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بزرگنمایی
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Toxoplasma gondii
Toxoplasma gondii infection can result in the formation of pseudocysts, which have the infected cell forming the cyst wall, and the cysts contain bradyzoites. Pseudocysts are seen here in cerebrum in a microglial nodule
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بزرگنمایی
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normal right adrenal gland
A normal right adrenal gland is shown here positioned between the liver and the kidney in the retroperitoneum. Note the amount of adipose tissue, some of which has been reflected to reveal the upper pole of the kidney and the adrenal.
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بزرگنمایی
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collapse of the liver parenchyma
is trichrome stain demonstrates the collapse of the liver parenchyma with viral hepatitis. The blue-staining areas are the connective tissue of many portal tracts that have collapsed together
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بزرگنمایی
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MONOCYTE
Size of the cell: 15 - 25 mm
Shape of the cell: round, oval or irregular
Colour of cytoplasm: grey-blue
Granularity: absent or a few, azurophilic, very fine granules
Nucleus' shape: usually irregular
Type of chromatin: coarse chromatin, clumped
Nuclear/cytoplasmic ratio: moderate or low
Nucleoli: not visible
Occurrence:
blood: 4 - 8 %
marrow: < 2 %
Comment: Typical monocyte with abundant purple-blue cytoplasm containing small vacuoles. Staining: MGG
Magnification: x 1000
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بزرگنمایی
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MICROCYTE
Size of the cell: < 6 mm
Occurrence: in blood :< 10 % of erythrocytes in normal blood
Comment: In the picture the visible erythrocytes are microcytes and their diameters are much smaller than the diameters of the small lymphocyte (its diameter is 10-12 mm). The erythrocytes are hypochromic. Besides, normal platelets are present. Staining: MGG
Magnification: x 500
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بزرگنمایی
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ERYTHROBLASTS IN THE BLOOD
Definition: Cells with dark, condensed nucleus, morphology like in the bone marrow
Occurrence in blood: normally not present. Present only in the blood of newborn children.
Comment: An early polychromatophilic erythroblast is present in the blood. Also several ovalocytes and microcytes are present. Staining: MGG
Magnification: x 1000
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بزرگنمایی
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PAPPENHEIMER BODIES
Definition: Very fine dark separated or connected granules present in the cytoplasm of the erythrocyte, particularly often near the periphery of the red cell. Probably these are the equivalent to iron granules of siderocytes.
Occurrence in blood: a small number present in normal blood
Comment: Six erythrocytes contain Pappenheimer’s bodies. Also not much expressed anisocytosis of the erythrocytes and two target cells. Staining: MGG
Magnification: x 1000
1. Pappenheimer bodies 2. target-cell
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بزرگنمایی
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pituitary gland
The normal microscopic appearance of the pituitary gland is shown here. The adenohypophysis is at the right and the neurohypophysis is at the left.
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بزرگنمایی
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Hymenolepis nana worm 10x
Hymenolepis nana worm
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بزرگنمایی
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Gram stain of Escherichia coli
: Gram-negative rods with parallel sides and rounded ends
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بزرگنمایی
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residual adrenal & adrenal cortical carcinoma
There is residual adrenal at the right, and an adrenal cortical carcinoma is at the left.
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بزرگنمایی
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Sporotrichum schenckii 40x
Sporotrichum schenckii
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بزرگنمایی
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Histoplasma capsulatum
Histoplasma capsulatum is often a disseminated infection, and the macrophages containing small yeasts appear in multiple organs, particularly those of the mononuclear phagocyte system (lymph node, liver, spleen, marrow). Here the organisms are seen in liver with H and E stain
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بزرگنمایی
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Polarized Triple Phosphate Crystals
Polarized Triple Phosphate Crystals
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بزرگنمایی
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Normal Bone Marrow: PERIODIC-ACID SCHIFF (PAS) REACTION
Reaction product: red granules, where glycogen is present
Occurrence:
Neutrophils: positive diffuse reaction from the stage of promyelocyte (weak positive) to segmented forms (strong positive)
Basophils: numerous granules
Eosinophils: positive diffuse reaction in the cytoplasm
Monocytes: fine granules
Lymphocytes: negative reaction, granules are rarely present in normal lymphocytes
Erythroblasts: negative
Megakaryocytes: diffuse reaction or small granules in the cytoplasm
Staining: PAS method
Comment: Typical diffuse positve PAS reaction in three mature neutrophils (two segmented and one band neutrophil). Magnification: x 500
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بزرگنمایی
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Leiomyosarcoma
Here is the microscopic appearance of a leiomyosarcoma. It is much more cellular and the cells have much more pleomorphism and hyperchromatism than the benign leiomyoma. An irregular mitosis is seen in the center.
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بزرگنمایی
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Phase contrast of Fusobacterium necrophorum A
Long filamentous rods
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