A 49-year-old administrative assistant comes to your office for evaluation of dizziness. You elicit the information that the dizziness is a spinning sensation of sudden onset, worse with head position changes. The episodes last a few seconds and then go away, and they are accompanied by intense nausea. She has vomited one time. She denies tinnitus. You perform a physical examination of the head and neck and note that the patient's hearing is intact to Weber and Rinne and that there is nystagmus. Her gait is normal. Based on this description, what is the most likely diagnosis?

Correct Answer: A

Rationale: The patient's presentation of sudden-onset spinning sensation triggered by head position changes, accompanied by nausea and vomiting without tinnitus, is characteristic of benign positional vertigo (BPV). BPV is caused by displaced otoconia (calcium crystals) within the semicircular canals of the inner ear. These crystals disrupt the normal flow of fluid in the inner ear, leading to false signals being sent to the brain about head movement. This results in brief episodes of vertigo triggered by specific head positions.

Correct Answer: B

Rationale: Secondary amenorrhea refers to the absence of menstruation for 3-6 months in a woman who previously had regular menstrual cycles. In this case, Jean's lack of menstruation after giving birth and while breastfeeding her child for 6 months likely indicates secondary amenorrhea. This temporary suppression of ovulation and menstruation commonly occurs during breastfeeding due to the high levels of the hormone prolactin, which is responsible for milk production and can inhibit ovulation and menstruation. It is a natural phenomenon known as lactational amenorrhea. Once breastfeeding decreases or stops, menstruation usually resumes within a few months.

Correct Answer: C

Rationale: The characteristics described - being louder and higher in pitch, with a short silence between inspiration and expiration, and expiration being longer than inspiration - are indicative of the bronchial lung sound. The bronchial sound is typically heard over the trachea area and can be louder and higher-pitched than other lung sounds due to conduction of sounds through the bronchial tree. The short silence between inspiration and expiration is due to the short expiratory phase during which air rushes out quickly, whereas expiration is longer than inspiration in this sound due to the increased airflow velocity during expiration.

Correct Answer: C

Rationale: The most logical sequence for the patient-provider interview is to greet the patient, establish rapport, invite the patient's story, establish the agenda, expand and clarify the patient's story, and negotiate a plan. This sequence ensures a patient-centered approach by first building a connection with the patient, allowing the patient to share their concerns and story, and then working collaboratively with the patient to address these concerns. It is important to start by building rapport to establish trust and a comfortable environment for the patient to open up about their health concerns. Inviting the patient's story allows the provider to understand the patient's perspective and how their symptoms are impacting their life. Establishing the agenda sets the priorities for the visit and ensures that both the provider and patient are on the same page. Expanding and clarifying the patient's story helps gather more detailed information, leading to a comprehensive assessment. Finally, negotiating a plan together with the patient ensures shared decision-making and a patient-centered approach

Correct Answer: B

Rationale: Cheyne-Stokes respiration is characterized by a pattern of breathing with gradual increase and then decrease in depth of breaths, followed by a period of apnea. This cycle repeats itself. It is commonly seen in patients with heart failure and other conditions affecting the central nervous system. The patient in this scenario is not in distress, which is typical of Cheyne-Stokes respiration. Ataxic (Biot's) breathing is characterized by unpredictable irregular breaths with varying depths and irregular pauses; it is seen in patients with damage to the medulla. Kussmaul's respiration is deep, rapid, and labored breathing seen in metabolic acidosis. COPD with prolonged expiration is a characteristic finding in patients with chronic obstructive pulmonary disease, but in this case, the described breathing pattern is more consistent with Cheyne-Stokes respiration.

Correct Answer: B

Rationale: A hard mass in the midline of the palate with no associated mucosal abnormalities is most likely a torus palatinus. Torus palatinus is a benign bony growth that often occurs in the midline of the hard palate. It is typically asymptomatic and does not require treatment unless it causes issues with function or hygiene. Leukoplakia is a clinical term used to describe a white patch in the mouth that cannot be scrapped off and is associated with a risk of cancer. Thrush (candidiasis) presents as white, creamy patches in the mouth that can be scrapped off and is caused by a yeast infection. Kaposi's sarcoma presents as red or purple patches or nodules in the mouth and is associated with immunocompromised individuals, like those with HIV/AIDS.

Correct Answer: C

Rationale: The described clinical presentation is consistent with internal hemorrhoids. The typical symptoms of internal hemorrhoids include painless rectal bleeding, protrusion from the anus during straining, and a feeling of incomplete evacuation. In this case, the protrusion is observed to be red, moist, and enlarges with bearing down, all indicative of internal hemorrhoids. The enlarged tender area felt on digital rectal examination supports the diagnosis. Additionally, the presence of blood on the glove after the examination is also suggestive of internal hemorrhoids causing bleeding. Anal fissures typically present with sharp pain during defecation and may have visible tears in the anal mucosa. External hemorrhoids are usually more painful and can be felt as a lump around the anus. Anorectal fistulas have different signs and symptoms, including discharge of pus and recurrent infections.

Correct Answer: A

Rationale: When a patient presents with epistaxis (nosebleed), other causes such as intracranial hemorrhage should be considered. Intracranial hemorrhage refers to bleeding within the skull, which can sometimes manifest as epistaxis. Common symptoms of intracranial hemorrhage include severe headache, altered mental status, focal neurological deficits, and sometimes, epistaxis. It is essential to assess for signs of increased intracranial pressure or neurological deficits if a patient with epistaxis has a history of trauma or other risk factors for intracranial bleeding. Immediate medical evaluation and imaging studies may be necessary to rule out intracranial hemorrhage in such cases to prevent serious consequences.

Correct Answer: B

Rationale: A condylar joint is a type of synovial joint that allows movement in two planes, typically flexion/extension and abduction/adduction. The interphalangeal joints of the hand, which are the joints between the phalanges (finger bones), exhibit this type of movement, making them an example of a condylar joint. The hip joint (choice A) is a ball-and-socket joint, the temporomandibular joint (choice C) is a hinge joint, and the intervertebral joint (choice D) is a cartilaginous joint, none of which are examples of condylar joints.