lymphadenitis

Digital case

 HPC:154 : Mycobacterial adenitis
 HPC:290 : nodal histiocytic infiltration in Rosai-Dorfman disease
 HPC:291 : rheumatoid adenitis
 HPC:293 : cat scratch disease
 HPC:295 : nodal toxoplasmosis
 HPC:332 : HIV-associated follicular lymphoid hyperplasia
 HPC:339 : Kikuchi adenitis (necrotizing histiocytic lymphadenitis)

Definition: Adenitis is a general term for an inflammation of a lymph node .

Types - lesional syndromes

 acute adenitis
 chronic adenitis

• granulomatous adenitis
  • tuberculoid granulomatous adenitis

 necrotizing adenitis

• Kikuchi-Fujimoto adenitis
• lupic adenitis

Localization

 cervical adenitis

• Cervical adenitis is an inflammation of a lymph node in the neck.

 mesenteric adenitis

• Mesenteric adenitis is an inflammation of the mesenteric lymph nodes in the abdomen.
• If it occurs in the right lower quadrant, it can be mistaken for acute appendicitis.

Etiology

 infectious adenitis

• viral adenitis
• bacterial adenitis
• fungal adenitis
• parasitic adenitis

 dysimmune adenitis