The classification of cells by 6 types of histograms is the simplest and most generally accepted method in current use at M. D. Anderson Cancer Center.
  Histogram Patterns by Lymphoma Subtypes
 

Lymphoma Subtype*	L-I	L-IA	L-II	L-IIA	L-III	L-IIIA
Reactive	6		4		5
Small cleaved	33	1	1			1
Small lymphocytic	14		3
Mixed cell	5		5	5
Mantle cell	1		3
Large cell	1	1	8	13	11	10
Ki-1						4
Immunoblastic				1	1	1
Lymphoblastic						1
Peripheral T-cell				1
Hodgkin's Disease	1		1	2		1

* According to the working formulation for non-Hodgkin's Lymphoma. 

Note: L-I, L-II, L-III subdivided by proliferation index: I < 1.2; II < 4.0; III > 4.0. L-IA, L-IIA, L-IIIA are as above but with hyperdiploid cells (DNA content > 5c).
 

Relationship between Histogram Patterns and Grade of Non-Hodgkin's Lymphoma and Reactive Lymph Nodes
 

Lymphoma Grade	L-I, L-IA	L-II, L-IIA	L-III, L-IIIA	Total
Low	54	14	3	71
Intermediate	2	19	18	39
High	0	0	8	8
Reactive	6	4	5	15
TOTAL				133

Note: According to the Working Formulation for non-Hodgkin's lymphoma. 

Reference: Katz RL, Wojcik EM, Johnston DA: Image analysis in non-Hodgkin's lymphomas emphasizing applications in tissue procured by fine needle aspiration. In: GL Wied. ed. Compendium on the Computerized Cytology and Histology Laboratory, Science Printers and Publishers, Inc., St. Louis, MO, 1993.