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Pediatric Endocrinology Diabetes and Metabolism
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Somatotropinowa niedoczynność przysadki jako powikłanie hemofilii – opis przypadku i dane z literatury

Anna M. Kucharska
Paweł Łaguna
Anna Adamowicz-Salach
Ewelina Witkowska-Sędek
Anna Klukowska

Department of Pediatrics and Endocrinology, Warsaw Medical University, Warsaw, Poland
Department of Pediatrics, Oncology and Hematology, Warsaw Medical University, Warsaw, Poland
Pediatr Endocrinol Diabetes Metab 2020; 26 (3): 150–154
Data publikacji online: 2020/07/21
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Severe haemophilia carries an increased risk of life-threatening intracranial haemorrhages (ICH). The incidence of ICH in haemophilic children is estimated at 2.9–12% and is most common in young males, with a peak incidence from the age of 5.9 months to 2 years [1,2]. In the neonatal period the risk of ICH is estimated as 1–4%, and this event is most likely within the first week of life [3]. In the general population the incidence of pituitary disorders after ICH due to traumatic brain injury (TBI) was thought to be low, and the most frequently mentioned transient posterior lobe dysfunction. Diabetes insipidus is estimated to be as frequent as 26% of patients in the acute phase of haemorrhage [4] and 6.9% among long-term survivors [5]. Nevertheless, studies in adult ICH survivors show a relatively high percentage of anterior pituitary hypofunction, ranging from 23% to 69% [6]. Isolated growth hormone deficiency (GHD) is reported as the most frequent ICH/TBI complication. The onset of hypopituitarism is not closely related to the severity of trauma [7]. In most cases it occurs within the first year after TBI, but it might also arise several years after the incident [8–10]. In clinical studies following TBI the incidence of hypopituitarism varies from 15% to 68%, and following subarachnoid haemorrhages (SAH) – from 37.5% to 55% [6, 8]. In haemophilic patients hypopituitarism might be caused by either TBI or spontaneous ICH. Therefore, children with inherited bleeding disorders should be considered as a group with increased risk of acquired hypopituitarism. The aim of this paper is to present the case of GHD as a complication of severe haemophilia.

Case study

A boy was born from 6th pregnancy by physiological 6th delivery, birth weight 2850 g length 50 cm, and Apgar score of 10. The patient’s family history was positive for haemophilia: his two first cousins suffer from haemophilia A; therefore, the boy was investigated soon after birth, and severe haemophilia A was confirmed. In early childhood he underwent four spontaneous intracranial (subarachnoid and subdural) haemorrhages (ICH) – the first in the 5th month of life, the last at the age of three years. The diagnosis of ICH was based on the results of CT, and the extent of the lesion in infancy was monitored using transfontanelle ultrasound. At the age of three years the patient’s height was in the 25th percentile, concordant with parental height position, but for the next few years it steadily decreased. At the age of six years the patient’s height was below the third percentile of male growth (Fig. 1). At this time the patient was diagnosed with chronic hepatitis type B, but liver function was normal and biochemical liver markers were within referral ranges. At the age of seven years a hormonal investigation was performed. The bone age was retarded and was found to be at four years. The concentration of IGF-1 was significantly decreased: 21.5 ng/ml (88–265 ng/ml). In two different stimulatory tests growth hormone (GH) secretion was below normal values (Table I). The function of other pituitary-dependent hormonal axes, i.e. thyroid and adrenal, was normal. Isolated GHD was diagnosed. In MRI scans the pituitary gland was normal, but multifocal changes of the brain tissue with the largest area of injury in posterior cranial fossa were found (Fig. 2). The therapy with recombinant human GH (rhGH) was administered. He started the treatment in the hospital under careful control of any injection. After several days the patient was discharged and continued the treatment at home. He was treated for over nine years with typical doses recommended for GHD children: 0.17–0.2 mg/kg body weight/week. During the treatment the patient’s growth velocity increased, and he achieved normal final height (Fig. 1). Additionally, during the rhGH treatment the body composition improved and lean body mass increased, which facilitated the physical activity of the patient. Under the treatment no complications were observed except sporadic small subcutaneous bleedings after injections. Puberty started at the age of 11 years and progressed normally. The hormonal function of the thyroid gland and adrenals remained within normal values.


In haemophilic children the incidence of ICH is increased and can cause variable complications – neurological deficits, death, and hormonal deficiencies – as late complications. In the study by Kulkarini et al. the highest risk period of ICH was determined as the first month of life (1–4% of neonates) and this event is most likely within the first week of life [3]. Hypopituitarism is defined as deficiency of one or more pituitary hormones of the anterior and/or posterior lobe, and it can be severe or partial. A prospective clinical study three months after TBI or SAH in adult patients in the intensive care unit revealed that severe and partial GHD were the most frequent pituitary defects after TBI, at 25%, and in SAH 25% [11]. Moreover, the GHD is usually the first pituitary deficit to appear [8]. Data regarding the incidence of pituitary disorders after ICH in children is scarce [12, 13]. The most common manifestation of ICH-related pituitary dysfunction is GH deficiency [7]. In the data of worldwide pharmacoepidemiologic databases of children treated with growth hormone [14], hypothalamo-pituitary region injury after SAH was reported only in 0.6% of patients diagnosed with GH deficiency. Additionally, in patients with GH deficiency caused by traumatic brain injury only 38.2% had abnormalities of hypothalamic or pituitary structures detectable in MRI scans [14]. In our patient no demonstrable changes in MRI in hypothalamus or pituitary were found – only multifocal changes disseminated in the brain and a large empty area in the occipital part of the brain (Fig. 2). In the data collected by Kreitschmann-Andermahr [8] and Einaudi [12] isolated GH deficiency was diagnosed in 58.9% of patients after brain injury, and the others had multiple deficiencies of other pituitary-dependent hormonal axes. In our patient the function of thyroid and adrenals was normal. Normal progress of puberty confirmed sufficient secretion of GnRH and gonadotrophins. In adult GH deficiency is manifested by body composition changes, metabolic disturbances, and by psychiatric symptoms, such as depression [15]. In growing children, the most sensitive symptom that facilitates the diagnosis of GHD is decreased growth velocity. Additionally, a typical finding is retarded bone age and low serum insulin-like growth factor 1 (IGF1) and/or insulin-like growth factor binding protein 3 (IGFBP3) [16, 17]. In haemophiliac patients the evaluation of growth can be difficult because of articular deformations and mobility restrictions after frequent joint bleeds [18]. Therefore, short stature can be overlooked in those patients, even under thorough and careful medical control. In Poland a program of prophylactic factor VIII administration was introduced for patients with severe haemophilia A in 2008. Before that time, plasma-derived (pd) factor VIII was administered only as “treatment on demand” by bleeding. The presented patient was 16 years old when the prophylactic program was introduced and had previously had four intracranial bleeds, resulting in growth hormone deficiency. However, subcutaneous rhGH injections each day seemed risky due to possible haemorrhagic complications at the injection site, so we decided to start the treatment in a hospital environment. Despite the lack of prophylactic treatment there was no increase in bleeding into sites after subcutaneous rhGH administration. The therapy was continued safely in an outpatient setting. The course of therapy of our patient shows that the administration of subcutaneous rtGH preparations in haemophilic patients with GH deficiency does not require additional or increased doses of coagulation factor. Because the incidence of hypopituitarism after ICH was found to be quite high, some authors recommend developing integrated screening programs for posttraumatic hypopituitarism as a standard of clinical care for patients with acute brain injury from trauma or SAH. We propose to extend this recommendation to haemophiliac patients, especially those who have a history of brain trauma or intracranial haemorrhage events. It could be essential for the optimal care in haemophiliac patients and allows effective therapy.


In children with haemophilia the growth should be systematically evaluated as a sensitive and simple marker of pituitary function (growth hormone, thyroid hormones). GH deficiency is a rare complication of haemophilia and can appear several years after intracranial haemorrhage. The case of our patient shows that subcutaneous injections with rhGH can be effective and safe in patients with severe haemophilia.


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