Pathnologic @pathnologic
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Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
Simplex Virus Lymphadenitis ... Simplex #Virus #Lymphadenitis ... #HSV #Pathology ... #Microscopy #Clinical ... #LymphNode
Here is a lymph node that is lymphoid-depleted, fibrotic, and burned-out, typical of late phase HIV
late phase HIV lymphadenitis ... Pattern C" in HIV Lymphadenitis ... #PatternC #Pathology ... #Microscopy #LymphNode ... #Clinical
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Paracoccidioides brasiliensis Lymphadenitis ... #brasiliensis #Lymphadenitis ... #Pathology #LymphNode ... #Clinical #Microscopy
Borrelia recurrentis Infection - Spirochetes were visible (arrows), a finding that suggested louseborne relapsing fever #Clinical
relapsing fever #Clinical ... #Pathology #BorreliaRecurrentis ... #Recurrentis #Smear ... #Microscopy #NEJM
African Trypanosomiasis - The examination was notable for the two erythematous lesions, each measuring 3 to
peripheral-blood smear ... rhodesiense) (Panel B) #Clinical ... #Derm #Pathology ... #Smear #Microscopy ... TrypanosomaBrucei #NEJM
Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",
typical of HIV lymphadenitis ... Pattern A" in HIV Lymphadenitis ... #PatternA #Pathology ... #Microscopy #LymphNode ... #Clinical
Urinary Tract Tuberculosis - Contrast-enhanced computed tomography (CT) of the abdomen showed mild dilatation of the
bacilli (Panel D) #Clinical ... #Radiology #Pathology ... Tuberculosis #Pyuria #Smear ... AcidFastBacilli #Microscopy #NEJM
Peripheral-Blood Smear. A peripheral-blood smear (Wright’s stain) shows spherocytes (selectively indicated by arrows). #Clinical #Pathology #Spherocytosis
Peripheral-Blood Smear ... peripheral-blood smear ... #Clinical #Pathology ... HereditarySpherocytosis #NEJM
Squamous-Cell Carcinoma of the Tongue - Intraoral examination revealed a well-circumscribed superficial ulcer, with a homogeneous
Squamous-Cell Carcinoma ... squamous-cell carcinoma ... (Panel B) #Clinical ... #Pathology #Honc ... Squamous #Microscopy #NEJM
Grouped Pustules on an Erythematous Base - On physical examination, grouped, coalescing pustules that had scalloped
stain (Tzanck smear ... #Clinical #Derm ... #Pathology #Herpes ... Pustules #Tzsanck #Smear ... #Microscopy #NEJM