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Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

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Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
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Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
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B Cell Activation and Differentiation01:24

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Primary Splenic Diffuse Large B-cell Lymphoma: An Atypical Presentation.

Sarmad Pirzada1, Amana Hasnain1, Ali Abbas Mankani2

  • 1Internal Medicine, Trinity Health Livonia, Livonia, USA.

Cureus
|July 24, 2023
PubMed
Summary
This summary is machine-generated.

Primary splenic diffuse large B-cell lymphoma (PS-DLBCL) is a rare non-Hodgkin's lymphoma. This case highlights exclusive splenic involvement and successful treatment with R-CHOP chemotherapy without splenectomy.

Keywords:
diffuse large b-cell lymphomagi malignancyprimary splenic dlbclspleensplenectomy

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Area of Science:

  • Hematology
  • Oncology
  • Pathology

Background:

  • Primary splenic diffuse large B-cell lymphoma (PS-DLBCL) is an exceptionally rare non-Hodgkin's lymphoma.
  • It often presents with abdominal pain, a rapidly growing mass, and B symptoms.

Observation:

  • A 54-year-old woman presented with splenomegaly and an enlarged spleen (12 x 15 x 14 cm) with a hypodense lesion on CT scan.
  • Splenic core biopsy confirmed diffuse large B-cell lymphoma.
  • PET scan revealed a large, hypermetabolic, centrally necrotic splenic mass, with no other organ involvement, classifying the condition as stage I PS-DLBCL.

Findings:

  • The patient received four cycles of R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone) chemotherapy.
  • The case demonstrates a unique presentation of PS-DLBCL with isolated splenic involvement.

Implications:

  • This case suggests that R-CHOP chemotherapy, potentially combined with radiation therapy, may be an effective treatment for stage I PS-DLBCL.
  • It underscores the possibility of successful management without the necessity of splenectomy.