53 yrs old female with NHL suspition. Coeliac lymph node biopsy was taken together with threpine biopsy.  
HISTO: Vagually nodular pattern consisting of epithelioid histiocytes nodules and diffuse monotonous T cell back.  
THREPINE: Focal identical infiltrates in BM.  
IH: T population: CD3/CD5+; CD7/PD1/CD8/GranzymB/CK56(-); CD57(+/-); CD4+; Ki67 <5%.  
Flow (BM): Lympho population~5% (small lymphos). T lymphos (CD3+) ~ 95%, Th:Tc = 3,3. ~62% of lymphos: abberant: CD45+, CD2+, CD3+, CD4+, CD5+, TCR alfa beta+, CD7-, CD8-, CD16-, CD56-, CD57-, TCR gama delta-. T LPD possible.  
 
DIAGNOSIS: Peripheral T cell lymphoma: "lymphoepithelioid lymphoma" aka Lennert's lymphoma: nodal and BM involvement.