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![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Neutrophils_-1.jpg/100px-Neutrophils_-1.jpg) |
Neutrophils |
Micrograph showing neutrophils in acute inflammation.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Margination_of_neutrophils.jpg/100px-Margination_of_neutrophils.jpg) |
Neutrophils |
Micrograph showing neutrophil margination and extravasation in acute inflammation.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Plasma_cells.jpg/100px-Plasma_cells.jpg) |
Plasma cells |
Plasma cell showing eccentrically placed round nucleus with cart wheel like chromatin.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Eosinophils_Low_Power_view.jpg/100px-Eosinophils_Low_Power_view.jpg) |
Eosinophils |
Micrograph showing low power view of Eosinophils.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Eosinophils_HP_view.jpg/100px-Eosinophils_HP_view.jpg) |
Eosinophils |
Micrograph showing high power view of Eosinophils. H&E stain.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg) |
Lymphocytes |
Micrograph showing lymphocytes in caseating granuloma.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Fibroblasts |
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Foam cells |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Hemosiderin_laden_macrophages_in_chronic_venous_congestion_of_lung_40X.jpg/100px-Hemosiderin_laden_macrophages_in_chronic_venous_congestion_of_lung_40X.jpg) |
Hemosiderin laden macrophages |
Lung showing congestion with plenty of alveolar macrophages containing phagocytosed brownish granular hemosiderin pigment.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Hemosiderin_laden_macrophages_in_chronic_venous_congestion_of_lung_4X.jpg/100px-Hemosiderin_laden_macrophages_in_chronic_venous_congestion_of_lung_4X.jpg) |
Hemosiderin laden macrophages |
Lung showing congestion with plenty of alveolar macrophages containing phagocytosed brownish granular hemosiderin pigment.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Langhan cells |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Foreign_body_engulfed_by_a_giant_cell.jpg/100px-Foreign_body_engulfed_by_a_giant_cell.jpg) |
Foreign body giant cells |
Micrograph showing a foreign body engulfed by a giant cell.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Granulation_tissue_High_Power.jpg/100px-Granulation_tissue_High_Power.jpg) |
Granulation tissue |
Micrograph showing proliferating capillaries, fibroblasts and acute inflammatory cells.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Granulation_tissue_low_power.jpg/100px-Granulation_tissue_low_power.jpg) |
Granulation tissue |
Micrograph showing proliferating capillaries, fibroblasts and acute inflammatory cells.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Foreign_body_granuloma_-2.jpg/100px-Foreign_body_granuloma_-2.jpg) |
Foreign body granuloma |
Granulomatous reaction to keratin characterized by foreign body giant cells and chronic inflammatory cells.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Foreign_body_granuloma_2.jpg/100px-Foreign_body_granuloma_2.jpg) |
Foreign body granuloma |
Granulomatous reaction to keratin characterized by foreign body giant cells and chronic inflammatory cells.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg) |
Tuberculous granuloma |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Tuberculous_lymph_node_with_caseating_granuloma_4X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_4X.jpg) |
Tuberculous granuloma |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Breast_tissue_showing_fat_necrosis_4X.jpg/100px-Breast_tissue_showing_fat_necrosis_4X.jpg) |
Fat necrosis |
Breast lump showing an area of fat necrosis showing shadowy outlines of necrotic adipocytes surrounded by an inflammatory reaction with cholesterol clefts.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/2/28/Breast_tissue_showing_fat_necrosis.jpg/100px-Breast_tissue_showing_fat_necrosis.jpg) |
Fat necrosis |
Breast lump showing an area of fat necrosis showing shadowy outlines of necrotic adipocytes surrounded by an inflammatory reaction with cholesterol clefts.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/4/48/Calcinosis_cutis.jpg/100px-Calcinosis_cutis.jpg) |
Calcinosis cutis |
Multiple amorphous basophilic calcium deposits in the dermis.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Hemochromatosis_Liver_40x.jpg/100px-Hemochromatosis_Liver_40x.jpg) |
Hemochromatosis liver |
Micrograph of hemochromatosis liver showing hepatocytes with coarse golden yellow granules of hemosiderin within the cytoplasm. These granules stain with Prussian blue stain.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Tuberculous_lymph_node_with_caseating_granuloma_4X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_4X.jpg) |
Caseous necrosis |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg) |
Caseous necrosis |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/4/46/Fatty_change_liver_-_Lipid_steatosis_10X.jpg/100px-Fatty_change_liver_-_Lipid_steatosis_10X.jpg) |
Fatty change in liver |
Hepatic parenchymal cell cytoplasm containing clear vacuoles containing fat of varying sizes, displacing the nucleus towards the periphery.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Fatty_change_liver_-_Lipid_steatosis_40X.jpg/100px-Fatty_change_liver_-_Lipid_steatosis_40X.jpg) |
Fatty change in liver |
Hepatic parenchymal cell cytoplasm containing clear vacuoles containing fat of varying sizes, displacing the nucleus towards the periphery.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/4/47/Cervical_Intraepithelial_Neoplasia_HSIL_20X.jpg/100px-Cervical_Intraepithelial_Neoplasia_HSIL_20X.jpg) |
Carcinoma in situ |
CIN-III (HSIL) showing diffuse severe atypia with loss of maturation involving full thickness of epithelium with intact basement membrane.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Cervical_Intraepithelial_neoplasia_LSIL_20X.jpg/100px-Cervical_Intraepithelial_neoplasia_LSIL_20X.jpg) |
Carcinoma in situ |
CIN-I (LSIL) showing koilocytic atypia and intact basement membrane.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Cervical_Intraepithelial_neoplasia_LSIL_40X.jpg/100px-Cervical_Intraepithelial_neoplasia_LSIL_40X.jpg) |
Carcinoma in situ |
CIN-I (Low Grade Squamous Intraepithelial Lesion-LSIL) showing koilocytic atypia and intact basement membrane.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Adenocarcinoma_fluid_cytology_smear_1.jpg/100px-Adenocarcinoma_fluid_cytology_smear_1.jpg) |
Fluid cytology smear |
High power view showing intracytoplasmic mucin within malignant cells(Papanicolaou, 400X)
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![](//upload.wikimedia.org/wikipedia/commons/thumb/d/de/Adenocarcinoma_fluid_cytology_smear.jpg/100px-Adenocarcinoma_fluid_cytology_smear.jpg) |
Fluid cytology smear |
Low power view showing malignant cells arranged in glandular pattern (Papanicolaou, 100X)
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Lymph node metastasis |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Fibroadenoma_10X.jpg/100px-Fibroadenoma_10X.jpg) |
Fibroadenoma breast |
A well circumscribed lesion showing proliferation of intralobular stroma compressing and distorting the epithelium.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Fibroadenoma_20X.jpg/100px-Fibroadenoma_20X.jpg) |
Fibroadenoma breast |
A well circumscribed lesion showing proliferation of intralobular stroma compressing and distorting the epithelium.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/1/11/Tumor_giant_cell.jpg/100px-Tumor_giant_cell.jpg) |
Tumor giant cell |
Malignant neoplasm showing marked anaplasia. Note the marked nuclear pleomorphism, bizarre cells and tumor giant cells.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Capillary hemangioma |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/6/69/Leprosy_-_Lepromatous_%28LL%29_10x.jpg/100px-Leprosy_-_Lepromatous_%28LL%29_10x.jpg) |
Lepromatous leprosy |
Skin biopsy showing epidermal atrophy and multiple dermal infiltrates.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Leprosy_-_Lepromatous_%28LL%29_40x.jpg/100px-Leprosy_-_Lepromatous_%28LL%29_40x.jpg) |
Lepromatous leprosy |
Infiltrate of foamy histiocytes with scarcity of lymphocytes in lepromatous leprosy.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c3/Leprosy_-_Lepromatous_%28LL%29_4x_-_1.jpg/100px-Leprosy_-_Lepromatous_%28LL%29_4x_-_1.jpg) |
Lepromatous leprosy |
Skin biopsy showing epidermal atrophy and multiple dermal infiltrates.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Leprosy_-_Lepromatous_%28LL%29_4x.jpg/100px-Leprosy_-_Lepromatous_%28LL%29_4x.jpg) |
Lepromatous leprosy |
Skin biopsy showing epidermal atrophy and multiple inflammatory dermal infiltrates.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Leprosy_-_Lepromatous_%28LL%29_Wade_Fite_stain.jpg/100px-Leprosy_-_Lepromatous_%28LL%29_Wade_Fite_stain.jpg) |
Lepromatous leprosy |
Modified AFB staining in a case of lepromatous leprosy showing numerous rod shaped acid fast bacilli.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Leprosy_-_Lepromatous_%28LL%29.jpg/100px-Leprosy_-_Lepromatous_%28LL%29.jpg) |
Lepromatous leprosy |
Infiltrate of foamy histiocytes with scarcity of lymphocytes in lepromatous leprosy.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/0/01/Leprosy_-_Lepromatous_leprosy_%28LL%29_10x.jpg/100px-Leprosy_-_Lepromatous_leprosy_%28LL%29_10x.jpg) |
Lepromatous leprosy |
Skin biopsy showing epidermal atrophy and multiple dermal infiltrates composed of mainly foamy macrophages.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Leprosy_-_Lepromatous_leprosy_%28LL%29_40x.jpg/100px-Leprosy_-_Lepromatous_leprosy_%28LL%29_40x.jpg) |
Lepromatous leprosy |
Infiltrate of foamy histiocytes with scarcity of lymphocytes in lepromatous leprosy.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/4/46/Leprosy_-_Lepromatous_leprosy_%28LL%29.jpg/100px-Leprosy_-_Lepromatous_leprosy_%28LL%29.jpg) |
Lepromatous leprosy |
Infiltrate of foamy histiocytes with scarcity of lymphocytes in lepromatous leprosy.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Grenz_zone_in_leprosy.jpg/100px-Grenz_zone_in_leprosy.jpg) |
Lepromatous leprosy |
Skin biopsy showing subepidermal Grenz zone.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Leprosy_-_Tuberculoid_%28TT%29_-_1.jpg/100px-Leprosy_-_Tuberculoid_%28TT%29_-_1.jpg) |
Tuberculoid leprosy |
Skin biopsy showing multiple peri-appendageal granulomas.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Leprosy_-_Tuberculoid_%28TT%29_-_2.jpg/100px-Leprosy_-_Tuberculoid_%28TT%29_-_2.jpg) |
Tuberculoid leprosy |
Granulomatous lesion with epithelioid cells, Langhans giant cells and prominent lymphocyte infiltrate.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/7/72/Leprosy_-_Tuberculoid_%28TT%29_-_4.jpg/100px-Leprosy_-_Tuberculoid_%28TT%29_-_4.jpg) |
Tuberculoid leprosy |
Granulomatous lesion with epithelioid cells, Langhans giant cells and prominent lymphocyte infiltrate.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Leprosy_-_Tuberculoid_%28TT%29_-_7.jpg/100px-Leprosy_-_Tuberculoid_%28TT%29_-_7.jpg) |
Tuberculoid leprosy |
Skin biopsy specimen showing multiple granulomas.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg) |
Tuberculous lymph node |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Tuberculous_lymph_node_with_caseating_granuloma_4X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_4X.jpg) |
Tuberculous lymph node |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Tuberculous intestine |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Helminth_in_appendix_20x.jpg/100px-Helminth_in_appendix_20x.jpg) |
Helminth in appendix |
Micrograph showing lumen of appendix and cut section of pin worm.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Chromoblastomycosis_40x.jpg/100px-Chromoblastomycosis_40x.jpg) |
Chromoblastomycosis |
Micrograph of chromoblastomycosis showing sclerotic bodies in dermis.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Amoebiasis_of_intestine_40x.jpg/100px-Amoebiasis_of_intestine_40x.jpg) |
Amoebiasis in intestine |
Colonic biopsy showing trophozoite of Entamoeba Histolytica with ingested red blood cells.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Amoebiasis_of_intestine%2C_20x.jpg/100px-Amoebiasis_of_intestine%2C_20x.jpg) |
Amoebiasis in intestine |
Colonic biopsy showing trophozoite of Entamoeba Histolytica with ingested red blood cells.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Rhinosporidiosis |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Filarial_lymphadenitis_10x_%281%29.jpg/100px-Filarial_lymphadenitis_10x_%281%29.jpg) |
Filarial lymphadenitis |
Micrograph showing section of an adult filarial worm. Surrounding tissue shows dense infiltration of eosinophils.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Reactive hyperplasia of lymph node |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg/100px-Tuberculous_lymph_node_with_caseating_granuloma_40X.jpg) |
Diffuse B-cell lymphoma |
Caseating granulomatous lesion with areas of amorphous granular eosinophilic necrotic debris known as caseation (on the right half) bordered by collections of epitheloid cells, Langhan giant cells and lymphocytes.
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![](//upload.wikimedia.org/wikipedia/commons/7/73/No_image.gif) |
Follicular lymphoma |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/2/21/Hodgkin%27s_lymphoma_with_RS_cell_10x.jpg/100px-Hodgkin%27s_lymphoma_with_RS_cell_10x.jpg) |
Hodgkin's lymphoma |
Micrograph of a lymph node in Hodgkin's lymphoma with the characteristic Reed-Sternberg cell. RS cell is a large cell with abundant amophophilic cytoplasm and binucleate mirror image nuclei. Each nucleus contains an acidophilic nucleolus surrounded by a halo.
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![](//upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Hodgkin%27s_lymphoma_with_sclerotic_body_40x.jpg/100px-Hodgkin%27s_lymphoma_with_sclerotic_body_40x.jpg) |
Hodgkin's lymphoma |
Micrograph of lymph node in Hodgkin's lymphoma showing small lymphocytes and scattered plasma cells in the background.
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