Dr. Jay Thaddeus 🩺

🧑‍💼MBBS|| A General Practitioner, Now a Surgery Resident
📚 Daily Cases & High Yield Pearls
🩺 Daily Health Tips
📌 Not a prescription, consult your doctor

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

USMLE HIGH YIELD

📍Why does smoking improve ulcerative colitis?

This is a very important USMLE concept and usmle frequently test this case. There are two types of inflammatory bowel diseases Ulcerative colitis and Chron's disease.
In Ulcerative colitis, inflammation is limited only to the superficial layers of the bowel wall Including mucosa and sub mucosa, whereas in Chron's disease inflammation is transmural and it involves the entire thickness of the bowel and secondly, it can affect any part of the Bowel starting from the mouth to anus.
But why do smoking improves this sort of information, specifically ulcerative colitis??
Nicotine in smoking actually stimulates mucus production in the bowel and this will coat the mucosa and submucosa of the bowel in Ulcerative colitis and act as a barrier from the luminal content.
Luminal contents cannot directly act on the damaged or affected sites on the bowel because of that extra mucus produced by the nicotine.
So,This way, secondarily, nicotine itself has anti inflammatory properties and it reduces cytokine production and it dampens the immune response.

Whereas in chron's disease,This effect of the nicotine is not helpful. Rather it increases the disease severity. Why? Because The inflammation is transmural and there is deeper level of immune dysregulation and nicotine cannot help it and it actually increases the frequency of chron's flares as well as the need for surgery. And so nicotine is not that much effective or that much protective in case of chrons disease.

And the usmle test this. there will be a scenario about the patient who has inflammatory bowel disease and he smokes and now the question will ask about the disease caused or prognosis. And if the patient has Ulcerative colitis, obviously smoking is protective and it reduces Disease influence.
But in chron's disease, smoking actually worsens everything. So this is really important.
keep in mind that despite its beneficial effects we do not advocate that patients with Ulcerative colitis should start smoking because of.risk of cardiovascular as well as cancer risk of nicotine and smoking far outweighs the beneficial effects on the gastrointestinal tract.

However It can be used as an adjunct therapy and I have just explained why because of its beneficial effect inpatient with Ulcerative colitis.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

@chiemezuo27576 Excellent 👍

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

After a blunt abdominal trauma the patient complains of left shoulder tip pain.
Which sign is this?

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Omeprazole inhibits the liver enzyme CYP2C19, which prevents clopidogrel from converting into its active form and reduces its antiplatelet efficacy.

Mechanism: Clopidogrel is a prodrug that requires activation by the hepatic CYP2C19 enzyme to exert its antiplatelet effect. Omeprazole is a potent inhibitor of CYP2C19.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

1. Inherited / Genetic Disorders

Abetalipoproteinemia (Bassen-Kornzweig Syndrome): Absence of apolipoprotein B-containing lipoproteins, causing severely low serum cholesterol and triglycerides.

Tangier Disease: Severe deficiency of high-density lipoprotein (HDL) and apolipoprotein A-I due to ABCA1 gene mutations.

Hypobetalipoproteinemia: Genetic disorder characterized by low levels of apolipoprotein B and low LDL cholesterol.

Smith-Lemli-Opitz Syndrome: An inborn error of cholesterol synthesis caused by mutations in the DHCR7 gene.

Lecithin-Cholesterol Acyltransferase (LCAT) Deficiency: Impaired cholesterol esterification leading to marked reductions in HDL and unesterified cholesterol accumulation.

2. Endocrine & Metabolic Conditions
Hyperthyroidism (Thyrotoxicosis): Excess thyroid hormones increase LDL receptor expression and clearance, significantly lowering total and LDL cholesterol.
Adrenal Insufficiency (Addison's Disease): Impaired lipid metabolism and overall endocrine dysregulation can cause low serum lipids.

3. Liver & Malabsorption Disorders
Severe Liver Dysfunction / Cirrhosis: Impaired hepatic synthesis of cholesterol and apolipoproteins.
Malabsorption Disorders (e.g., Celiac Disease, Short Bowel Syndrome): Inadequate intestinal absorption of dietary lipids and fat-soluble vitamins.

4. Chronic Infections & Inflammatory States
Chronic Infections: Infections such as Hepatitis C, Tuberculosis, and HIV/AIDS are frequently linked to lower circulating cholesterol.
Sepsis & Critical Illness: Acute-phase inflammatory responses lead to rapid reductions in serum cholesterol levels.
Malignancies: Certain cancers (e.g., hematologic malignancies, advanced solid tumors) due to increased cholesterol utilization by rapidly dividing tumor cells and cytokine-driven systemic inflammation.

5. Nutritional Factors
Severe Malnutrition / Anorexia Nervosa: Insufficient intake of lipid precursors and essential nutrients.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

1. Inherited / Genetic Disorders

Abetalipoproteinemia (Bassen-Kornzweig Syndrome): Absence of apolipoprotein B-containing lipoproteins, causing severely low serum cholesterol and triglycerides.

Tangier Disease: Severe deficiency of high-density lipoprotein (HDL) and apolipoprotein A-I due to ABCA1 gene mutations.

Hypobetalipoproteinemia: Genetic disorder characterized by low levels of apolipoprotein B and low LDL cholesterol.

Smith-Lemli-Opitz Syndrome: An inborn error of cholesterol synthesis caused by mutations in the DHCR7 gene.

Lecithin-Cholesterol Acyltransferase (LCAT) Deficiency: Impaired cholesterol esterification leading to marked reductions in HDL and unesterified cholesterol accumulation.

2. Endocrine & Metabolic Conditions
Hyperthyroidism (Thyrotoxicosis): Excess thyroid hormones increase LDL receptor expression and clearance, significantly lowering total and LDL cholesterol.
Adrenal Insufficiency (Addison's Disease): Impaired lipid metabolism and overall endocrine dysregulation can cause low serum lipids.

3. Liver & Malabsorption Disorders
Severe Liver Dysfunction / Cirrhosis: Impaired hepatic synthesis of cholesterol and apolipoproteins.
Malabsorption Disorders (e.g., Celiac Disease, Short Bowel Syndrome): Inadequate intestinal absorption of dietary lipids and fat-soluble vitamins.

4. Chronic Infections & Inflammatory States
Chronic Infections: Infections such as Hepatitis C, Tuberculosis, and HIV/AIDS are frequently linked to lower circulating cholesterol.
Sepsis & Critical Illness: Acute-phase inflammatory responses lead to rapid reductions in serum cholesterol levels.
Malignancies: Certain cancers (e.g., hematologic malignancies, advanced solid tumors) due to increased cholesterol utilization by rapidly dividing tumor cells and cytokine-driven systemic inflammation.

5. Nutritional Factors
Severe Malnutrition / Anorexia Nervosa: Insufficient intake of lipid precursors and essential nutrients.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

@Mikaelhemsworth Excellent illustration

[Iam.helios_theiason @Mikaelhemsworth]

C) Digoxin.

Digoxin is a cardiac glycoside used for heart failure that can cause xanthopsia (yellow-tinted vision), a classic sign of toxicity due to its narrow therapeutic index.

The other choices (furosemide, spironolactone, metoprolol) are core heart failure medications but

[Doctor Med @DoctorMed0]

The correct answer is D) Arrhythmias (specifically, cardiac arrhythmias resulting from digitalis toxicity).
Explanation
Most Severe & Dangerous Adverse Effect: While digoxin causes various side effects (including gastrointestinal upset and visual disturbances like xanthopsia), cardiac arrhythmias are its most serious, main, and potential life-threatening adverse effect.
Mechanism: Digoxin inhibits the \text{Na}^+/\text{K}^+-ATPase pump, leading to increased intracellular calcium (\text{Ca}^{2+}). Excess calcium causes delayed afterdepolarizations (DADs), which can trigger a wide variety of rhythm disturbances.
Types of Arrhythmias Caused:
Ventricular arrhythmias (e.g., ventricular premature contractions [VPCs], ventricular tachycardia, ventricular fibrillation).
Atrial tachycardia with AV block (highly characteristic of digoxin toxicity).
AV nodal block and junctional rhythms.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

@chiemezuo27576 C.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

@Mikaelhemsworth Excellent 👍

[Iam.helios_theiason @Mikaelhemsworth]

ACE inhibitors (e.g., enalapril, lisinopril, ramipril) decrease aldosterone secretion, reducing potassium excretion by the kidneys and potentially causing hyperkalemia.

[Iam.helios_theiason @Mikaelhemsworth]

C. Dorsal recumbent position

* Dorsal recumbent position (along with its modified form, the lithotomy position) is the standard and most widely used position for normal spontaneous vaginal delivery in clinical settings.
* It allows optimal access to the birth canal and

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Macrolides: Erythromycin, clarithromycin, and azithromycin. (Erythromycin and clarithromycin carry the highest risk due to potent delayed-rectifier potassium current (I_{Kr}) blockade and hepatic CYP3A4 inhibition).

Fluoroquinolones: Moxifloxacin, levofloxacin, and ciprofloxacin. (Moxifloxacin has the strongest QT-prolonging effect among the commonly used fluoroquinolones).

Other Antimicrobials: Azole antifungals (e.g., fluconazole, ketoconazole), antimalarials (e.g., chloroquine, quinine, halofantrine), and pentamidine.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

@Giovanna_Rave Bye

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Anonychia can also occur alone or as part of some other syndromes.

1. Nail-Patella Syndrome (Hereditary Onycho-Osteodystrophy): Characterized by absent or hypoplastic nails (most severe on thumbs), absent/hypoplastic patellae, iliac horns, and renal or ocular abnormalities.

2. Coffin-Siris Syndrome: Features nail/terminal phalangeal hypoplasia or anonychia (especially of the 5th digit), developmental delay, coarse facial features, and hypertrichosis.

3. DOORS Syndrome: A rare genetic condition characterized by Deafness, Onychodystrophy/anonychia, Osteodystrophy, Retardation (developmental delay), and Seizures.

4.Iso-Kikuchi Syndrome (Congenital Onychodysplasia of the Index Fingers): Involves anonychia or nail dysplasia limited specifically to the index fingers, often accompanied by underlying bone abnormalities.

5. Ectodermal Dysplasias: A group of genetic disorders affecting ectodermal structures, leading to anonychia alongside sparse hair, abnormal teeth, and reduced sweating.

6. Acro-Dermato-Ungual Syndromes / Cook's Syndrome: Associated with bilateral absence or hypoplasia of nails on hands and feet along with distal digit malformations.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

The thyroid malignancy with the worst prognosis worldwide is:
A. Papillary carcinoma
B. Follicular carcinoma
C. Anaplastic carcinoma
D. Medullary carcinoma
E. Secondary (metastatic) malignancy of the thyroid

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

A 21 yr old presented with a 1 year history of multiple sharply demarcated erythematous Annular plaques with an advancing scaly border, central clearing and satellite papules.
There's positive history of itching with fine scaling.
Investigation is shown on the image.
What is the Diagnosis ❔❔

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Liposuction is a surgical procedure that uses a suction technique to remove fat from specific areas of the body.

Targeted Layer:
the metal cannula is inserted into the subcutaneous adipose tissue layer beneath the skin to break up and suction out localized fat deposits.

Common Areas:
Frequently performed on the abdomen, hips, thighs, buttocks, arms, and neck.

Purpose:
It is primarily used for body contouring and reshaping rather than as an overall weight-loss method or substitute for proper diet and exercise.

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Thoracentesis
(also known as a pleural tap)
is the medical procedure depicted in the video.
It involves inserting a needle or small tube through the chest wall into the pleural space to drain excess fluid (pleural effusion) collected around the lungs. Watch video and see howbit is done

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Say No to Smoking

[Dr. Jay Thaddeus 🩺 @Jay_thadeus]

Which drug is a potassium-sparing diuretic used in heart failure management?

A) Hydrochlorothiazide
B) Furosemide
C) Spironolactone
D) Bumetanide