TABLE 4.

Pathologic Features of LNI of Patients With BI-ALCL (n = 14)

	N (%)
Specimen type
Excisional biopsy	7 (50.0)
Lymph node dissection	6 (42.9)
Needle biopsy	1 (7.1)
Lymph node maximum dimension (n = 13)
Median (mm)	23.6
Range (mm)	8.9-51
Lymphoma features
Pattern of infiltration
Sinusoidal	13 (92.9)
Perifollicular	7 (50.0)
Interfollicular	12 (85.7)
Diffuse	4 (28.6)
Hodgkin lymphoma like*	2 (14.3)
Tumor burden
Median (%)	25
Range (%)	1-95
Cytomorphology
Oval	13 (92.9)
Lobated	9 (64.3)
Anaplastic	5 (35.7)
Hallmark cells	7 (50.0)
Lymph node necrosis	5 (35.7)
Non-neoplastic features
Follicular hyperplasia	13 (92.9)
Paracortical hyperplasia	5 (35.7)
Sinus histiocytosis	8 (57.1)
Eosinophils	13 (92.9)
Refringent material	1 (7.1)
Foamy histiocytes	1 (7.1)

^*Hodgkin lymphoma-like: 1 nodular sclerosis HL-like, 1 mixed cellularity HL-like.