughout the human body with the majority being found in the gastrointestinal tract and bronchopulmonary system. Neuroendocrine tumors are classified according to the grade of biological aggressiveness (G1–G3) and the extent of differentiation (welldifferentiated/ poorly-differentiated). The well-differentiated neoplasms comprise typical (G1) and atypical (G2) carcinoids. Large cell neuroendocrine carcinomas, as well as small cell carcinomas (G3), are poorly-differentiated. The identification and differentiation of atypical from typical carcinoids or large cell neuroendocrine carcinomas and small cell carcinomas are essential for treatment options and prognosis. Pulmonary neuroendocrine tumors are characterized according to the proportion of necrosis, the mitotic activity, palisading, rosette-like structure, trabecular pattern, and organoid nesting. These neuroendocrine tumors of the lung arise from Kulchitzky cells of the bronchial mucosa and comprise typical carcinoid, atypical carcinoid, large cell neuroendocrine carcinoma (LCNEC), and small cell lung cancer (SCLC). Here is a case report of the 75-year-old male patient presented with complaints of a cough and sudden onset of breathlessness and weight. On Computed Tomography (CT) a large heterogeneous lesion noted in the left anterior mediastinum which was subjected to CT guided biopsy. On histopathology and immunohistochemistry, the tumor was confirmed as small cell neuroendocrine tumor.
RESUMO
Background & Objectives: Out of total 328 antigens recognized by the International Society of Blood Transfusion (ISBT), ABO and RhD antigens are the most important from the transfusion medicine perspective. The present study was conducted with larger sample size than prior studies to determine frequencies of ABO and Rh alleles and obtain distribution of ABO and RhD blood group pattern among blood donors. Methods: A retrospective study was conducted in the Department of IHBT, Civil Hospital, Ahmedabad from October 2007 to September 2012. ABO grouping and RhD typing was done using conventional tube technique on a total of 109771 donors. Commercial anti-sera and in-house prepared cells were used for cell and serum grouping respectively in those tests. Departmental Standard Operating Procedures (SOPs) were followed for each aspect of testing. Observed ABO and RhD antigen frequencies were noted. Bernstein and Hardy-Weinberg equations were applied to determine the allele frequencies of ABO and RhD respectively. Results: Blood group B has the highest prevalence (35.81%) in the population under study followed by O (32.74%), A (22.68%) and AB (8.77%). Female donors comprised only 1.75% of the sample size. Rh D positivity was noted in 94.48% donors. Conclusion: Results obtained were quite similar to prior studies from Ahmedabad with smaller sample size. Remarkable differences were noted as compared with western population. The data generated in the present study combined with several other studies of different geographical region of India has significant implications in inventory management of blood transfusion services.