Histological classification depends on the
anatomical location and the cell type.
Primary lung tumours
Bronchogenic (columnar cell) carcinomas,
including adenocarcinomas and squamous cell carcinomas.
Bronchoalveolar (cuboidal cell) carcinomas,
which may be present as multiple nodules arising from multicentric sources.
Secondary (metastatic spread)
Primary lung tumours can metastasise
within the lung itself by lymphogenous and haematogenous routes or by transmigration
of cells across alveoli and bronchi.
The lung is a major site for metastases
from neoplasia in other organs, and metastatic spread from neoplasms is often
the prime reason for euthanasia in cancer patients.
The major carcinomas metastasising to
the lung include mammary and thyroidal adenocarcinomas, tonsillar and digital
cell squamous carcinoma, digital melanoma, lymphosarcoma and osteosarcoma.
Multicentric neoplasms, such as lymphoma
and mastocytoma, may have the lung as one of the tumour sites.
Neoplasia of the larynx and trachea is
PULMONARY NEOPLASIA: Clinical signs
PULMONARY NEOPLASIA: Diagnosis
PULMONARY NEOPLASIA: Therapy
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