A patient presents with recurrent episodes of epistaxis, particularly after blowing the nose or during dry weather. Anterior rhinoscopy reveals a friable, vascular lesion in Little's area. Which of the following interventions is most appropriate for managing this condition?

Correct Answer: B

Rationale: The clinical scenario described is consistent with a diagnosis of anterior epistaxis due to a prominent vascular lesion located in Little's area, which is an important site for nosebleeds. Silver nitrate cautery is the most appropriate intervention for managing this condition. Silver nitrate cautery is a commonly used method to chemically cauterize and eliminate the friable blood vessels responsible for recurrent epistaxis. It is a cost-effective and minimally invasive technique that can be easily performed in an outpatient setting. Nasal packing with anterior nasal tampons might be considered in cases of severe or refractory epistaxis, but in this scenario, where the source of bleeding is localized and identifiable, silver nitrate cautery is the treatment of choice. Endoscopic cauterization of the sphenopalatine artery and surgical excision of a nasal polyp are unnecessary and overly invasive for the described scenario.

Correct Answer: A

Rationale: The presentation described with sudden-onset, painless vision loss, a cherry-red spot at the macula, and attenuated retinal vessels is classic for central retinal artery occlusion (CRAO). CRAO occurs when the central retinal artery, which supplies blood to the inner retinal layers, becomes occluded. The cherry-red spot is due to the exposure of the underlying choroid, which still appears red as it is not affected by the blockage. Attenuated retinal vessels and a pale retina may also be seen due to ischemia. In contrast, central retinal vein occlusion (choice B) presents with sudden painless vision loss, retinal hemorrhages, dilated retinal veins, and cotton-wool spots. Retinal detachment (choice C) typically presents with flashes, floaters, and a curtain-like shadow across the vision. Acute angle-closure glaucoma (

Correct Answer: A

Rationale: The presentation of sudden-onset, painless vision loss in the right eye with a cherry-red spot at the macula and attenuated retinal vessels is classic for central retinal artery occlusion (CRAO). In this condition, the blockage of the central retinal artery results in severe ischemia of the retina, leading to rapid and profound vision loss. The cherry-red spot at the macula is a result of preserved choroidal circulation contrasting with the pale, ischemic retina. Attenuated retinal vessels are also commonly observed due to decreased blood flow. Prompt evaluation and management are critical in CRAO to potentially restore some vision and prevent further ischemic damage to the retina.

Correct Answer: A

Rationale: The described presentation is classic for acute angle-closure glaucoma. This condition is characterized by sudden-onset severe eye pain, headache, nausea, and vomiting. The red eye, steamy cornea (corneal edema), and mid-dilated non-reactive pupil are consistent with acute angle-closure glaucoma. The sudden increase in intraocular pressure leads to impaired aqueous humor outflow, causing these symptoms. Immediate intervention is required to prevent permanent vision loss in such cases. Central retinal artery occlusion would present with sudden painless vision loss. Optic neuritis typically presents with vision loss and pain with eye movements. Corneal ulcer presents with eye discomfort, foreign body sensation, and may have a history of corneal trauma or contact lens wear.

Correct Answer: A

Rationale: The liver is responsible for secreting bile, which aids in the emulsification and digestion of fats. Bile is produced by the liver and is stored and concentrated in the gallbladder before being released into the small intestine to help with the breakdown of fats during the digestion process. The gallbladder functions as a storage organ for bile produced by the liver. The pancreas secretes digestive enzymes and bicarbonate to aid in the digestion process, while the spleen is mainly involved in immune function and blood storage.