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Kaposi’s sarcoma in a child with Wiskott-Aldrich syndrome - European Journal of Pediatrics

  • ️Bejaoui, Mohamed
  • ️Fri Apr 07 2006

Abstract

Introduction

Kaposi’s sarcoma (KS) is rare in childhood. It may be favored by acquired immune deficiencies, but the predisposing factors to KS in other children are unclear.

Discussion

KS has been reported in only two children and one adult with primary immunodeficiency. We report here a Tunisian child with a Wiskott-Aldrich syndrome who developed KS at the age of 14 months.

Conclusion

This observation expands the spectrum of primary immunodeficiencies associated with KS in childhood.

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Introduction

Kaposi’s sarcoma (KS) was first described by Moritz Kaposi in 1872 [14]. It is an angiogenic-inflammatory neoplasm that originates from lymphatic endothelial cells and is driven by human herpesvirus-8 (HHV-8, also known as Kaposi’s sarcoma-associated herpesvirus) [2, 20]. Four clinical and epidemiological forms of KS have been defined: two idiopathic forms—the Sub-Saharan African (endemic) and Mediterranean (classic) forms [4]—and two secondary forms associated with either human immunodeficiency virus (HIV) co-infection (epidemic) [4] or transplantation-related immunosuppression (iatrogenic) [18]. KS is rare in children, but the number of reported cases of secondary forms has recently increased due to the HIV pandemic [28] and the increasingly frequent use of immunosuppressive drugs [27]. Only 29 cases of the classic form of KS have been reported to date in children living around, or originating from, the Mediterranean Basin [1, 3, 9–11, 17, 29]. A few cases of KS have been associated with primary immunodeficiencies (PIDs) [21]. These few cases of KS are surprising because PIDs affect a variety of immune cells and molecular pathways and at least some of these conditions affect T cells. We report here the first case of well-documented classic KS in a child with Wiskott-Aldrich syndrome (WAS).

Case report

The boy was born in 2000 to nonconsanguineous Tunisian parents living in Tunisia. His parents and sister were healthy. He was diagnosed at 23 months with Wiskott-Aldrich syndrome, due to a small WAS deletion (422del6) (nucleotide numbering according to http://www.homepage.mac.com/kohsukeimai/wasp/WASPbase.html). This mutation in exon 4 is in frame and is responsible for the 130Asp-Glu131 deletion in the WH1 domain of the WASP protein. Moreover, there was no detectable WASP protein in the patient’s PBMC using the protein assays described by Qasim et al. [24]. The patient’s medical history was marked by a local infection caused by bacille Calmette-Guérin vaccine and by chronic eczema from the age of 2 months, requiring 2 months of local steroid treatment. At 13 months, he suffered from thrombocytopenia (25×109 platelets/l), with reduced mean platelet volume, complicated by upper intestinal bleeding, which responded to blood transfusions and systemic corticosteroid treatment for 1 month (1 mg kg−1 day−1). He presented with severe staphylococcal pneumonia requiring mechanical ventilation at the age of 14 months. At 19 months, he suffered from autoimmune hemolytic anemia, which was treated by systemic corticosteroid treatment at 2 mg kg−1 day−1 for 2 months, then 3 mg kg−1 day−1 for another month.

At the age of 14 months, he developed multiple, small, painless, apparently angiomatous lesions on the anterior surfaces of the groin, chest and head. Six months later, the lesions had continued to progress, increasing in size and number. The oldest lesions were impressive, nodular and firm, and were dark blue. Some tumors appeared hyperkeratotic. Edema on the surrounding tissue could be observed, and on the dorsum of the fingers it antedated the cutaneous lesions. Non-scaly, reddish brown, well-circumscribed violaceous patches appeared on the patient’s face, legs and hands (Fig. 1a,b). The oral cavity was not involved. Clinical examination revealed hepatomegaly, splenomegaly, and enlarged bilateral cervical, submandibular, axillar and inguinal lymph nodes. Cerebral CT scan revealed a left intra-orbital lesion. A CT scan of the chest showed bilateral mediastinal and hilar adenopathies. Abdominal ultrasound revealed an abdominal mass of lymph nodes in the right flank, with homogeneous hepatomegaly. The relevant immunologic data are summarized in the Table 1. At 23 months of age, the patient was transferred into the Pediatric Immunology Hematology unit at the Necker Hospital in Paris, France.

Fig. 1
figure 1

Multifocal tumors, with an angiomatous-like aspect for the more recent and smaller ones, and an impressive dark-blue nodular aspect for the older ones. Surrounding edema (a), and recent well-circumscribed violaceous patches (b)

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Table 1 Immunologic parameters of patient

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The histological diagnosis of KS was performed at the age of 23 months on skin lesions and lymph-node biopsies. Pathologic analysis of a dermal and subcutaneous ulcerative skin showed numerous irregular blood vessels and the appearance of spindle-shaped cells in the background. The spindle cells formed slit-like spaces occupied by red blood cells. Immunohistochemistry showed that spindle cells were positive for CD34 and negative for PS-100 (Fig. 2a). These cells were also positive for HHV-8-associated latent nuclear antigen LANA (ORF73), confirming the diagnosis of KS (Fig. 2b). Antibodies against both latent and lytic antigens were sought by means of two specific immunofluorescence tests, as previously described [23]. The patient had high titers of antibodies against lytic antigens (1/320) but not against latent antigens (<1/20), whereas both types of antibody were detected at a low level (1/40 and 1/20, respectively) in the patient’s mother. Quantification of HHV-8 was performed by real-time polymerase chain reaction (TaqMan), as previously described [22]. HHV-8 viral load was 0.007 copies per cell for buffy-coat DNA, 0.0017 copies per cell in bone-marrow cells, 0.302 copies per cell in the lymph node and 0.117 copies per cell in the skin biopsy sample. The 870-bp ORF K1-coding region from nucleotide positions 105–974, numbered as for strain BC1 [25], was amplified, both in the lymph node and the skin biopsy DNA, directly by polymerase chain reaction with Ampli-Taq Gold (Perkin Elmer) as a 1,073-bp fragment, as previously described [16]. Phylogenetic analyses provided evidence for infection by an HHV-8 strain of the ORF K1 C molecular subtype C′′ subgroup. Serologic assays for Epstein-Barr virus (EBV), cytomegalovirus (CMV) and herpes simplex virus were positive, whereas tests for HHV-6, HIV-1, HIV-2, HTLV-1 and HTLV-2 were negative.

Fig. 2a, b
figure 2

Histology of the Kaposi’s nodule on skin biopsy (hematein-eosin-safranin staining). Original magnification ×400. a Spindle cells forming slit-like spaces occupied by red blood cells. b Nuclear staining of endothelial and spindle cells with anti-HHV-8 antibody

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At the age of 24 months, taxol treatment was immediately initiated at a dose of 60 mg/m2 given every 3 weeks in three infusions. The cutaneous lesions stabilized within 2 weeks, and partial regression was observed 1  month after the initiation of treatment (to be reported elsewhere). At the same time the patient presented with intracerebral EBV-related lymphoproliferative disease, which was treated with anti-CD20 antibody and by chemotherapy. Coinfection with CMV was treated simultaneously with ganciclovir. At the age of 28 months, the patient underwent non-T-cell-depleted allogeneic hematopoietic stem-cell transplantation (HSCT) after conventional conditioning. The donor was the patient’s father who is HLA-non-identical with HLA class I A mismatch. Stable engraftment with only donor chimerism on CD3+ cells was observed. Splenectomy was performed 5 months after HSCT for persistent peripheral thrombocytopenia. One year after HSCT, all KS cutaneous lesions, lymph nodes and hepatomegaly had disappeared, and the patient was in full remission. At last follow-up, 45 months after HSCT, the patient was alive and well, off treatment, with stable chimerism.

Discussion

The patient with WAS reported here presented HHV-8-associated KS. KS was diagnosed in this case on the basis of the following five criteria: typical clinical course, typical histopathological lesions, detection of HHV-8 antigen in situ, presence of HHV-8-specific serum antibodies, and detection of HHV-8 DNA in a cutaneous lesion. The Tunisian origin of the child and the C subtype of the HHV-8 strain identified are also consistent with a diagnosis of Mediterranean classic KS. The disease was disseminated to the skin, lymph nodes, liver and spleen. Taxol treatment gave partial remission of the KS and subsequent HSCT cured WAS and has contributed to the control of KS, as well as EBV-lymphoproliferative disorder in this patient.

WAS is a rare X-linked immunodeficiency disorder characterized by thrombocytopenia and small platelets, eczema, recurrent infections, and increased risk for autoimmunity and malignancy [8, 13]. Patients with WAS are highly susceptible to diseases caused by herpesviruses [26], and to EBV-lymphoproliferative disorders in particular [13]. One young adult with WAS and KS has been reported [19]. The HHV-8 status of this patient was not established, and he also had concomitant T-cell lymphoma, which may have contributed to the development of KS. Our patient had received systemic steroid treatment for 1 month and a first blood transfusion. Only 1 month after, KS lesions appeared at the age of 14 months. Systemic steroid treatment may have partially contributed to the development of KS. However, KS appeared before the onset of EBV-lymphoproliferative disease and the use of other systemic immunosuppressive drugs. Our patient is the second patient to be identified with both WAS and KS, but the first child. This observation expands the spectrum of PID associated with KS and supports the existence of a relationship between WAS and KS. A diagnosis of KS should be considered in selected children with WAS presenting with evocative cutaneous lesions.

KS associated with PID has been previously reported in only two children with PIDs, one child with complete IFNγR1 deficiency and mycobacterial coinfection [5] and in one child with an ill-defined PID associated with profound CD4 lymphopenia [15]. Why is KS so uncommon in children with PIDs, and why are PIDs so rare among children with KS? Classic KS is rare in childhood, with only 29 reported cases to date [1, 3, 9–11, 17, 29]. Only two multiplex families with KS have been reported, in a mother and her child [30] and in four adult siblings [12]. Together with the two multiplex families, the three observations of PIDs associated with KS are consistent with the notion that “idiopathic” childhood and perhaps even adulthood KS may actually result from nonconventional primary immunodeficiencies, presenting as predispositions to KS displaying Mendelian inheritance [6, 7].

Abbreviations

KS:

Kaposi’s sarcoma

HHV-8:

Human herpesvirus-8

HIV:

Human immunodeficiency virus

PIDs:

Primary immunodeficiencies

WAS:

Wiskott-Aldrich syndrome

HSCT:

Hematopoietic stem-cell transplantation

EBV:

Epstein-Barr virus

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Acknowledgements

We would like to thank Nicole Brousse and Laurent Abel for helpful discussions. We would like to thank all members of the Pediatric Immunology Hematology unit who took care of the patient. We would like to thank Alexis Proust for skillful technical assistance. R. Duprez was supported by the Ligue contre le Cancer. This work was supported by the Fondation BNP-Paribas and Fondation Schlumberger.

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Authors and Affiliations

  1. Unité d’Immunologie et d’Hématologie Pédiatriques AP-HP, Hôpital Necker-Enfants Malades, 149 rue de Sèvres, 75015, Paris, EU, France

    Capucine Picard, Gaëlle Chédeville, Bénédicte Neven, Alain Fischer, Stéphane Blanche & Jean-Laurent Casanova

  2. Laboratoire de Génétique Humaine des Maladies Infectieuses, Université René Descartes-INSERM U550, Faculté Necker, 156 rue de Vaugirard, 75015, Paris, EU, France

    Capucine Picard & Jean-Laurent Casanova

  3. Centre National de Greffe de Moelle, 2 rue Djebal Lakhdar, Bab Saadoun, 1006, Tunis, Tunisia

    Fethi Mellouli & Mohamed Bejaoui

  4. Unité d’Epidémiologie et Physiopathologie des Virus Oncogènes, Département Ecosystèmes et Epidémiologie des Maladies Infectieuses, Bâtiment Lwoff, Institut Pasteur, 28 rue du Dr. Roux, 75724, Paris, cedex 15, EU, France

    Renan Duprez & Antoine Gessain

  5. Laboratoire d’Anatomopathologie AP-HP, Hôpital Necker-Enfants Malades, 149 rue de Sèvres, 75015, Paris, EU, France

    Sylvie Fraitag

  6. Service d’Hématologie, d’Immunologie et de Cytogénétique AP-HP, Faculté de Médecine Paris-Sud and INSERM U473, Hôpital de Bicêtre, 78 rue du Général-Leclerc, 94275, Le Kremlin-Bicêtre, EU, France

    Jean Delaunay

  7. Centre d’étude des déficits immunitaires, Hôpital Necker-Enfants Malades, 149 rue de Sèvres, 75015, Paris, EU, France

    Capucine Picard & Françoise Le Deist

  8. Développement Normal et Pathologique du Système Immunitaire INSERM U429, Pavillon Kirmisson, Hôpital Necker-Enfants Malades, 149 rue de Sèvres, 75015, Paris, EU, France

    Françoise Le Deist & Alain Fischer

  9. Service de Dermatologie AP-HP, Hôpital Necker-Enfants Malades, 149 rue de Sèvres, 75015, Paris, EU, France

    Christine Bodemer

Authors

  1. Capucine Picard

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  2. Fethi Mellouli

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  3. Renan Duprez

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  4. Gaëlle Chédeville

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  5. Bénédicte Neven

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  6. Sylvie Fraitag

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  7. Jean Delaunay

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  8. Françoise Le Deist

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  9. Alain Fischer

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  10. Stéphane Blanche

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  11. Christine Bodemer

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  12. Antoine Gessain

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  13. Jean-Laurent Casanova

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  14. Mohamed Bejaoui

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Corresponding author

Correspondence to Capucine Picard.

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Picard, C., Mellouli, F., Duprez, R. et al. Kaposi’s sarcoma in a child with Wiskott-Aldrich syndrome. Eur J Pediatr 165, 453–457 (2006). https://doi.org/10.1007/s00431-006-0107-2

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  • Received: 30 November 2005

  • Revised: 30 January 2006

  • Accepted: 01 February 2006

  • Published: 07 April 2006

  • Issue Date: July 2006

  • DOI: https://doi.org/10.1007/s00431-006-0107-2

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