Approach to Common Symptoms (Fever, Pain, Fatigue) — MCQs
Which of the following diseases is commonly referred to as 'breakbone fever'?
A 15-year-old boy presented with fever and chills for 3 days. On examination, he was found to have delayed skin pinch time and dry oral mucosa. Identify the pathogen involved based on the provided peripheral blood smear image.
A 30-year-old male presents with chills and a high fever of 40°C. Which of the following symptoms would most likely suggest an infectious cause?
Which of the following is the BEST definition of hyperpyrexia?
Which of the following is the most appropriate pharmacological treatment for neuropathic pain in a diabetic patient?
Which type of pain is characterized by unknown etiology?
A patient presents with fatigue and is not gaining weight. The body temperature is warm. What would the investigation likely show?
What is the primary mechanism underlying hyperthermia?
Which of the following conditions is least likely to cause multiple painful ulcers on the tongue?
A 25-year-old woman presents with intermittent double vision and fatigue. Her symptoms are worse at the end of the day. She reports no other focal muscle weakness or sensory symptoms. On examination her eye movements, motor strength, and reflexes in the upper and lower limbs are normal. Repetitive handgrip exercises cause loss of strength in the grip. A CXR reveals an anterior mediastinal mass. Which of the following is the most likely diagnosis of the anterior mediastinal mass?
Approach to Common Symptoms (Fever, Pain, Fatigue) Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following diseases is commonly referred to as 'breakbone fever'?
- A. Typhoid fever
- B. Malaria
- C. Dengue fever (Correct Answer)
- D. Malignant fever
Explanation: ***Dengue fever*** - The colloquial term "**breakbone fever**" is commonly used to describe dengue due to the severe **myalgia** and **arthralgia** it causes, leading to a sensation of bones breaking [1]. - This **viral infection** is transmitted by mosquitoes and presents with high fever, headache, retro-orbital pain, and a rash, in addition to the characteristic muscle and joint pain [1]. *Typhoid fever* - This is a **bacterial infection** caused by *Salmonella Typhi*, characterized by a sustained fever, malaise, headache, and sometimes a rash (rose spots), but not the severe bone-breaking pain [2]. - It primarily affects the **gastrointestinal tract** and can lead to complications such as intestinal perforation [2]. *Malaria* - Malaria is a **parasitic disease** transmitted by mosquitoes, known for its cyclical fever patterns, chills, headache, and fatigue. - While it causes significant body aches and headaches, it is not typically referred to as "breakbone fever" because the pain is not as intensely localized to the joints and bones as in dengue. *Malignant fever* - "**Malignant fever**" is not a specific disease, but rather a descriptive term sometimes used for severe, high-grade fevers that are uncontrolled or associated with a grave prognosis. - It does not refer to a distinct condition with characteristic "breakbone" symptoms.
Question 2: A 15-year-old boy presented with fever and chills for 3 days. On examination, he was found to have delayed skin pinch time and dry oral mucosa. Identify the pathogen involved based on the provided peripheral blood smear image.
- A. Babesia
- B. Plasmodium vivax (Correct Answer)
- C. Plasmodium falciparum
- D. Salmonella typhi
Explanation: ***Plasmodium vivax*** - The image shows **enlarged red blood cells** infected with various stages of *Plasmodium vivax*, including trophozoites and schizonts displaying **ameboid forms**. - The presence of **Schüffner's dots**, though not distinctly visible in this specific resolution, is characteristic of *P. vivax* infection. - *P. vivax* preferentially infects **reticulocytes** and young red blood cells, leading to the characteristic RBC enlargement. *Babesia* - *Babesia* infection typically presents with **ring forms** in red blood cells that lack pigment and often form **tetrads** (Maltese cross appearance), which are not seen here. - While it can cause fever and chills, the morphology of the parasites in the image is inconsistent with *Babesia*. *Plasmodium falciparum* - *P. falciparum* characteristically presents with **multiple small ring forms** in a single red blood cell and **crescent-shaped gametocytes**. - It infects red blood cells of all ages, does not typically enlarge the red blood cells, and early trophozoites (*ring forms*) are the most common stage seen in peripheral blood, which differs from the image. *Salmonella typhi* - *Salmonella typhi* is a bacterium that causes **typhoid fever** and is a systemic infection. - It does not infect red blood cells or present with intraerythrocytic parasites on a peripheral blood smear; diagnosis is typically made by **blood culture**.
Question 3: A 30-year-old male presents with chills and a high fever of 40°C. Which of the following symptoms would most likely suggest an infectious cause?
- A. Rigors (Correct Answer)
- B. Excessive sweating
- C. Skin rash
- D. Vomiting
Explanation: ***Rigors*** - **Rigors** (generalized shivering with a sensation of cold) are strong indicators of a rapid and significant rise in body temperature, often seen with **bacteremia** or other severe infections [1]. - The body's defense mechanisms are fighting off a severe infection, leading to an exaggerated physiological response. *Excessive sweating* - **Excessive sweating (diaphoresis)** typically occurs as the body attempts to cool down during the defervescence (fever reduction) phase [1]. - While associated with fever, it is less specific for the *onset* or active phase of an infection compared to rigors [1]. *Skin rash* - A **skin rash** can be a symptom of certain infections (e.g., viral exanthems, meningococcemia) but is not a universal or primary indicator of *any* infectious cause [2]. - Many febrile illnesses do not present with a rash, and rashes can also be non-infectious in origin (e.g., allergic reactions). *Vomiting* - **Vomiting** can accompany many illnesses, both infectious (e.g., gastroenteritis, meningitis) and non-infectious (e.g., migraine, drug reaction). - It is a non-specific symptom that does not singularly point to an infectious etiology as strongly as rigors in the context of a high fever.
Question 4: Which of the following is the BEST definition of hyperpyrexia?
- A. Antipyretics may be ineffective in some cases.
- B. It is defined as a body temperature >41.5°C (Correct Answer)
- C. It does not always indicate an infection.
- D. It can occur in children.
Explanation: **It is defined as a body temperature >41.5°C** - **Hyperpyrexia** refers to an extremely high fever, specifically a core body temperature exceeding **41.5°C (106.7°F)**. - This extreme elevation can be life-threatening and is often associated with conditions like **sepsis**, **central nervous system hemorrhage**, or **drug-induced hyperthermia** [1]. *Antipyretics may be ineffective in some cases.* - While true that antipyretics may be ineffective, this describes a characteristic of treatment rather than a definition of the condition itself. - For instance, in **heatstroke**, antipyretics are largely ineffective because the pathology is non-pyrogenic [1]. *It does not always indicate an infection.* - This statement is correct, as hyperpyrexia can be caused by non-infectious conditions like **heatstroke**, **malignant hyperthermia**, or **drug reactions** [1], [2]. - However, it is an observation about its etiology, not a precise definition of the temperature range for hyperpyrexia. *It can occur in children.* - Hyperpyrexia can indeed occur in children, often due to infections or conditions like **febrile seizures** [2]. - This is a demographic characteristic, not the definition of the abnormal temperature itself.
Question 5: Which of the following is the most appropriate pharmacological treatment for neuropathic pain in a diabetic patient?
- A. Acetaminophen
- B. Tramadol
- C. Aspirin
- D. Gabapentin (Correct Answer)
Explanation: ***Gabapentin*** - **Gabapentin** is a widely recommended first-line treatment for diabetic neuropathic pain due to its efficacy in modulating neuronal excitability. - It works by binding to the **α2δ subunit of voltage-gated calcium channels**, reducing calcium influx and thereby decreasing the release of excitatory neurotransmitters involved in pain signaling. *Acetaminophen* - **Acetaminophen** is primarily an analgesic and antipyretic, effective for mild to moderate non-neuropathic pain. - It has no significant efficacy against **neuropathic pain**, which involves distinct neurobiological mechanisms. *Tramadol* - **Tramadol** is an opioid analgesic with some serotonin and norepinephrine reuptake inhibition, offering moderate pain relief. - While it can be used for moderate to severe pain, it is generally considered a **second-line agent** for neuropathic pain due to its opioid nature and potential side effects. *Aspirin* - **Aspirin** is a nonsteroidal anti-inflammatory drug (NSAID) primarily used for its anti-inflammatory, analgesic, and antiplatelet effects. - It is **ineffective for neuropathic pain**, which does not typically involve peripheral inflammation as its primary mechanism.
Question 6: Which type of pain is characterized by unknown etiology?
- A. Nociceptive pain
- B. Neuropathic pain
- C. Idiopathic pain (Correct Answer)
- D. Inflammatory pain
Explanation: ***Idiopathic pain*** - This term refers to pain where the **underlying cause** or pathology cannot be identified, despite thorough investigation. - It signifies that the **etiology is unknown**, fitting the description in the question directly. *Nociceptive pain* - This type of pain arises from the activation of **nociceptors** due to actual or threatened tissue damage. - Its etiology is typically clear, involving an injury, inflammation, or mechanical stress. *Neuropathic pain* - This pain results from damage or disease affecting the **somatosensory nervous system**. - The etiology is known to be nerve damage or dysfunction, not an unknown origin. *Inflammatory pain* - This pain is driven by the inflammatory process, involving the release of **pro-inflammatory mediators** at the site of tissue injury or infection. - The cause is directly linked to inflammation, making its etiology known.
Question 7: A patient presents with fatigue and is not gaining weight. The body temperature is warm. What would the investigation likely show?
- A. High TSH with normal T3 and T4
- B. Low TSH with elevated T3 and/or T4 (Correct Answer)
- C. Elevated T4 with suppressed T3
- D. Normal TSH with low T3 and T4
Explanation: **Low TSH with elevated T3 and/or T4** - **Fatigue** not gaining weight, and a **warm body temperature** are classic symptoms of **hyperthyroidism** [1]. - In hyperthyroidism, the thyroid gland overproduces T3 and T4, leading to a compensatory **decrease in TSH** from the pituitary gland [1]. *High TSH with normal T3 and T4* - This profile, known as **subclinical hypothyroidism**, would typically present with symptoms of reduced metabolism, such as **weight gain** and **cold intolerance**, which contradict the patient's presentation [1]. - While fatigue can be present in hypothyroidism, the **warm body temperature** and lack of weight gain point away from this diagnosis. *Elevated T4 with suppressed T3* - This scenario is uncommon and points towards an issue with the **conversion of T4 to T3**, which is generally not the primary mechanism behind classic hyperthyroidism symptoms. - In most hyperthyroid states, both T3 and T4 levels are elevated, or T3 elevation is more predominant, reflecting increased thyroid hormone production. *Normal TSH with low T3 and T4* - This pattern is inconsistent with normal thyroid function and does not fit the typical presentation of either hyperthyroidism or hypothyroidism. - **Low T3 and T4** with normal TSH could indicate **central hypothyroidism**, but this would typically present with hypothyroid symptoms like weight gain and cold intolerance, not a warm body temperature [1].
Question 8: What is the primary mechanism underlying hyperthermia?
- A. Temperature > 40°C with autonomic dysfunction
- B. Failure of thermoregulation (Correct Answer)
- C. Temperature > 41.5°C
- D. No change in hypothalamic set point
Explanation: ***Failure of thermoregulation*** - **Hyperthermia** is fundamentally caused by the body's inability to dissipate heat effectively, leading to an uncontrolled rise in core body temperature. - This differentiates it from fever, where the **hypothalamic set point** is elevated, and the body actively tries to reach that higher temperature. *Temperature > 41.5°C* - While a temperature exceeding **41.5°C** is often seen in severe hyperthermia, it is a *consequence* of the failure of thermoregulation, not its primary cause. - This extreme temperature indicates a critical state, but the underlying problem is the body's inability to control internal heat. *Temperature > 40°C with autonomic dysfunction* - A temperature above **40°C** combined with **autonomic dysfunction** (e.g., altered mental status, seizures) describes a severe *manifestation* of hyperthermia, often seen in heat stroke. - This is a symptom complex resulting from, rather than the primary cause of, the body's thermoregulatory failure. *No change in hypothalamic set point* - This statement is a *characteristic* of hyperthermia, distinguishing it from fever, where the **hypothalamic set point** is elevated. - However, the *absence* of this change is not the primary cause; rather, the underlying issue is the body's inability to manage its heat load despite a normal set point.
Question 9: Which of the following conditions is least likely to cause multiple painful ulcers on the tongue?
- A. TB
- B. Herpes
- C. Behcet disease
- D. Sarcoidosis (Correct Answer)
Explanation: ***Sarcoidosis*** - While sarcoidosis can affect any organ, **oral involvement is rare** and typically presents as **nodules, plaques, or generalized swelling**, not usually multiple painful ulcers on the tongue. - The lesions, when they occur, are often **painless** and appear as submucosal nodules, red patches, or diffuse swelling. *TB* - Oral tuberculosis can present as **multiple painful ulcers** on the tongue, often with a **granulomatous appearance** mimicking squamous cell carcinoma. - These ulcers are typically **irregular, undermined, and persistent**, often associated with pulmonary TB. *Herpes* - **Herpes simplex virus (HSV)** infection, particularly primary herpetic gingivostomatitis, commonly causes **multiple painful ulcers** on the tongue, gums, and other oral mucosa. - These ulcers begin as vesicles that **rupture to form painful erosions** and are a classic presentation of oral herpes. *Behcet disease* - **Oral aphthous ulcers** are a hallmark feature of Behcet disease, commonly presenting as **multiple, recurrent, painful ulcers** on the tongue and other oral mucosal surfaces. - These ulcers are clinically indistinguishable from common aphthous stomatitis but are more frequent and often associated with genital ulcers, skin lesions, and ocular inflammation.
Question 10: A 25-year-old woman presents with intermittent double vision and fatigue. Her symptoms are worse at the end of the day. She reports no other focal muscle weakness or sensory symptoms. On examination her eye movements, motor strength, and reflexes in the upper and lower limbs are normal. Repetitive handgrip exercises cause loss of strength in the grip. A CXR reveals an anterior mediastinal mass. Which of the following is the most likely diagnosis of the anterior mediastinal mass?
- A. lymphoma
- B. teratoma
- C. thymoma (Correct Answer)
- D. thyroid
Explanation: ***thymoma*** - The patient's symptoms of **intermittent double vision** and **fatigue, worsening at the end of the day**, are highly suggestive of **myasthenia gravis** [1]. - Approximately 15-20% of patients with myasthenia gravis have a **thymoma**, which is typically found as an **anterior mediastinal mass** on CXR [2]. *lymphoma* - While lymphoma can present as an anterior mediastinal mass, it is not typically associated with the specific neurological symptoms of **myasthenia gravis**. - Lymphoma often presents with systemic symptoms like **fever, night sweats, and weight loss**, which are not described here. *teratoma* - A teratoma is a germ cell tumor that can occur in the anterior mediastinum but does not typically cause **neuromuscular symptoms** like those seen in myasthenia gravis. - They can sometimes be associated with paraneoplastic syndromes, but not usually with symptoms directly pointing to **acetylcholine receptor antibodies** [2]. *thyroid* - An ectopic thyroid gland or thyroid mass in the mediastinum is rare and would not explain the patient's **myasthenic symptoms** [2]. - Thyroid masses are usually asymptomatic unless they cause **compression symptoms** or are hormonally active.
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