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radiation-induced lung injury acute(1-3months)
impaired gas exchange due to exudative alveolitis → ☆hyaline membrane formation, pneumocyte sloughing(slúː)

chronic(6-12months)
radiation fibrosis(dense fibrous bands) results in decreased lung volume and dilated bronchi and bronchioles(ie traction bronchiectasis)
(predisposition to chronic infections)
respiratory radiology UWorld Jul 5, 2020, 5:34 AM   HirotoShishido

late stage radiation dermatitis (months to years, acute<90 days after radiotherapy)

fibrosis= ☆homogenization of dermal collagen, vascular damage→ chronic hypoxia and ulceration, ☆abnormal dilatied microvasculature(ie telangiectasias)
dermatology radiology UWorld May 30, 2020, 2:32 AM   HirotoShishido

70 yo woman, skinny, no past operation
the common cause of obstruction easily missed out obturator hernia
radiology gastrointestinal Sep 26, 2019, 3:51 AM   HirotoShishido

Picture portal venous gas

ischemic bowel is common
mural gas as well as mesenteric gas can be seen

hemorrhagic ascites can be seen either
radiology gastrointestinal Sep 26, 2019, 3:46 AM   HirotoShishido

Picture pulmonary embolism
radiology Sep 26, 2019, 3:21 AM   HirotoShishido

Picture double wall sign

pneumoperitoneum
radiology gastrointestinal Sep 26, 2019, 3:20 AM   HirotoShishido

Picture "spicular radiation"
→adenocarcinoma
radiology respiratory Sep 19, 2019, 2:29 AM   HirotoShishido

Picture "rib notching"

coarctation of the aorta
Takayasu disease(subclavian artery obstruction)
radiology Sep 19, 2019, 2:23 AM   HirotoShishido

mediastinal tumor anterior→3T(thymoma, teratoma, thyroid goiter), Morgagni hernia(anterior right, late onset)

middle→bronchogenic cyst, pericardiac cyst

posterior→neurogenic tumor, Bochdalek hernia(posterior left, observable simaltaneously with the birth)
respiratory radiology Sep 19, 2019, 2:16 AM   HirotoShishido

Picture
another possible findings "golden S sign"(right upper lobe collapse+ hilar mass)
→squamous cell carcinoma

cavitation caused by necrosis(82%)
radiology respiratory Sep 19, 2019, 1:54 AM   HirotoShishido

Picture secondary tuberculosis

"tree-in-bud appearance"
→endobronchial spread of infection
radiology microbiology respiratory Sep 19, 2019, 1:43 AM   HirotoShishido

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