50. Planocellular carcinoma of the lung: Difference between revisions
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'''Description''': | '''Description''': | ||
We can see cartilage and respiratory epithelium, so we know that this is a bronchus. | We can see cartilage and respiratory epithelium, so we know that this is a bronchus. We can divide the slide into 5 “parts”: | ||
We can divide the slide into 5 “parts”: | |||
* 1 shows normal, healthy respiratory epithelium | * 1 shows normal, healthy respiratory epithelium | ||
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'''Diagnosis''': Squamous cell lung carcinoma | '''Diagnosis''': Squamous cell lung carcinoma | ||
'''Risk factors''': Smoking[[File:Squamous carcinoma of lung part 1.png|thumb|From part 1. Shows normal, healthy respiratory epithelium.]]'''Theory''': Squamous cell carcinoma in the lung usually occurs centrally, around the hilum. It shows symptoms earlier than adenocarcinomas and large cell carcinomas, which grow peripherally. However, also because of the central location is surgical removal of squamous cell carcinomas more difficult than for the peripheral-growing cancers. | '''Risk factors''': Smoking[[File:Squamous carcinoma of lung part 1.png|thumb|From part 1. Shows normal, healthy respiratory epithelium.]]'''Theory''': Squamous cell carcinoma in the lung usually occurs centrally, around the hilum. It shows symptoms earlier than adenocarcinomas and large cell carcinomas, which grow peripherally. However, also because of the central location is surgical removal of squamous cell carcinomas more difficult than for the peripheral-growing cancers. In this slide we can see several stages of cancer development, from hyperplasia to metaplasia to dysplasia to cancer. Squamous cell lung cancer can metastasize into pericardium, mediastinum, aorta and even the heart.[[File:Squamous carcinoma of lung part 2.png|thumb|From part 2. Shows goblet cell and basal cell hyperplasia. Basal cells are the cells that are in contact with the basement membrane.|left]] | ||
In this slide we can see several stages of cancer development, from hyperplasia to metaplasia to dysplasia to cancer. Squamous cell lung cancer can metastasize into pericardium, mediastinum, aorta and even the heart.[[File:Squamous carcinoma of lung part 2.png|thumb|From part 2. Shows goblet cell and basal cell hyperplasia. Basal cells are the cells that are in contact with the basement membrane.|left]] | |||
[[File:Squamous carcinoma of lung part 3.png|thumb|From part 3. Shows the border between respiratory epithelium and squamous metaplasia (upper half of the slide). You can see that the squamous metaplasia doesn’t have kinocilia.]] | [[File:Squamous carcinoma of lung part 3.png|thumb|From part 3. Shows the border between respiratory epithelium and squamous metaplasia (upper half of the slide). You can see that the squamous metaplasia doesn’t have kinocilia.]] | ||
[[File:Squamous carcinoma of lung part 4.png|thumb|From part 4. Shows squamous cell dysplasia and carcinoma in situ.|left|285x285px]] | [[File:Squamous carcinoma of lung part 4.png|thumb|From part 4. Shows squamous cell dysplasia and carcinoma in situ.|left|285x285px]] | ||
Latest revision as of 13:10, 5 July 2024
Staining: HE
Organ: Bronchus
Description:
We can see cartilage and respiratory epithelium, so we know that this is a bronchus. We can divide the slide into 5 “parts”:
- 1 shows normal, healthy respiratory epithelium
- 2 shows goblet cell hyperplasia and basal cell hyperplasia
- 3 shows squamous cell metaplasia
- 4 shows squamous cell dysplasia and carcinoma in situ
- 5, which is the majority of the slide, shows the invasive carcinoma
The carcinoma cells show pleomorphism and mitotic figures and giant cells are present.
Diagnosis: Squamous cell lung carcinoma
Risk factors: Smoking
Theory: Squamous cell carcinoma in the lung usually occurs centrally, around the hilum. It shows symptoms earlier than adenocarcinomas and large cell carcinomas, which grow peripherally. However, also because of the central location is surgical removal of squamous cell carcinomas more difficult than for the peripheral-growing cancers. In this slide we can see several stages of cancer development, from hyperplasia to metaplasia to dysplasia to cancer. Squamous cell lung cancer can metastasize into pericardium, mediastinum, aorta and even the heart.
