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Lymphadenopathy refers to abnormal changes in lymph nodes, which can result from various causes like infections or malignancies. Learn about the diagnostic process, characteristics of lymph nodes, and considerations for differentiating causes.
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LIMFADENOPATI IRZA WAHID SUBAGIAN HEMATOLOGI & ONKOLOGI MEDIK FK UNAND / RS DR M DJAMIL PADANG
Definition • Lymph nodes that are abnormal in size, consistency or number Generalized involvement of 3 or more noncontiguous lymph node areas. Localized
Non Burkitt’s Lymphoid generation Lymphocyte Lymphoplasmocytoid Plasma cell * AG INDEPENDENT DIFFRERENTIATION * STEM CELL / THYMUS * AG DEPENDENT DIFFRERENTIATION * NNLL, MALT
Lymph nodes are populated predominantly by • - macrophages, • - dendritic cells, • - B lymphocytes, and • - T lymphocytes. • B lymphocytes are located primarily in the follicles and perifollicular areas, • T lymphocytes are found primarily in the interfollicular or paracortical areas of the lymph node.
Lymphatic System • Network that filters antigens from the interstitial fluid • Primary site of immune response from tissue antigens • Lymphatic drainage in all organs of the body except brain, eyes, marrow and cartilage • 600 lymph nodes in body • Slow flow, low pressure system returns interstitial fluid to the blood system
Jar. LimfoidPerifer Nnlldan Malt
D I A G N O S I S • Anamnesis • history • age of the patient • The occurrence of fever, sweats, or weight loss • site of infection, a particular medication, atravel history. • Physical examination • Laboratoric test • Imaging studies to determine the extent and character of the lymphadenopathy • Histopatologic examination
In young childrenpalpable lymphadenopathy is the rule. who are continuously undergoing exposure to new antigens, • * In fact, the absence of palpable lymphadenopathy would be considered abnormal • * In adults, lymph nodes larger than 1 to 2 cm in diameter are generally considered abnormal. • * However, lymph nodes 1 to 2 cm in diameter in the groin are sufficiently frequent to often be considered "normal.“
more than two-thirds of patients with LAP have : • nonspecific causes or upper respiratory illnesses (viral or bacterial), • fewer than 1% have a malignancy • in another study :16% had a malignancy • (lymphoma or metastatic adenocarcinoma) • Thus, the vast majority of patients with lymphadenopathy will have a nonspecific etiology requiring few diagnostic tests.
Lymph node character • Site • Size • Consistency • Pain with palpation
Size • Greater than one centimeter generally considered abnormal • Exception inguinal area, lymph nodes commonly palpated (>1.5 cm) • Size does not indicate a specific disease process • Obese and thin population
Pain….. • Indication of rapid increase in size: stretch of capsular shell • NOT useful in determining benign vs malignant state • Inflammation, suppuration, hemorrhage
Consistency • Stone hard: typical of cancer usually metastatic • Firm rubbery: can suggest lymphoma • Soft: infection or inflammation • Suppurated nodes: fluctuant • Matting
Post cervical: scalp, neck skin of arms thorax cervical and axillary nodes (lymphoma, head/neck ca)
M I A M I MALIGNANT lymphoma, metastatic INFECTION acute, chronic AUTOIMMUNE DISEASE MISCELANOUS DISEASE UNNUSUAL IATROGENIC
Cancer • Hematologic malignancies: Hodgkins, NHL, acute and chronic leukemias, - multiple myeloma • Metastatic solid tumor * head & neck cancer * breast, lung, * gi tract, genitourinary tract cancer * cancer of unknown primary
I N F E C T I O N • Bacterial • Viral • Protozoan • Mycotic • Rickettsial (typhus) • Helminthic (filariasis)
Bacterial • Staph/strep: cutaneous source, lymphadenitis • Cat scratch: bartonellahensalae, two weeks after inoculation • Mycobacterium: TB and non-tb, host characteristics
VIRAL • EBV…mono spot test • CMV….cmv titers, immunsuppresed, transplant recipient, recent blood transfusion • HIV…IV drug use, high risk sexual behavior • Hepatitis….IV drug use • Herpes Zoster….superficial cutaneous nodules
Protozoan • Toxoplasmosis: ELISA assay, intracellular protozoan toxoplasmosis gondii….bilateral, symmetrical, non-tender cervical adenopathy …consider undercooked meat, reactivation in immuncompromised host