Minimally invasive adenocarcinoma of the lung

Case contributed by Dr Henry Knipe

Presentation

Chronic cough.

Patient Data

Age: 75
Gender: Female

Rounded opacity demonstrated over the left upper zone on the frontal projection not seen on the lateral projection.

CT confirms a left upper lobe peripherally located nodule, with indistinct, spiculated margins. Opacity associated with the right oblique fissure (shown to be atelectasis on coronals). 

Nuclear medicine

FDG-18 PET-CT

Uptake of tracer is seen in the left upper lobe pulmonary nodule. 

The patient proceeded to left upper lobe wedge resection. 

MACROSCOPIC DESCRIPTION: "Left upper lobe tissue": A wedge of lung 88x28x20mm stapled at one long margin. Sectioning reveals an ill circumscribed cream coloured lesion 20 mm in dimension. It is at least 5mm from the stapled resection margin.

MICROSCOPIC DESCRIPTION: Sections reveal a mucinous adenocarcinoma showing an entirely lepidic mode of spread with no evidence of invasion. The lesion extends to within <1mm of the pleural surface but there is no breach of the pleural surface. The resection margin is 5mm from the lesion.

DIAGNOSIS: Non-invasive mucinous adenocarcinoma (formally termed bronchioloalveolar carcinoma).

Case Discussion

Lung adenocarcinomas with lepidic or minimal invasion are called minimally invasive adenocarcinoma of lung (previously known as bronchoalveolar carcinoma) - this is usually a histopathological diagnosis. 

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Case information

rID: 40285
Case created: 16th Oct 2015
Last edited: 28th Jan 2016
System: Chest
Inclusion in quiz mode: Included

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