What does "tree-in-bud" pattern mean?
What exactly does the following mean?
There are a few clusters of peripheral micronodules in the left lower lobe
laterally with a "tree-in-bud" pattern, likely sequelae from previous atypical
infection such as Mycobacterium avium complex
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Hi Penelope,
I have been going through this since September of last year. I have had 3 CT scans which showed a lot of tree buds and also one upper right nodule of 12 mm which is now 9.5 mm and a 19 mm lower right nodule treated with antibiotics and prednisone because it was thought to be an infection. Had a Bronchoscopy on 1/23/24 test for MAC and other things. Six weeks results said no MAC no bacteria. I thought six weeks was early to diagnose but was told that liquid mycobacterium cultures are only kept for six weeks. Sorry, I am rambling, I am still coughing like crazy and was sent to a allergist because of high eosinophils and Ige levels. Was told I have asthma due to allergies and was given an inhaler, that was yesterday! In the meantime, I still have two nodules that have not been biopsied because they believe it was a infection but there was no infection because courses of antibiotics did not work. I know asthma can cause coughing but I don’t know about nodules! Seeing pulmonary doctor on the 21st. I just don’t know to do anymore!
Thank you!
Best wishes for your health.
@mcdc1959 It's my understanding that since MAC is slow growing it takes at least 2 months to grow it in the lab from sputum culture. I did not know that the timing for cultures from bronchoscopy were different than sputum sample? That might be something to question pulmonary about, and/or I hope others could share their experience with timing around bronchoscopy cultures. I hope you get some answers.
Just checked pulmonary doctor exact words:
Liquid mycobacterium 6 weeks.
Solid media cultures in the past could be held till
8 weeks.
Scoop and @mcdc1959 - MAC grows within 6 weeks in the lab. Extra time is needed to perform sensitivity testing and, if necessary, strain isolation.
So, if there is nothing in 6 weeks, it is pretty certain there was none where sampled. If they did a bronchoscopy, especially with bronchial lavage, you can breathe a sigh of relief.
Sue
Thank you, feel much better about the result now!