Linfoma de células grandes B originado en enfermedad de Castleman: reporte de un caso y revisión de la literatura / Large B-cell lymphoma coexisting with Castleman's disease: report of one case

We report a 73-year-old female patient with Castleman's disease coexistent with large B cell type non-Hodgkin's lymphoma in a right axillary lymphadenopathy. An excisional biopsy was performed: microscopically, the lymph node revealed the presence of numerous plasma cells and small lymphoid cells characteristic of Castleman's disease. An analysis of another portion of the specimen revealed lymphoid cells with large abnormal nuclei gathered locally that were CDD 79+, CD 38+ and MUM-1+ as well as positive for Kaposi sarcoma-associated herpesvirus and negative for Epstein Barr virus encoded RNA-1 (EBER).

Recomendaciones para el procesamiento de especímenes en patología ósea. Experiencia del Instituto Nacional de Cancerología de Colombia / Recommendations for processing bone specimens in pathology: practice at the National Cancer Institute of Colombia

El procesamiento y estudio de la patología ósea es un reto diario para el patólogo debido a su complejidad diagnóstica. Las muestras con componente óseos requieren procedimientos como la manipulación de grandes piezas quirúrgicas y su descalcificación para obtener tejidos evaluables al microscopio. Lo anterior retarda el reporte patológico 20 a 30 días demorando el diagnóstico definitivo y el inicio de tratamiento o la evaluación de la respuesta a terapias neoadyudantes. Se desarrolló una guía de procesamiento de especímenes óseos que reduce los tiempos hasta el diagnóstico definitivo en 2 a 3 días para biopsias y en 13 a 15 días para amputaciones y resecciones en bloque. Presentamos una guía práctica, rápida y reproducible.

The processing and study of bone biopsias represent a challenge for the pathologist due to the complexity of diagnosis. Bone samples require special processing such as the manipulation and decalcification of big surgical specimens in order to obtain evaluable tissue under the microscope. Consequently, the pathology is performed in about 20-30 days delaying the final diagnosis, the beginning of treatment, or the evaluation of neoadyuvant therapy response. A practical guideline for bone specimen processing was developed reducing layout time for final diagnosis around 2-3 days for biopsies and 13-15 days for surgical specimens. A practical, nimble, and reliable guideline is presented.