Atypical adenomatous hyperplasia is a subtype of
pneumocytic hyperplasia Pneumocytic hyperplasia is an hyperplasia of pneumocytes lining pulmonary alveoli.
Types
*Pulmonary atypical adenomatous hyperplasia
*Multifocal micronodular pneumocyte hyperplasia
References
Pulmonary lesion
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in the
lung. It can be a precursor lesion of
in situ adenocarcinoma of the lung (
bronchioloalveolar carcinoma
Adenocarcinoma in situ (AIS) of the lung —previously included in the category of "bronchioloalveolar carcinoma" (BAC)—is a subtype of lung adenocarcinoma. It tends to arise in the distal bronchioles or alveoli and is defined by a non-invasive ...
).
In prostate tissue biopsy, it can be confused for
adenocarcinoma of the prostate. The needle biopsy rate is less than 1%.
Pathology
Morphological differential diagnosis
*
Multifocal micronodular pneumocyte hyperplasia (MMPH)
*
in situ pulmonary adenocarcinoma (
bronchioloalveolar carcinoma
Adenocarcinoma in situ (AIS) of the lung —previously included in the category of "bronchioloalveolar carcinoma" (BAC)—is a subtype of lung adenocarcinoma. It tends to arise in the distal bronchioles or alveoli and is defined by a non-invasive ...
– BAC)
Variants
* multiple atypical adenomatous hyperplasia
* disseminated AAH
Histopathological images
Image:Pulmonary_adeocaricnoma_(1)_localized_noninvasive_type.jpg
Image:Pulmonary adeocaricnoma (2) localized noninvasive type.jpg
Image:Pulmonary adeocaricnoma (3) localized noninvasive type.jpg
Image:Pulmonary_adeocaricnoma_(4)_localized_noninvasive_type.jpg
See also
*
EGFR
*
KRAS
''KRAS'' ( Kirsten rat sarcoma virus) is a gene that provides instructions for making a protein called K-Ras, a part of the RAS/MAPK pathway. The protein relays signals from outside the cell to the cell's nucleus. These signals instruct the cel ...
References
Pulmonary lesion
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