Paediatric femoral hernia – The diagnostic challenge

AbstractIntroductionFemoral herniae are uncommon in childhood and pre-operative misdiagnosis is common. This can result in increased complications or inappropriate inguinal exploration. The aim of this retrospective study was to assess a tertiary centre’s experience with paediatric femoral hernia over a 12 year period.MethodsChildren who underwent femoral hernia repair at a single centre were identified from a prospectively maintained database. Casenotes were reviewed for demographic data and details of presentation, operation and recurrence.ResultsSixteen children with a median age of 7 (range 3–16) years were identified. One patient developed bilateral femoral herniae. All children were referred with a groin lump but in only one instance did the referring clinician establish the diagnosis of femoral hernia. Emergency repair was required in 2 patients (12%). Eleven femoral herniae were diagnosed following clinical assessment ultrasound. The remainder were identified intra-operatively following negative inguinal exploration. Intra-operatively the femoral canal was closed with sutures (n = 16) or mesh plug (n = 1). Only one patient had a laparoscopic repair. Two other patients underwent laparoscopy to confirm bowel viability (n = 1) and for inguinal canal assessment with subsequent open femoral hernia repair (n = 1). All patients were reviewed in surgical clinic and no morbidity or hernia recurrences were reported.ConclusionFemoral herniae are a diagnostic challenge and a high index of clinical suspicion is necessary. Ultrasonography or laparoscopy may be appropriate in equivocal cases. The long-term results of paediatric femoral hernia surgery are excellent

The thymus in "bare lymphocyte" syndrome : Significance of expression of major histocompatibility complex antigens on thymic epithelial cells in intrathymic T-cell maturation

Thymic biopsies from two patients with combined immunodeficiency and defective expression of HLA class I and class II antigens on blood mononuclear cells (“bare lymphocyte” syndrome) were investigated. This made possible an evaluation of the significance of HLA antigen expression in a detailed (immuno)histologic study. Both thymuses showed a normal lobular architecture with distinct cortex-medulla areas, well-differentiated epithelium, including ultrastructurally defined subtypes, and Hassall's corpuscles. Normal numbers of lymphoid cells were present and normal T-cell phenotype was found. Using anti-HLA-A,B,C antisera, confluent staining of the medulla (stroma and lymphocytes) was observed. One of the thymuses was found to be negative for HLA class II antigen expression: the other revealed only HLA-DR positivity of nonlymphoid cells in the medulla. These cells were not of epithelial nature as judged from double staining with anti-keratin antibody. There was no expression of HLA-DC/DS. These observations differ from findings in the normal thymus, wherein epithelial cells in the cortex carry HLA class I and class II antigens, and epithelial cells in the medulla express HLA class I, and for a minor part class II antigens. The results indicate a normal sequential acquisition of T-cell differentiation antigens in the thymus of both cases. It is suggested that the expression of HLA class I and class II antigens on epithelial cells in the normal thymus cortex does not play a significant role in the sequential acquisition of differentiation antigens on T lymphocytes