"different histologically: diverticula do not have normal bronchial wall morphology"
"A cardiac bronchus arises from the bronchus intermedius, opposite and just distal to the origin of the right upper lobe bronchus. It is variable in size, morphology and length (range from 0.5-5 cm) 1,3. In about half of cases, the cardiac bronchus is a short blind-ending bronchial stump with no branches and does not supply any lung parenchyma. In the remainder, the bronchus may have branches and an amount of aerated lung parenchyma 1."
"A cardiac bronchus arises from the bronchus intermedius, opposite and just distal to the origin of the right upper lobe bronchus. It is variable in size, morphology and length (range from 0.5-5 cm) 1,3. In about half of cases, the cardiac bronchus is a short blind-ending bronchial stump with no branches and does not supply any lung parenchyma. In the remainder, the bronchus may have branches and an amount of aerated lung parenchyma 1."
"There is usually little, if any, differential diagnoses as most cases are classical in appearance. In atypical cases, the differential includes:"