Lymphoid & hematopoietic tissues

Lymph nodes are cell aggregations
By lymphatics resembling stations
Their round cell collections
Drain down from infections
And deal with immune information.

Depending on what they will drain
The changes in nodes may be same
Pharyngeal carcinomas
TB granulomas
Oat cells or fungi or squames.

Malignant lymphomas arise
From cells that nodes normally comprise
Infiltrations are seen
In the liver and spleen
Going far as the orbit and eyes.

Lymphomas have T cells or B
1gM IgA or gG
Centrocyte centroblastic
With names quite fantastic
LikeKi-] orAILD.

The stomach and gut grow lymphomas
That some have rechristened MALTomas
Monocytoid or small
B overall
Less lethal than most carcinomas.

Cancer of blood is leukemia
Eventually causes anemia
Platelets suppressed
Resistance depressed
Typically leucocythemia.

Acute myeloid is the worst
White counts may be low at first
But myetoblasts
Fill marrow quite fast
Then into the blood stream they burst.

Chronic lymphatic's the best
Grows slower than all of the rest
May go on for years
With minimal fears
Its cells treat the host like they're guests.