Patient Information
The patient was a nine-year-old Igbo boy from Abakpa Nike, Enugu State, Nigeria, who presented to the Department of Hematology and Oncology on 1 July 2025 with a three-day history of weakness and fever. He had been previously diagnosed with sickle cell anemia (HbSS genotype) one year earlier following an episode of cerebrovascular accident (CVA) managed at the University of Nigeria Teaching Hospital, Enugu. He is the first of three children in a monogamous family. His mother had been absent for three months prior to presentation, and he lived under the care of his paternal aunt, aged 43 years, who was a trader. His father, aged 35 years, worked with the Public Complaints Commission and provided intermittent support. The family’s socioeconomic background was modest, and the child was enrolled in a local primary school prior to his illness. There was no known family history of hematologic disorders or stroke, and immunization status was reportedly up to date. The patient had not been on routine follow-up at the sickle cell clinic at the time of presentation.
Clinical Findings on Initial Presentation
At presentation, the patient’s primary complaints were generalized weakness and intermittent low-grade fever for three days. The progressive weakness limited daily activity; the patient spent most of the day lying down. The fever was described as on and off, with partial relief after administration of paracetamol. There was no initial history of seizures at initial presentation. On physical examination, the patient appeared pale, mildly febrile (37.7°C), and warm to touch, with no signs of dehydration or respiratory distress. His weight was 26 kg, and vital signs were otherwise within acceptable limits for age. There was no cyanosis or jaundice at the time of admission. Neurological examination revealed that the patient was conscious and alert, with Glasgow Coma Scale (GCS) of 15/15. Pupils were equal and reactive to light. There was hypertonia of the left upper and lower limbs, while the right limbs demonstrated normal tone. Ankle clonus was present on the left side. Deep tendon reflexes were brisk on the left and normal on the right. There was no cranial nerve deficit noted at this stage, and sensation was intact. Systemic examination findings were otherwise unremarkable: respiratory examination showed good bilateral air entry without adventitious sounds, and the abdomen was soft with mild epigastric tenderness but no organomegaly. Cardiovascular and musculoskeletal examinations were within normal limits. In summary, the initial clinical impression was that of a known sickle cell anemia patient presenting with left-sided upper motor neuron signs following a suspected recurrent cerebrovascular event.
Early Admission Phase (1–2 July 2025)
Initial evaluation revealed mild anemia and hypertonia of the left limbs. He commenced routine hematologic care, and exchange blood transfusion (EBT) was planned to optimize oxygen-carrying capacity. However, approximately 20 minutes into the EBT, the child developed severe abdominal pain, restlessness, and generalized tonic seizures, followed by loss of consciousness and absent peripheral pulses. Immediate resuscitation was instituted with intravenous adrenaline, hydrocortisone, and diazepam, followed by intravenous phenobarbital to abort status epilepticus. After 10 seizure episodes, his GCS dropped to 7/15, prompting transfer to the Pediatric Intensive Care Unit (PICU) for advanced monitoring.
Intermediate Course (3–8 July 2025)
In the PICU, he remained unconscious (GCS 10/15), with sluggish pupillary reaction and intermittent tonic seizures involving the right upper and lower limbs. Laboratory investigations revealed hypokalemia (K⁺ 2.9 mmol/L), which was corrected with intravenous potassium chloride infusion. Despite stabilization, he developed recurrent febrile spikes and required antibiotic therapy with intravenous ceftriaxone, antipyretics, and tepid sponging.
Neurological Imaging and Progression (9–12 July 2025)
A cranial CT scan demonstrated a large subacute ischemic infarct in the left frontal lobe and a chronic infarct involving the right frontal, parietal, and temporal lobes with cystic encephalomalacia, dystrophic calcification, and cortical atrophy, consistent with bilateral cerebrovascular accident. The patient’s condition further deteriorated with increasing respiratory distress, jaundice, and hepatomegaly.
Late Course (13–31 July 2025)
Between 13 and 31 July, the child experienced recurrent seizures, despite anticonvulsant therapy with carbamazepine and diazepam. Physiotherapy commenced on 19 July, focusing on pain relief, spasticity reduction, and maintenance of joint range. At this time, he exhibited spasticity of both upper limbs and the left lower limb, tightness of the right tendoachilles, and marked functional dependency. Over six therapy sessions, the patient showed slight improvement in tone and ankle clonus but remained quadriparetic and unable to perform basic activities of daily living. On 31 July 2025, the caregiver requested discharge. The patient was referred to the Pediatric Physiotherapy Outpatient Unit for continued rehabilitation, with follow-up scheduled for 12 August 2025, see Table 1.
Table 1
Summary Timeline of Clinical Course
Date | Event / Review | Clinical Findings | Interventions / Actions | Impression / Remarks |
|---|
1 July 2025 | Admission to Hematology/Oncology Unit | Weakness ×3 days, low-grade fever; pale, mildly febrile (37.7°C); hypertonia of left UL & LL; ankle clonus + on left | Baseline assessment; plan for exchange blood transfusion (EBT) | Recurrent CVA in a known SCA patient |
2 July 2025 | During EBT | Developed abdominal pain → generalized tonic seizure → unresponsive (GCS 3/15), absent peripheral pulse | IV adrenaline, IV hydrocortisone, IV diazepam; seizure persisted → IV phenobarbital; urgent RBC 236 mg/dL | Status epilepticus; post-ictal state; possible transfusion reaction |
3 July 2025 | Head of Ward Review (HOWR) | Unconscious, GCS 10/15; pupils mid-sized, sluggish reaction | Continued PICU care | Repeated CVA; ? transfusion-induced anaphylactic shock |
4 July 2025 | PICU Review / SROC | Persistent seizures involving right UL & LL; serum K⁺ = 2.9 mmol/L | 4.5 mmol IV KCl infused over 2 hours | Hypokalemia corrected; continue anticonvulsants |
5–6 July 2025 | Ongoing management | Febrile spikes (37.8–38.2°C) | Paracetamol, tepid sponging | Supportive therapy |
7 July 2025 | Pediatric Neurology Review | Still unconscious (GCS 10/15); seizure 2 days earlier; intermittent tonic seizures | Carbamazepine 100 mg, IV ceftriaxone 200 mg, omega-3, multivitamin, folic acid | Recurrent CVA with seizure disorder |
8 July 2025 | HOWR | Two seizure episodes (30 s each); K⁺ = 4.2 mmol/L; mild tachypnea (38 cpm) | Stopped KCl; continued IV ceftriaxone, PCM, IV fluids | Seizures controlled; mild respiratory distress |
9–11 July 2025 | Radiological evaluation | — | — | Awaiting CT scan |
12 July 2025 | CT Scan Result | Large subacute ischemic stroke (left frontal lobe); chronic infarcts (right frontal, parietal, temporal); cystic encephalomalacia, cortical atrophy | — | Bilateral cerebrovascular accident confirmed |
13–15 July 2025 | Systemic deterioration | Increasing respiratory distress, jaundice, hepatomegaly, intermittent seizures | O₂ therapy (4–5 L/min), PCM, diclofenac suppository, tepid sponging | Bilateral CVA with jaundice and hepatomegaly |
16 July 2025 | Neurosurgery Review | — | Recommended neurology follow-up and transfusion | Multidisciplinary care |
19 July 2025 | First Physiotherapy Review | Inability to move UL & LL; spasticity of left elbow; TA tight on right; poor grip on left | Soft tissue mobilization (STM), passive movements (PM), stretches, patella mobilization, caregiver education | Quadriparesis secondary to bilateral CVA in SCA |
20 July 2025 | Physiotherapy Ward Round | Unstable; therapeutic positioning and caregiver education only | — | Deferred active therapy |
21 July 2025 | Ophthalmology Review | Unco-operative for dilated fundoscopy | — | Nil contributory findings |
22 July 2025 | HOWR | One seizure (2–3 min) involving left UL; spontaneous abortion | Diazepam 5 mg IV | Recurrent focal seizure |
23 July 2025 | Physiotherapy Session | Impaired speech; trunk stiffness; hypertonia ULs > LLs | Scapular/shoulder mobilization, tonic inhibitory positioning, trunk mobilization, SPS to ULs | Slight tone modulation achieved |
24 July 2025 | HOWR | Three seizures (2 min each); persistent fever, weight loss | Diazepam 5 mg, PCM; continued antibiotics | Ongoing seizure disorder |
25–28 July 2025 | Supportive care | — | Continued anticonvulsants, IV fluids | Clinical stabilization |
29 July 2025 | HOWR | One seizure (3–5 min); stretching of limbs | Diazepam 10 mg IV | Seizure aborted |
31 July 2025 | Discharge request | Generalized hypertonia; no ankle clonus; bilateral synergy patterns; hepatomegaly 6 cm below RCM | Referred for outpatient physiotherapy; continued Keppra, carbamazepine, folic acid, multivitamins | Persistent quadriparesis; follow-up on 12 Aug 2025 |
Laboratory Investigations
Baseline hematologic tests revealed hemoglobin concentration of 7.2 g/dL, packed cell volume (PCV) of 21%, and white blood cell count of 13.6 × 10⁹/L. Hemoglobin electrophoresis confirmed HbSS genotype, with HbS = 84.7%, HbF = 12.2%, and HbA₂ = 3.1%, consistent with sickle cell anemia. Peripheral blood film demonstrated normochromic normocytic red cells with sickled forms. Biochemical analyses showed mild hypokalemia (K⁺ = 2.9 mmol/L) on the third day of admission, which was corrected with intravenous potassium chloride infusion. Serum sodium (Na⁺ = 137 mmol/L), chloride (Cl⁻ = 101 mmol/L), urea (4.6 mmol/L), and creatinine (0.9 mg/dL) remained within normal limits. Liver enzymes were mildly elevated, with AST = 41 IU/L and ALT = 35 IU/L. Total bilirubin was 2.8 mg/dL, with a mild increase in the conjugated fraction, in keeping with hemolytic jaundice secondary to sickling. Malaria parasite test was negative, and blood culture yielded no growth.
Neuroimaging
A cranial computed tomography (CT) scan performed on 12 July 2025 demonstrated a large subacute ischemic infarct in the left frontal lobe, with loss of gray-white matter differentiation and sulcal effacement. There was also evidence of a chronic infarct involving the right frontal, parietal, and temporal lobes, associated with cystic encephalomalacia, dystrophic calcification, and cortical atrophy. These findings were consistent with a bilateral cerebrovascular accident (CVA) - a rare manifestation in pediatric sickle cell anemia. No intracerebral hemorrhage or space-occupying lesion was identified.
Differential Diagnosis
The primary differential diagnoses considered at presentation included: 1) Recurrent ischemic stroke secondary to sickle cell vasculopathy, supported by the patient’s known HbSS genotype and prior history of CVA. 2) Transfusion-related anaphylactic reaction, given the temporal relationship between exchange transfusion and seizure onset. 3) Metabolic seizure due to electrolyte imbalance, particularly hypokalemia, though this was corrected without full neurological recovery. Infectious causes such as meningitis and cerebral malaria were ruled out as blood culture and malaria parasite tests were negative, and there were no meningeal signs or cerebrospinal fluid abnormalities. Metabolic stroke was also considered but deemed unlikely following correction of electrolyte imbalance without neurological recovery. Hence, the overall clinical, laboratory, and imaging findings supported a diagnosis of bilateral ischemic cerebrovascular accident secondary to sickle cell anemia.
Therapeutic Intervention
The patient underwent comprehensive acute medical and multidisciplinary management following the onset of generalized seizures during exchange transfusion on 2 July 2025. Emergency resuscitation with intravenous adrenaline, hydrocortisone, diazepam, and phenobarbital successfully controlled the status epilepticus after multiple episodes. Maintenance anticonvulsants (carbamazepine and levetiracetam) were instituted alongside oxygen therapy, intravenous ceftriaxone, and antipyretics. Hypokalemia (2.9 mmol/L) was promptly corrected with intravenous potassium chloride, and nutritional supplementation with folic acid, omega-3 fatty acids, and multivitamins was provided. Despite stabilization, the patient developed recurrent low-grade fever, hepatomegaly, and jaundice, prompting continued input from pediatric neurology, neurosurgery, and intensive care teams to guide neuroprotective management.
Physiotherapy was initiated on 19 July 2025, two weeks after admission, focusing on tone reduction, maintenance of joint mobility, and caregiver education for home-based care. Interventions included positioning, passive and assisted range-of-motion exercises, soft tissue mobilization, tonic inhibitory techniques, and trunk mobilization for postural control. Six physiotherapy sessions were completed between 19 and 29 July, limited by intermittent medical instability and recurrent seizures. By discharge on 31 July 2025, the patient demonstrated mild improvement in upper limb tone, resolution of ankle clonus, and preserved joint mobility but remained quadriparetic. A structured home exercise program and outpatient follow-up were prescribed to continue neurorehabilitation and support functional recovery see Table 2.
Table 2
Summary of Therapeutic Interventions and Clinical Response
Phase | Date | Interventions | Clinical Response / Outcome |
|---|
Acute Phase | 2 July 2025 | Exchange transfusion → seizures, loss of consciousness | Resuscitated with IV adrenaline, hydrocortisone, diazepam; transferred to PICU |
3–6 July 2025 | IV phenobarbital, oral carbamazepine, potassium correction | Seizure frequency reduced; vital signs stabilized |
7–12 July 2025 | IV ceftriaxone, PCM, O₂ therapy, hydration, nutritional support | Fever resolved; hepatomegaly noted; CT pending |
12 July 2025 | CT confirmed bilateral ischemic infarcts | Final diagnosis established; physiotherapy consult requested |
Rehabilitation Phase | 19 July 2025 | Initial physiotherapy evaluation and caregiver training | Hypertonia and tight tendo-Achilles identified; poor grip; dependent for ADLs |
20 July 2025 | Positioning, STM, passive ROM, stretches | Tone slightly reduced; tolerated partially |
23 July 2025 | Scapular/shoulder mobilization, trunk mobility, tonic inhibitory positioning | Improved relaxation; decreased upper-limb tone |
24 July 2025 | Patella mobilization, ROM to lower limbs, continued STM | Mild improvement in joint mobility |
26 July 2025 | Reinforcement of caregiver home routine | Caregiver demonstrated correct positioning and ROM |
29 July 2025 | Review session; medical instability recurred | Minimal functional progress; spasticity persisted |
Discharge Phase | 31 July 2025 | Home exercise program and outpatient referral | Conscious, quadriparetic; referred for continued neurorehabilitation |
Baseline vs. Discharge Functional Status
This case underscores the intricate challenges of managing bilateral cerebrovascular accident in pediatric sickle cell anemia, a rare but devastating complication. The integration of timely medical stabilization with early physiotherapy intervention yielded measurable improvement in tone, range of motion, and seizure control within a constrained clinical window. Though gross motor recovery remained limited due to recurrent seizures and systemic instability, the physiotherapy program achieved crucial secondary prevention goals including contracture avoidance, maintenance of joint mobility, and caregiver empowerment. These outcomes reflect the potential of multidisciplinary, context-sensitive rehabilitation in improving survival quality for children with complex sickle cell neurologic complications see Table 3.
Table 3
Baseline vs Discharge Physiotherapy Assessment
Parameter | Baseline (19 July 2025) | At Discharge (31 July 2025) |
|---|
Level of consciousness | Drowsy; intermittent response (GCS 12/15) | Fully conscious; alert and interactive |
Tone | Global hypertonia (ULs > LLs) | Mild reduction in UL tone; generalized spasticity persists |
Ankle clonus | Present on left | Absent bilaterally |
ROM (Elbow/Wrist) | Limited and painful | Mildly improved; less discomfort |
Grip strength | Poor on left, fair on right | Fair bilaterally |
Functional ability | Unable to roll, sit, or perform ADLs | Partial head/trunk control; dependent for mobility |
Seizure frequency | Recurrent (≥ 10 episodes/day) | Nil in last 72 hours before discharge |
Hepatomegaly | 4 cm below RCM | 6 cm below RCM, non-tender |
Overall impression | Unstable, quadriparetic | Stable, quadriparetic, improved tone and responsiveness |