স্পেশাল বিসিএস (স্বাস্থ্য)

Reference: Junqueira’s Basic Histology; 14th Edition; Page-438

[Ref. Junqueira 15th] 

Explanation: HIV mainly transmits through Blood transfusion (90%)

Explanation:
Graves’ disease is the most common cause, especially in younger females.
It is an autoimmune condition with TSH receptor-stimulating antibodies.

Conditions with increased ESR

Physiological  
1.Menstruation 
2. Pregnancy 
3. High atmospheric pressure

B. Pathological 
1.Multiple myeloma
2. Malignancy 
3. MI
4. Acute rheumatic fever
5. Rheumatoid arthritis
6. SLE
7. Tuberculosis
8. Severe anemia
9. Hemorrhage

Reference: Davidson 23rd; P-872
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Reference: Davidson 23rd; P-860
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Fever with chill and rigor, Pleuritic chest pain & Cough: Pneumonia

Explanation: Acute coryza is the most common URTI and is usually the result of rhinovirus infection

Adverse effects  Gastrointestinal side-effects in 1%–5%.
 Rare skin reactions (phototoxicity).  Tendinitis and Achilles tendon rupture, especially in older people.  Central nervous system effects (delirium, tremor, dizziness and occasional seizures in 5%–12%), especially in older people.
 Reduces clearance of xanthines and theophyllines, potentially inducing insomnia and increased seizure potential.
 Prolongation of QT interval on ECG, cardiac arrhythmias.  Ciprooxacin use is associated with acquisition of MRSA and strains of C. difcile

Reference: Davidson 23rd; P-365

Explanation:
Permanent cells are cells that have lost the ability to divide (i.e., they are non-proliferative after birth).
Once destroyed, they cannot be replaced through mitosis.
These cells remain in the G₀ phase of the cell cycle permanently.

 Examples of Permanent Cells in the Human Body:
1. Neurons (Nerve cells) – Central nervous system neurons do not divide.
2. Cardiac muscle cells – Myocytes in the heart do not regenerate.
3. Skeletal muscle cells – Multinucleated skeletal muscle fibers are also considered permanent, although satellite cells can aid limited repair.

Glucose level is decreased in acute Pyogenic meningitis

• S. pneumoniae (the pneumococcus) is the most common cause of community-acquired acute pneumonia; the distribution of inflammation is usually lobar.

Reference: Davidson 23rd; P- 1112 (Box-25.55)

Lamina propria is a loose connective tissue

The main test for COPD is spirometry. Spirometry can detect COPD before symptoms are recognized. Your provider may also use the test results to find out how severe your COPD is and help set your treatment goals. Spirometry is a type of lung function test that measures how much air you breathe out.

Stem Breakdown:

Sudden-onset severe headache ("thunderclap" headache), nausea, and vomiting: These are classic symptoms of a subarachnoid hemorrhage (SAH), a life-threatening condition often described as the "worst headache of my life."
Neck stiffness and photophobia: These symptoms suggest meningeal irritation, which occurs when blood irritates the meninges in SAH.
Blood in the subarachnoid space on CT: This confirms the diagnosis of SAH.
Option Analysis:

A) Subarachnoid hemorrhage: This is the correct diagnosis. Davidson and Harrison explain that subarachnoid hemorrhage (SAH) is most commonly caused by the rupture of a cerebral aneurysm, leading to bleeding into the subarachnoid space. The sudden onset of a severe headache, often described as "thunderclap," and the presence of blood on CT are diagnostic of SAH.
B) Migraine headache: Migraine can cause severe headache with nausea and photophobia, but it typically has a gradual onset and is often preceded by an aura. It is not associated with neck stiffness or blood in the subarachnoid space.
C) Meningitis: Meningitis can cause headache, neck stiffness, and photophobia, but it would not cause blood in the subarachnoid space on CT. Lumbar puncture would show infection (e.g., elevated white blood cells in the cerebrospinal fluid).
D) Tension headache: Tension headaches are usually mild to moderate, with a band-like distribution of pain around the head. They are not associated with sudden onset, nausea, vomiting, or blood in the subarachnoid space.

60% of TBW is fluid where 40% is ICF & 20 is ECF

Reference: Davidson 23rd; P-746

Reference: Davidson 23rd; P-440

Explanations:
Monocyte & lymphocyte are mononuclear leukocytes.

Reference: Davidson 23rd; P-607

Ref: Davidson 23rd; P-954, box - 23.40

Spinal cord- Neural tube
Adrenal cortex- Intermediate mesoderm
Ependymal cells- Neural tube

Neuroectoderm derivatives: 
1. Neural Tube: 
   a. Brain
   b. Spinal cord
   c. Neuron
   d. Neuroglia
   e. Ependymal cells

2. Neural Crest:
   a. Craniofacial bones & connective tissue
   b. Dermis in the face and neck
   c. Cranial nerve ganglia
   d. Spinal ganglia
   e. Sympathetic and pre-aortic ganglia
   f. Parasympathetic ganglia of GIT
   g. Glial cell
   h. Schwann cell
   i. C-cells of thyroid gland
   j. Melanocytes
   k. Odontoblast
   l. Adrenal medulla
   m. Leptomeninges (arachnoid & pia matter)
   n. Conotruncal septum in the heart

Acute Kidney Failure After Transfusion Reactions

One of the most lethal effects of transfusion reactions is kidney failure, which can begin within a few minutes to a few hours and continue until the person dies of acute renal failure.

The kidney shutdown seems to have three causes:

1. The antigen-antibody reaction of the transfusion reaction releases toxic substances from the hemolyzing blood that cause powerful renal vasoconstriction

2. Loss of circulating RBCs in the recipient, along with production of toxic substances from the hemolyzed cells and the immune reaction, often. cause circulatory shock. The arterial blood pressure falls very low, and renal blood flow and urine output decrease.

3. If the total amount of free hemoglobin released into the circulating blood is greater than the quantity that can bind with haptoglobin (a plasma protein that binds small amounts of hemoglobin), much of the excess leaks through the glomerular membranes into the kidney tubules.

Explanation :
Features of irreversible cell injury -
Membrane injury
Intracellular release and activation of lysosomal enzyme 
Increase calcium influx
Decreased basophilia
Phagocytosis.

Malingering = intentional exaggeration for external gain (e.g., workers’ compensation). Factitious disorder lacks obvious external incentives.

Stem Breakdown:

Polyuria, polydipsia, and nocturia: These are classic symptoms of diabetes mellitus, indicating hyperglycemia leading to osmotic diuresis.
Fasting blood glucose of 170 mg/dL and haemoglobin A1c of 8.2%: These results confirm persistent hyperglycemia and meet the diagnostic criteria for diabetes mellitus (fasting blood glucose ≥126 mg/dL, A1c ≥6.5%).
Option Analysis:

A) Type 1 diabetes mellitus: Type 1 diabetes usually presents in younger individuals with an acute onset of symptoms (polyuria, weight loss) and often requires insulin from the onset. This patient’s presentation, age, and gradual development of symptoms are more consistent with type 2 diabetes.
B) Type 2 diabetes mellitus: This is the correct diagnosis. Davidson and Harrison explain that type 2 diabetes is the most common form of diabetes, typically occurring in middle-aged or older adults, often with a gradual onset. It is characterised by insulin resistance and relative insulin deficiency, leading to elevated fasting blood glucose and A1c levels.
C) Diabetes insipidus: Diabetes insipidus is characterised by polyuria and polydipsia, but it results from a deficiency of antidiuretic hormone (ADH) or renal insensitivity to ADH. Blood glucose levels would be normal, not elevated.
D) Hyperosmolar hyperglycaemic state (HHS): HHS is a life-threatening complication of type 2 diabetes, characterised by extreme hyperglycemia (>600 mg/dL), dehydration, and altered mental status. The patient in this case has elevated glucose but is not in HHS.

Posterior limb of the internal capsule is supplied by lateral and medial striate arteries. these are end arteries. blockage or hemorrhage of these arteries cause UMN type of paralysis on the opposite side of the body.

Structures piercing the diaphragm: 
1. Greater, lesser, and least splanchnic nerves pass by piercing the crus of diaphragm on the corresponding side
2. Hemiazygos vein pierces the left crus of the diaphragm
3. Left phrenic nerve pierces left cupola

Comedone is a characteristic lesion in acne.

Reference: Davidson 23rd; P-813

Explanation: The foramen cecum on the tongue is the point from which the thyroid gland evaginated and began its journey down into the neck It lies at the apex of the V shape terminal sulcus, which divides the tongue into anterior two-thirds, from the lateral lingual swellings and tuberculum imper and posterior one-third, from the copula.

Ref: Davidson 23rd; P-1003 , box : 24.31

Reference: Junqueira’s Basic Histology; 14th Edition; Page-236

Explanation: According to Bangladeshi legal provisions, 18 years is the age of majority for civil and criminal responsibility. (Ref: Bangladesh Penal Code)

Infection typically leads to the development of delayed hypersensitivity to M. tuberculosis antigens, which can be detected by the tuberculin (PPD, or Mantoux) skin test.

Explanation-
★Ca2+ deficiency (low Ca2+ diet or hypocalcemia) activates 1α-hydroxylase, which catalyzes the conversion of vitamin D to its active form, 1,25-dihydroxycholecalciferol. Increased parathyroid hormone (PTH) and hypophosphatemia also stimulate the enzyme. Chronic renal failure is associated with a constellation of bone diseases, including osteomalacia caused by failure of the diseased renal tissue to produce the active form of vitamin D.
Reference-Vision physiology/9th/P-366/Fig-10.36 & BRS physiology/6th/P-254/Fig-7.14

1^st four are essential

Reference: Davidson 23rd; P-774

Adherent or anchoring junctions, formed by interacting proteins of the cadherin family, are points of strong attachment holding together cells of the epithelium.

Explanations: 1st four clotting factors are regarded as primary clotting factors.

Explanation : Fibrous type of astrocytes play an important role in the formation of blood-brain barrier by sending processes to the blood vessels of brain, particularly the capillaries, forming tight junction with capillary membrane. Tight junction in turn forms the blood-brain barrier.
Ref : Sembulingam 6th edition (Page- 773, 774)

Explanation: Treatment should be continued for 14 days

Most common site of fatty change is liver

Complication of wound healing due to deficient scar formation is wound dehiscence

Horner’s syndrome causes-
Miosis, ptosis, enophthalmos, vasodilation of skin arterioles, loss of sweating on the same side of the face(anhydrosis),loss of ciliospinal reflex.

[Ganong 24th p-569]

Explanation:
Hydroxychloroquine is the mainstay of long-term therapy, reduces flares, and long term survival against SLE.

(Ref : Davidson 23rd ,p-703 )