Presenting History

When evaluating a pediatric patient with suspected Tubercular Meningitis (TBM) or chronic meningoencephalitis, obtain an exhaustive chronological account of symptoms. TBM classically evolves across distinct clinical stages (prodromal, meningitic, and paralytic/encephalitic).

Fever: Inquire about the duration (typically subacute/chronic >2 weeks), grade (low-to-moderate grade), and pattern (classical evening rise of temperature with night sweats).
Headache & Vomiting (Raised Intracranial Pressure): Ask if the headache is generalized, worse in the early morning, aggravated by coughing/straining, and whether vomiting is effortless/projectile and not preceded by nausea.
Altered Sensorium & Behavioral Changes: Inquire about apathy, excessive irritability, lethargy, loss of interest in surroundings, daytime drowsiness, nocturnal wakefulness, or progressive deterioration in school performance and consciousness.
Abnormal Body Movements & Seizures: Inquire about the onset of convulsions (focal motor vs generalized tonic-clonic; note that early focal seizures in TBM indicate focal ischemia/tuberculoma or cortical vasculitis). Inquire about involuntary movements (chorea, hemiballismus, tremors, or dystonia due to basal ganglia tubercular vasculitis).
Focal Neurological Deficits: Ask about sudden weakness of one side of the body (hemiplegia/hemiparesis due to middle cerebral artery territory infarction/endarteritis) or abnormal gait and foot dragging.
Cranial Nerve Symptoms (Basal Exudates):
- CN II, III, IV, VI: Inquire about blurring of vision, inability to see, double vision (diplopia), or inward turning of the eye (squint).
- CN VII: Inquire about deviation of mouth while crying or smiling, food collecting in the cheek, or dribbling of saliva from the angle of the mouth.
- CN VIII: Inquire about decreased response to sound or hearing loss.
- CN IX, X, XII: Inquire about difficulty swallowing, choking episodes, nasal regurgitation of milk/fluids, or hoarseness of cry.

Negative History (3C 1D Framework)

Category	Pertinent Negative Question	Rationale / Significance
Causes (Etiology)	History of contact with an adult having chronic cough, hemoptysis, or on anti-tubercular therapy (ATT)?	Household contact with an open smear-positive case is the single strongest clinical clue for childhood tuberculosis.
Causes	History of prior measles infection, varicella, or severe PEM in the past 3 months?	Severe immunosuppressive viral infections or severe undernutrition break down host cell-mediated immunity and reactivate latent TB (Rich focus rupture).
Complaints (Raised ICP / Spine)	History of rapid enlargement of head size, tense fontanelle, or persistent back pain/spinal deformity?	Detects secondary communicating/obstructive hydrocephalus or concurrent spinal tubercular arachnoiditis/Pott's disease.
Complaints (Vasculitis / Infarct)	History of sudden onset focal weakness (arm/leg) or speech arrest following a seizure?	Suggests Tubercular Vasculitis with tubercular ischemic stroke (most commonly Middle Cerebral Artery territory involving internal capsule).
Complications	History of visual loss, squint, or hearing impairment following onset of illness?	Basal exudates entrap optochiasmatic structures (blindness), CN VI (false localizing sign of raised ICP), and CN VIII (sensorineural hearing loss).
Complications	History of polyuria, extreme thirst, or persistent hyponatremia/seizures?	Points to hypothalamic-pituitary axis involvement: Central Diabetes Insipidus or Syndrome of Inappropriate Antidiuretic Hormone (SIADH) / Cerebral Salt Wasting (CSW).
Differentials (Mimics)	History of high-grade fever with rapid coma onset in <48 hours, or ear discharge/pyoderma?	Points towards Acute Pyogenic/Bacterial Meningitis or Otogenic Brain Abscess rather than subacute TBM.
Differentials	History of petechial/purpuric skin rash, bleeding manifestations, or joint swelling?	Rules out meningococcemia, systemic vasculitis, or infective endocarditis with septic emboli.
Differentials	History of fever with rapid neuroregression, myoclonic jerks, or choreoathetosis without meningeal signs?	Suggests Subacute Sclerosing Panencephalitis (SSPE) or Inborn Errors of Metabolism.

Other Relevant History

Antenatal & Birth History: Document maternal health, antenatal fever, maternal TB during pregnancy (congenital TB), gestational age, and birth weight.
Developmental History: Assess all four domains (Gross motor, Fine motor, Language, Social). Look specifically for arrest or regression of developmental milestones correlating with the onset of raised ICP and encephalopathy.
Immunization History: Document BCG vaccination at birth. Check for the presence of a BCG scar over the left deltoid. Note: BCG vaccine reduces the risk of severe disseminated TB and TBM by ~70-80%, but does not confer 100% protection.
Dietary History: Calculate exact daily calorie and protein intake via 24-hour dietary recall. Calculate deficit against the ideal body weight for age. Severe protein energy malnutrition (PEM) is a major risk factor and adverse prognostic indicator in TBM.
Socioeconomic & Environmental History: Assess via modified Kuppuswamy scale. Inquire about overcrowding, poorly ventilated living quarters, smoking in the household, and tuberculosis in neighbors or caregivers.
Treatment History: Exact details of any prior antibiotics, antipyretics, antiepileptic drugs, steroids, or prior courses of ATT (including duration, compliance, and red-orange urine discoloration with rifampicin).

History Summary

Spoken Formulation: History Summary

"I would like to summarize the history of this Age in months / years old Male / Female child, Birth order order child of Consanguineous / Non-consanguineous parentage from Geographic Location, who presented with subacute onset low-to-moderate grade fever with evening rise of Duration in weeks, progressive headache, vomiting, and altered sensorium of Duration in days, with clinical features suggestive of raised intracranial pressure and focal neurological deficits.

In view of the subacute insidious onset, contact history with active pulmonary tuberculosis, unimmunized BCG status, and absence of acute catastrophic neurodeficit, I would like to think of a Chronic Meningoencephalitis, probably Tubercular Meningitis (TBM) Stage 1 / 2 / 3, complicated by Hydrocephalus / Focal Infarct / Cranial Nerve Palsy, with underlying Nutritional Status / PEM Grade."

General & Head-to-Toe Examination

Pre-Examination Child Behavioral State

Child State: Document child's level of consciousness and state (Prechtl State 3: quiet wakeful, State 4: agitated/irritable, or Comatose/Stuporous).
Glasgow Coma Scale (GCS) / Pediatric GCS: Record eye opening (E), verbal response (V), and motor response (M) out of 15.

Vitals & Anthropometry

Heart Rate: Look for bradycardia (Cushing's triad of raised ICP).
Respiratory Rate & Pattern: Look for irregular/Cheyne-Stokes breathing (brainstem compression).
Blood Pressure: Look for hypertension with wide pulse pressure (Cushing's response).
Temperature & Capillary Refill Time: Document core temperature and peripheral perfusion.
Anthropometry: Weight, Length/Height, Head Circumference, Mid-Upper Arm Circumference (MUAC). Plot against WHO growth standards and classify malnutrition by WHO/Waterlow criteria.

Head-to-Toe Markers

Head & Fontanelle: In infants, palpate the anterior fontanelle for fullness/bulging and widened sutures. Elicit Macewen's sign ("cracked pot sound") on skull percussion in hydrocephalus.
BCG Scar: Inspect the left deltoid for the presence, size, and character of the BCG scar.
Stigmata of Tuberculosis:
- Cutaneous TB / Hypersensitivity: Erythema nodosum, papulonecrotic tuberculides, scrofuloderma, or lichen scrofulosorum.
- Ocular Signs: Phlyctenular conjunctivitis, choroid tubercles on dilated fundoscopy (pathognomonic of hematogenous dissemination), and papilledema.
- Lymphadenopathy: Look for matting, caseation, or discharging sinuses in cervical, axillary, or epitrochlear lymph nodes.
Spine Examination: Inspect and palpate the entire spine for gibbus deformity, localized tenderness, paravertebral spasm, or cold abscess (Pott's spine).
Shunt Examination: If a VP shunt is in situ, assess valve compressibility, reservoir refill, and surgical scar integrity along the neck, chest, and abdomen.

Systemic Examination: Central Nervous System

1. Higher Mental Functions & Meningeal Signs

Consciousness: Alert / Drowsy / Stuporous / Comatose (GCS score).
Orientation & Cognitive Response: Recognition of parents, response to commands, speech output (dysphasia/aphasia).
Signs of Meningeal Irritation:
- Neck Rigidity: Resistance to passive flexion of the neck in the anteroposterior plane.
- Kernig's Sign: Resistance and pain on extending the knee when the hip is flexed at 90°.
- Brudzinski's Neck Sign: Involuntary flexion of hips and knees on passive neck flexion.
- Brudzinski's Symphyseal Sign: Reflex hip flexion and abduction on pressing the pubic symphysis.

2. Cranial Nerves

CN II (Optic): Visual acuity/tracking, pupillary light reflex (direct & consensual), visual fields, and Fundoscopy (papilledema, optic atrophy, or choroid tubercles).
CN III, IV, VI (Extraocular): Ptosis, resting eye deviation, extraocular movements. CN VI palsy is the most common cranial neuropathy in TBM (false localizing sign of raised ICP or direct basal entrapment).
CN V (Trigeminal): Corneal reflex, facial sensations, and jaw clenching. Exaggerated jaw jerk indicates bilateral supranuclear (pseudobulbar) pathology.
CN VII (Facial): Upper vs Lower Motor Neuron facial palsy. Facial symmetry during crying/smiling, forehead wrinkling, and eye closure.
CN VIII (Vestibulocochlear): Response to auditory stimuli; screening for sensorineural hearing loss.
CN IX, X (Glossopharyngeal & Vagus): Palatal movement, uvula deviation, gag reflex, pooling of secretions in the pharynx, and swallow competence.
CN XI (Spinal Accessory): Sternocleidomastoid and trapezius power (head turning and shoulder shrugging).
CN XII (Hypoglossal): Tongue fasciculations, wasting, and deviation on protrusion.

3. Motor System Examination

Bulk: Inspect for generalized wasting (disuse vs cachexia) or focal muscle atrophy.
Tone: Spastic clasp-knife hypertonia vs flaccidity (in early shock/coma). Evaluate axial vs appendicular tone.
Power: Grade 0 to 5 on the MRC scale. Document hemiplegia, paraplegia, or quadriplegia. Distinguish upper limb vs lower limb involvement.
Deep Tendon Reflexes (DTRs): Biceps, Triceps, Supinator, Knee, and Ankle jerks (exaggerated 3+ or 4+ with sustained ankle/patellar clonus).
Superficial Reflexes: Abdominal reflex (absent in pyramidal tract involvement); Plantar response (bilateral extensor / Babinski positive).
Involuntary Movements: Tremors, choreiform movements, dystonic posturing (decorticate / decerebrate posturing in Stage 3).

4. Sensory & Cerebellar System

Sensory System: Pain, light touch, and temperature sensation (where cooperative). Look for a sensory spinal level in cases with tubercular radiculomyelitis.
Cerebellar Signs: Nystagmus, dysmetria, intention tremor, dysdiadochokinesia, and ataxic gait (if ambulant).

5. Other Systems

Respiratory System: Auscultate for crepitations, bronchial breathing (consolidation/primary complex), or decreased air entry (pleural effusion / miliary TB).
Cardiovascular System: Heart rate, murmurs, signs of CCF or pericardial effusion.
Abdomen: Palpate for hepatomegaly, splenomegaly, mesenteric lymph nodes, doughy abdomen (tubercular peritonitis), or ascites.

Final Summary & Diagnosis

Spoken Formulation: Final Presentation

"On examination of this Age in months / years old Male / Female child who is currently Mental State / GCS Score, with stable / unstable vitals, anthropometry suggestive of Normal / Moderate / Severe Acute Malnutrition, general examination reveals Presence / Absence of BCG scar, Presence / Absence of Stigmata of TB / Choroid Tubercles, and systemic examination of the central nervous system reveals:

Positive / Negative signs of meningeal irritation (Neck stiffness, Kernig's, Brudzinski's),
Presence / Absence of cranial nerve involvement (specifically CN VI / VII / III Palsy),
Motor system examination suggestive of Upper Motor Neuron Hemiparesis / Quadriparesis with Hypertonia / Hyperreflexia / Extensor Plantars,

Final Diagnosis: I would formulate my diagnosis as a case of Chronic Meningoencephalitis, clinically consistent with Tubercular Meningitis (TBM) - Modified British Medical Research Council (BMRC) Stage Stage 1 / Stage 2 / Stage 3, with Secondary Hydrocephalus / Left Hemiparesis secondary to Right MCA Territory Tubercular Infarction / CN VI Palsy, with Severe Protein Energy Malnutrition, with No history of regression of milestones prior to acute event."

Staging of Tubercular Meningitis (Modified BMRC Criteria)

Stage	Clinical Features	GCS Score	Neurological Deficits
Stage 1 (Early)	Prodromal symptoms, fever, headache, malaise, irritability; fully conscious.	GCS 15	No focal neurological deficits; no signs of raised ICP.
Stage 2 (Intermediate)	Meningismus, lethargy, signs of raised ICP, cranial nerve palsies, focal motor deficits.	GCS 11–14	Cranial nerve palsies (most commonly CN VI/VII), hemiparesis/monoparesis present.
Stage 3 (Advanced)	Stupor, deep coma, severe raised ICP, decerebrate or decorticate posturing, dense hemiplegia.	GCS ≤ 10	Severe deficits, bilateral pyramidal tract involvement, cranial neuropathies.