PMC5234200_01
Computed tomography chest showing a spiculated nodule in the middle lobe of the right lung (a, coronal section; b, axial section). The nodule is surrounded by lung parenchyma on all sides and is away from the hilum. Radial ultrasound image (c) showing the lung nodule along with the placement of the radial probe in the lateral segment of the right middle lobe (inset). (d) A cluster of tumor cells showing moderate nuclear pleomorphism, round nuclei, coarse chromatin, occasional prominent nucleoli and moderate amount of vacuolated cytoplasm with intracytoplasmic mucin (arrows, MGG, x40)
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F1
A spiculated nodule measuring 2.8 cm x 2.7 cm was seen in the right middle lobe, about 1.5 cm away from the hilum [Figure 1a and b]. TBNA was performed using a 21-G needle (Smooth Shot, NA-401D 1321; minimal channel size required 2 mm, Olympus, Japan) at the visually chosen site under endoscopic vision [Figure 1c]. Cytological examination revealed clusters of tumor cells with intracytoplasmic mucin suggestive of adenocarcinoma [Figure 1d].