Granulation tissue

Actinomycosis

TB lung

Acute appendicitis

Foam cells and Epithelioid cells( note the spelling- its ..lioid)

Foam cells

1. Fat-containing macrophage.
2. Characteristic feature in the formation of atheromatus plaques.

Epithelioid cells.

1. In special situations, epithelial cells lack  a free surface.
2. Derived from progenitor mesenchymal cells.( such cells are present in testis,ovaries, pancreas, adrenal gland,...)
3. Epithelioid patterns are also formed by accumulations of connective tissue macrophages in response to certain types of injury and infections, as well as by many tumors derived from epithelium.

Lymphocytes and plasma cells

Lymphocytes

1. Three groups of lymphocytes can be identified according to size: small, medium, and large (ranging in diameter from 6 to 30 micrometer).
2. In blood stream, most lymphocytes are small (90%) or medium sized.
3. The mature lymphocyte approximates the size of an erythrocyte.

Plasma cells

1.  Antibody producing cells derived from B lymphocytes.
2. Relatively large, ovoid cell (20 micrometer) with a considerable amount of cytoplasm.
3. The cytoplasm displays strong basophilia because of an extensive rER.
4. Also exhibit a clear area in the cytoplasm near the nucleus (negatively stained regions- Golgi apparatus)
5. Nucleus- spherical and typically offset or eccentrically positioned. Small, not much larger than the nucleus of lymphocyte. Exhibit large clumps of peripheral heterochromatin alternating with clear areas of euchromatin (cartwheel/analog clock face).

Neutrophils and Eosinophils

Let's start.

The blog intends to help preclinical  students with their histopathology record .
Even though medical schools have different format for the records, the basic facts are all the same.
I would  like to post some of the  drawings  here with necessary points and corrections.  
I hope you will support and encourage me.
we are medical students now, this is the best time  to commit mistakes!