Mark is a contractor who recently injured his back. He was told he had a "bulging disc" to account for the burning pain down his right leg and slight foot drop. The vertebral bodies of the spine involve which type of joint?

Correct Answer: B

Rationale: The vertebral bodies of the spine involve cartilaginous joints. Cartilaginous joints are connected by cartilage, which allows for slight movement and flexibility. In the spine, the cartilaginous joints between vertebral bodies are called intervertebral discs. These discs act as shock absorbers and provide cushioning between each vertebra, helping to prevent bone-on-bone contact. In Mark's case, the presence of a bulging disc suggests that there is an issue with the cartilaginous joint between his vertebral bodies, leading to the compression of a spinal nerve and causing the burning pain down his right leg and slight foot drop.

Correct Answer: A

Rationale: Scotomas refer to areas of partial alteration in the field of vision. These blind spots can be caused by various eye conditions such as glaucoma, retinal detachment, or optic nerve damage. Symptoms involving the eye like scotomas are important to recognize and address promptly to prevent potential vision loss or other complications. Tinnitus (choice B) refers to ringing in the ears, dysphagia (choice C) refers to difficulty swallowing, and rhinorrhea (choice D) refers to a runny nose, none of which are symptoms involving the eye.

Correct Answer: A

Rationale: Ethnicity is one of the factors used to estimate the 10-year risk of developing coronary heart disease. Different ethnic groups may have varying risks for heart disease based on genetic predisposition, lifestyle factors, and cultural practices. For example, individuals of South Asian descent have been found to have a higher risk of heart disease compared to other ethnic groups. Therefore, considering ethnicity is essential when assessing the overall risk of developing heart disease in an individual.

Correct Answer: D

Rationale: Metrorrhagia refers to abnormal bleeding between menstrual periods. This can manifest as spotting or heavier bleeding outside of the regular menstrual cycle. It is important to differentiate metrorrhagia from other types of abnormal bleeding such as menorrhagia (excessive flow), oligomenorrhea (infrequent bleeding), and polymenorrhea (fewer than 21 days between menses) in order to address and diagnose the underlying cause accurately.

Correct Answer: D

Rationale: The most likely cause of the woman's symptom of stool leakage despite normal bowel movements is an anorectal fistula. An anorectal fistula is an abnormal, tunnel-like connection between the anal canal or rectum and the skin around the anus. In this case, the small opening anterior to the anus with surrounding erythema on examination suggests the presence of a fistula.

Correct Answer: C

Rationale: A positive transillumination test is a key finding that would lead you to suspect a hydrocele as the cause of scrotal swelling. In a hydrocele, the scrotal fluid transilluminates well, meaning that when a light is shone through the scrotum, it will appear as a fluid-filled sac with a clear glow. This is a characteristic feature of a hydrocele and helps differentiate it from other causes of scrotal swelling, such as hernias or testicular tumors. Presence of bowel sounds in the scrotum (Choice A) would be concerning for a hernia rather than a hydrocele. Being unable to palpate superior to the mass (Choice B) may suggest a large hydrocele but is not specific to diagnosing a hydrocele. The normal thickness of the skin of the scrotum (Choice D) can be found in various scrotal conditions and is not specific

Correct Answer: B

Rationale: The vertebral bodies of the spine involve cartilaginous joints. Cartilaginous joints are connected by cartilage, which allows for slight movement and flexibility. In the spine, the cartilaginous joints between vertebral bodies are called intervertebral discs. These discs act as shock absorbers and provide cushioning between each vertebra, helping to prevent bone-on-bone contact. In Mark's case, the presence of a bulging disc suggests that there is an issue with the cartilaginous joint between his vertebral bodies, leading to the compression of a spinal nerve and causing the burning pain down his right leg and slight foot drop.

Correct Answer: C

Rationale: Given the patient's presentation of itching, anorectal pain, and tenesmus, along with rectal examination findings of generalized tenderness without prostate abnormalities, proctitis is the most likely diagnosis. Proctitis is inflammation of the rectal lining and is commonly associated with symptoms such as rectal pain, itching, tenesmus (feeling of incomplete defecation), and sometimes rectal bleeding. It can have various causes, including sexually transmitted infections (such as gonorrhea, chlamydia), inflammatory bowel disease, radiation therapy, or trauma.

Correct Answer: C

Rationale: Diplopia occurring when one eye is covered is a condition known as monocular diplopia. This symptom is typically not caused by problems within the eye itself, such as irregularities in the cornea or lens. Instead, monocular diplopia with one eye covered is more likely to be an indication of a neurological issue, often involving the brainstem. Lesions or damage in the brainstem can disrupt the normal coordination of eye movements, leading to the perception of double vision when one eye is closed. Weakness of CN III (oculomotor nerve) or CN IV (trochlear nerve) may cause diplopia when both eyes are open, but it would not typically manifest as monocular diplopia.