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Showing posts from August, 2023

Lobar pneumonia

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 70year old male with complaint of fever X-ray: Homogenous opacity in left upper and mid zones of lung -likely consolidation/mass HRCT: Lobar consolidation on left side involving left upper lobe and lingula with air bronchogram No evidence of bronchus cutoff sign  Fat planes between lesion and mediastinum is well preserved Minimal ground glass opacities noted adjacent to the lesion in left apical region

Schwannoma

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Pathology: T1:  isointense or hypointense T2:  heterogeneously hyperintense (Antoni type A: relatively low; Antoni type B: high) A-densely packed neural and fibrous tissue with little extra cellular fluid B-loosely arranged tissue with more extra cellular fluid LOCATION: intracranial schwannomas cranial nerves: although almost any cranial nerve may be involved, except olfactory nerves and optic nerves which lack sheaths composed of Schwann cells, by far the most commonly involved nerve is the  vestibulocochlear nerve (CN VIII)   non-cranial nerve or intracerebral (very rare)  intraorbital schwannoma: commonly arise from supraorbital and supratrochlear nerves in the upper anterior orbital cavity  10 spinal schwannoma arising from  spinal nerve roots trunk intercostal nerves : see  intercostal nerve schwannoma posterior mediastinum retroperitoneum gastrointestinal schwannoma limbs especially flexor surfaces (specifically ulnar and peroneal...

phthisis bulbi

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 H/o trauma at the age of 5yrs to left eye On usg- The globe is reduced in size (usually <20 mm) with a thickened/folded posterior sclera. Dystrophic calcification is common, and osseous  metaplasia  sometimes occurs, forming what is called "intraocular bone".  CT small and shrunken globe with foci of calcium deposits and ossification in the sclera, cornea, lens, retina, and optic nerve distortion of globe components with challenging to separate and identify structures fibrotic scarring with irregular globe contour and diffusely increased attenuation