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Well-demarcated, nodular lesions ranging 2–5 mm in pulmonary parenchyma. Type II pneumocytes without nuclear atypia lined thickened alveolar septa and proliferated papillary structures. Enlarged cuboidal cells lining mildly thickened alveolar septa. [11] Enlarged cuboidal cells have abundant, eosinophilic cytoplasm and large, round nuclei. [12]
Pneumocytic hyperplasia is an hyperplasia of pneumocytes lining pulmonary alveoli. Types. Pulmonary atypical adenomatous hyperplasia;
Nodular density is used to distinguish larger lung tumors, smaller infiltrates or masses with other accompanying characteristics. An often used formal radiological definition is the following: a single lesion in the lung completely surrounded by functional lung tissue with a diameter less than 3 cm and without associated pneumonia , atelectasis ...
Atypical adenomatous hyperplasia is a subtype of pneumocytic hyperplasia in the lung. It can be a precursor lesion of in situ adenocarcinoma of the lung (bronchioloalveolar carcinoma). In prostate tissue biopsy, it can be confused for adenocarcinoma of the prostate. The needle biopsy rate is less than 1%.
In patients with TSC, nodular densities on HRCT may represent multifocal micronodular pneumocyte hyperplasia (MMPH) made up of clusters of hyperplastic type II pneumocytes. [79] [88] [89] MMPH may be present in males or females with TSC in the presence or absence of LAM, but not in patients with S-LAM. [90]
A new study says the flu A viral strain can adapt shape to stay infectious. Infectious disease doctors break down what this means and how to protect yourself.
In medicine, nodules are small firm lumps, usually greater than 1 cm in diameter. [1] [2] If filled with fluid they are referred to as cysts. [2]Smaller (less than 0.5 cm) raised soft tissue bumps may be termed papules.
Hyperplasia (from ancient Greek ὑπέρ huper 'over' + πλάσις plasis 'formation'), or hypergenesis, is an enlargement of an organ or tissue caused by an ...