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Our Team

We have 4 physicians, a nurse practitioner, and over 20 other team members dedicated to clinical care and research to improved lives of children and adults with histiocytic disorders. In addition to our team of specialists focused on histiocytosis, patients may see neurologists, radiologists, endocrinologists, orthopaedic surgeons, pathologists, and many other clinical and social specialists in order to receive the best possible care.


Dr. Kenneth McClain is Director of the Histiocytosis Program at Texas Children’s Cancer and Hematology Centers and a member of the leukemia and lymphoma programs. Dr. McClain and Dr. Carl Allen see 100 newly-diagnosed patients with a variety of histiocytic diseases each year. His clinical interests…
Phone: 832-822-4208

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Dr. Carl Allen is co-director of the Texas Children’s Cancer Center Histiocytosis and Lymphoma Programs, where he leads a team of over 30 clinicians and scientists dedicated to improving the outcomes of children and adults with histiocytic disorders, lymphoma and lymphoproliferative disorders.…
Phone: 832-824-4312

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I strive to provide the highest quality pediatric endocrine care in a caring manner. Clinical Interests: Pediatric diabetes, Congenital adrenal hyperplasia, Thyroid disease in children, Turner Syndrome, Growth disorders in children, Type 2 diabetes DSD, Disorders of Sexual Differentiation (DSD)
Phone: 832-822-3670 (Main) | 281-494-7010 (Sugar Land)

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Dr. Olive Eckstein is a clinical expert with extensive experience in the evaluation and care of pediatric and adult patients with histiocytic disorders, lymphomas, and rare lymphoproliferative and immune disorders.  As a physician in one of the largest Histiocytosis and Lymphoma programs in the…
Phone: 832-824-4848

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Patricia Wills Bagnato has worked in pediatric bone marrow transplant for 18 years. She provided clinical care to children and adolescents who underwent bone marrow transplant (BMT), and to many survivors of BMT. Mrs. Wills Bagnato's current primary clinical role is performing bone marrow…
Phone: 832-824-6718

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