PEDIATRIC NECK MASSES

2.  Branchial cleft cyst
 Thyroglossal duct cyst
 Cystic hygromas
 Laryngoceles
 Dermoid cyst
 Teratoma
 Thymic cysts
 Hemangiomas

4.  Thyroid masses
 Enlarged lymph nodes
 Malignant
 Lymphomas
 Rhabdomyosarcoma
 Neuroblastoma
 Melanoma

9.  Immune dysfunction of B and T cells and dendritic cells
 Defect: inability of B cells to differentiate into plasma cells capable of secreting all
immunoglobulin types
 Definition
 Age-specific reduction in serum concentrations of immunoglobulin G, in combination
with low levels of immunoglobulin A and/or immunoglobulin M
 Presence of B cells
 Poor or absent response to immunizations
 An absence of any other defined immunodeficiency state

10.  Rhinosinusitis
 Otitis media
 Pneumonia
 Giardia infections

11.  Recurrent infections
 Pulmonary manifestations
 Failure to thrive
 Gastrointestinal problems
 Autoimmune disease
 Malignancy