0 Radiology Quiz 2

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What is the diagnosis ?

ANSWER:

Rickets: cupping and flaring of bilateral ulnar and radial metaphysis

Image courtesy: Dr. Subhash Goel (M.D. Radiology), Reblogged with permission from Shiviradiology

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MedicoNotebook - Founder : DrShiviMudgal , Co-Founder : DrAyushGoel

0 Medical One Liners 401 - 410

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401. Osteoporosis: decreased bone mass but normal mineralization. (Mineral to matrix ratio normal)

402. Osteomalacia: decreased rate of mineralization, hence increased quantity of non-calcified matrix. (Mineral to matrix ratio decreased)

403. MRI breast: In pre-menopausal women it should be performed between 7th-14th day (2nd week) after start of menstrual cycle, to avoid interference from normal enhancing breast tissue that may otherwise lead to false negative/positive results.

404. Woven bone with osteoblastic rimming:

• Ossfying fibromas (=osteofibrous dysplasia)
• Osteoblastoma 
• Paget’s disease

405. Woven bone without osteoblastic rimming: Fibrous dysplasia

406. Gamekeeper thumb = skier thumb: tear of ulnar collateral ligament (UCL) of the thumb (at 1st metacarpophalyngeal joint)

407. Colles fracture: extra-articular distal radius fracture with dorsal angulation

408. Barton fracture: intra-articular distal radius fracture extending to dorsal aspect

409. Smith fracture - type I: extra-articular distal radius fracture with volar angulation

410. Reverse Barton fracture = type II Smith: intra-articular distal radius fracture extending to volar aspect.

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MedicoNotebook - Founder : DrShiviMudgal , Co-Founder : DrAyushGoel

0 Restricted diffusion (MRI)

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MCQ 166

Q. Which of the following defines "Restricted Diffusion" in MRI ?

a. Hyperintense on DWI, Hypointense on ADC
b. Hypointense on DWI, Hyperintense on ADC
c. Hyperintense on DWI and ADC
d. Hypointense on DWI and ADC

ANSWER:

Answer: A (Hyperintense on DWI, Hypointense on ADC)
Explanation: See - Diffusion MRI

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MedicoNotebook - Founder : DrShiviMudgal , Co-Founder : DrAyushGoel

1 Paragangliomas

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Paraganglion is defined as non neuronal cell derived from the neural crest.

Types:

• Chromaffin cells (Sympathetic paraganglion)
• Pathology e.g.-  Pheochromocytoma

• Non chromaffin cells (Para-sympathetic paraganglion) 
• Pathology e.g.- Carotid body tumor, Glomus juglare, Glomus tympanicum
• [ sometimes called Glomus tumors* ]

*Not to be confused with Glomangioma which are also called Glomus tumors: benign vascular tumors (75% in hand).

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MedicoNotebook - Founder : DrShiviMudgal , Co-Founder : DrAyushGoel