A patient presents with multiple, discrete, flesh-colored papules with central umbilication on the trunk and extremities. The lesions are asymptomatic and have been present for several months. Which of the following conditions is most likely responsible for this presentation?

Correct Answer: A

Rationale: Molluscum contagiosum is a viral skin infection caused by the poxvirus. It typically presents as multiple, flesh-colored, dome-shaped papules with a central umbilication (dimple or depression in the center) on the skin. These lesions are often found on the trunk and extremities and can persist for several months. Molluscum contagiosum is commonly seen in children but can also occur in adults, especially those with weakened immune systems. The lesions are usually asymptomatic but can become inflamed or itchy in some cases. Treatment options include observation, topical therapies, cryotherapy, or curettage.

Correct Answer: C

Rationale: The presentation described with a sensation of fullness and pressure in the left ear, along with hearing loss and occasional tinnitus, and the findings of a retracted tympanic membrane with decreased mobility on pneumatic otoscopy are most consistent with serous otitis media, also known as otitis media with effusion (OME). OME is characterized by the presence of non-infected fluid in the middle ear space, leading to symptoms such as ear fullness, hearing loss, and occasionally tinnitus.

Correct Answer: C

Rationale: The presentation described in the question (sensation of fullness and pressure in the left ear, hearing loss, occasional tinnitus, retracted tympanic membrane with decreased mobility on pneumatic otoscopy) is suggestive of serous otitis media, also known as otitis media with effusion. Serous otitis media occurs when fluid accumulates in the middle ear without signs of infection. This buildup of fluid in the middle ear space can cause the tympanic membrane to retract and reduce its mobility on pneumatic otoscopy.

Correct Answer: A

Rationale: The patient's presentation of sudden-onset, painless vision loss in the right eye, along with a cherry-red spot at the macula and attenuated retinal vessels, is classic for central retinal artery occlusion (CRAO). In CRAO, there is a sudden blockage of the central retinal artery, leading to ischemia of the retina. The cherry-red spot represents the preserved choroid blood flow against the ischemic retina. The attenuated retinal vessels are a result of decreased blood flow in the retinal circulation. This condition is considered an ophthalmic emergency and requires immediate evaluation and management to prevent permanent vision loss.

Correct Answer: A

Rationale: The patient presents with gradual, painless visual field loss in both eyes, particularly in the peripheral vision, which is characteristic of glaucoma. The elevated intraocular pressure (IOP) on tonometry further supports a diagnosis of glaucoma. Open-angle glaucoma is the most common type of glaucoma and typically presents insidiously with a slow progression of vision loss. In open-angle glaucoma, the drainage angle of the eye remains open but becomes less efficient over time, leading to increased intraocular pressure and optic nerve damage. This results in peripheral visual field loss. Closed-angle glaucoma, on the other hand, presents more acutely with sudden eye pain, redness, and blurred vision due to a sudden increase in intraocular pressure from a blocked drainage angle. Age-related macular degeneration and diabetic retinopathy typically do not present with elevated IOP or peripheral visual field loss.