5.60 yrs old was subjected
to chest x ray hemoptysis and a solitary pulmonary nodule is noted in left mid
lung field.Features on CT/PET favouring the diagnosis of malignancy are all except
a.irregular /speculated
margin
b.laminated calcification
c.volume doubling time
30-400 days
d.enhancement more than 20HU
e.increased uptake of FDG
5.---b
Calcification occurs in upto 14% of lung cancer.The
calcification is amorphous while diffuse solid ,central punctuate,laminated or
popcorn-like calcification are noted in benign lesions.
Lung cancers typically double in volume (an
increase of diameter of 26% in diameter) between 30-400days (average 240 days).An absence of growth over a
2-year period is usually a reliable feature of benign nodule.
Cavitation in malignant nodule shows thick irregular wall (thin and
smooth wall in benign nodule)
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