Figure 2From: False positive endobronchial ultrasound-guided real-time transbronchial needle aspiration secondary to bronchial carcinoma in situ at the point of puncture: a case report a: Transbronchial lymph node aspiration specimen: cluster of neoplastic squamous cells (no lymphocytes in this field) (Papanicolau stain, x400) b: Surgical specimen: carcinoma in situ (CIS) on the bronchial resection margin (Haematoxylin&Eosin stain, x400). Back to article page