Brief Answer: It has to be differentiated from pleural effusion. Detailed Answer: Hello XXXXXXX Your description is not very clear. It must be `focal pleural thickening along anterior basal segment Rt lower lobe` and not `focal thickening a long basal segment Rt lower lobe(no space between a and long).` There can be many causes of pleural thickening, some common ones being infection, trauma to chest wall, drugs etc. Most common cause in our country is TB and for visa, concerned authorities may want to rule out Tubercular infection. From your description it is clear that your husband has no symptoms and it is only an accidental finding. However you may get an USG chest done to differentiate it from fluid collection ie pleural effusion, though it looks highly unlikely. Better would be a CT chest which may show the status of underlying lungs also.

---

Brief Answer: You have not given the details of the operation. Detailed Answer: You have not mentioned what kind of operation has been done. Is it a biopsy or removal of some part of lung/pleura and what for surgery has been done? it is important. If it`s a major surgery, there may be collection of some fluid which will dry up eventually and may lead pleural thickening which will also disappear over a course of time.

---