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HYPOPHOSPHATEMIC RICKETS: CASE REPORT
Marta Liliane de Almeida Maia1, Ana Lucia Santos Abreu2, Paulo Cesar Koch Nogueira2
1Hospital Infantil Darcy Vargas, São Paulo, SP, Brasil.
Insights
Early diagnosis and consistent follow-up are crucial for managing hypophosphatemic rickets. Prompt treatment can prevent severe complications, but neglecting follow-up can lead to significant health deterioration.
Area of Science:
- Pediatrics
- Endocrinology
- Metabolic Bone Disease
Background:
- Hypophosphatemic rickets requires prompt diagnosis and intervention to prevent long-term sequelae.
- Pediatricians must maintain a high index of suspicion for this condition.
Observation:
- A case of hypophosphatemic rickets in a patient with severe initial presentation, including dependence on mechanical ventilation.
- Treatment involved phosphate, calcium, and calcitriol supplementation over 12 months.
- Significant clinical and laboratory improvements were observed, including spontaneous breathing and ambulation.
Findings:
- Treatment led to normalization of calcium, phosphate, magnesium, parathyroid hormone, and alkaline phosphatase levels.
- Patient showed marked improvement in weight and structural development (Z-scores).
- Despite initial recovery, a two-year lapse in follow-up resulted in noticeable health deterioration.
Implications:
- Emphasizes the critical role of early diagnosis and sustained, regular follow-up in managing hypophosphatemic rickets.
- Highlights the potential for severe relapse if treatment adherence and monitoring are compromised.
- Underscores the need for comprehensive patient management strategies in metabolic bone diseases.
Objective:
Early diagnosis and immediate treatment of hypophosphatemic rickets is of utmost importance as it may prevent subsequent sequelae. This report aims at warning pediatricians to consider the presence of the disease.
Case Description:
Description of the metabolic profile, creatinine clearance, nutritional status, weight and body structure of a patient who presented the clinical-laboratorial characteristics of hypophosphatemic rickets and was followed in an outpatient clinic for tubulopathies over the period of 12 months. The patient had been bedridden for some time, was dependent on mechanical ventilation and presented an altered metabolic bone condition. Treatment was phosphate (initial: 65 mg/kg/day and final: 24,2 mg/kg/day), calcium (initial: 127 mg/kg/day, final: 48,4 mg/kg/day) and calcitriol (initial: 0.06 mcg/kg/day, final: 0.03 mcg/kg/day). The patient improved, evolving into spontaneous breathing and walking unaided. Laboratory results: calcium (mg/dL) initial 7.1, final 10.1; phosphate (mg/dL) initial 1.7 final 3.2; magnesium (mg/dL) initial 1.5 final 2.1, parathyroid hormone (pg/l) initial 85.8, final 52.7, alkaline phosphatase (UI/l) initial 12660, final 938; there was also improvement in weight/structural development (Z score: H/A initial: -6.05, final -3.64; W/A: initial -2.92, final -1.57) with presence of transitory gallstones. Creatinine clearance (mL/min/1.73m2bsa) was constant. The medication improved his laboratory results and nutritional status, but the patient did not return for two years for follow-up and, during this period, his condition has noticeably deteriorated.
Comments:
Early diagnosis and follow-up are essential in dealing with this pathology.
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