Figure 2 : (A) The cellblock material from an EBUS-guided fine needle aspiration (FNA) of a 4R lymph node reveals multiple small foci of non-necrotizing granulomatous inflammation (100x).

(B) The non-necrotizing granulomas contain wellformed aggregates of epithelioid histiocytes with a tight, circumscribed appearance (200x). Grocott methenamine silver (GMS) stains for fungal organisms and acid-fast bacilli (AFB) stains for mycobacteria were performed to assess for an infectious etiology and were negative. The lack of infectious organisms and the well-circumscribed appearance of the non-necrotizing granulomas is typical of sarcoidosis.

Ramadas et al.Journal of Cancer Therapeutics and Research  2016 5:2DOI : 10.7243/2049-7962-5-2