X Type Histiocytosis is a very rare disease that I only seldom encounter in both my The Woodlands dermatology and Conroe dermatology offices.  X Type Histiocytosis is a disease of Langerhans cell proliferation that involves not only the skin but multiple organ systems such as the bones, spleen, liver, lymph nodes, endocrine glands, central nervous […]

Congenital Self Healing Reticulohistiocytosis (CSHR), also called Hashimoto-Pritzker Disease, is a very rare X-Type Histiocytosis that I would only rarely encounter in both my The Woodlands dermatology and Conroe dermatology offices.  CSHR usually occurs at birth and can occur as either a solitary or generalized variant.  Clinically, the lesions in CSHR are red/brown nodules that […]

Sea Blue Histiocytosis is a type of histiocytosis that is very rarely encountered in both my The Woodlands dermatology and Conroe dermatology offices.  It is both an inherited disease and an acquired disease that can arise sporadically.  The hallmark of Sea Blue Histiocytosis is a histiocyte cell that stains bluish green using a Giemsa stain.  […]

Indeterminate Cell Histiocytosis is a rare type of Non-X Histiocytosis that I occasionally encounter in both my The Woodlands dermatology and Conroe dermatology offices.  Indeterminate cells are the precursors of Langerhans cells but lack the distinctive intracellular Birbeck granules.  Indeterminate Cell Histiocytosis is most common in males and occurs equally across all ages.  Clinically, Indeterminate […]

Multicentric Reticulohistiocytosis is a rare Non-X Histiocytosis that I occasionally encounter in both my The Woodlands dermatology and Conroe dermatology offices.  Multicentric Reticulocytosis usually appears after age 50 and is most common in women.  Patients present with reddish brown papules typically on the fingers around the nailfold and the clinical appearance has been termed “coral […]

Hereditary Progressive Mucinous Histiocytosis in Women is a rare type of Non-X Histiocytosis that I occasionally encounter in both my The Woodlands dermatology and Conroe dermatology offices.  In patients with this disease it is genetically derived and is transmitted either in an autosomal dominant or X-linked fashion.  It is exclusively found in women. Clinically, the skin […]

Papular Xanthoma is a type of Non-X Histiocytosis that I occasionally encounter in both my The Woodlands and Conroe dermatology offices.  Papular Xanthoma typically appears as multiple small yellow papules.  The lesions in Papular Xanthoma can be found anywhere on the body and have a predilection for the extensor surfaces.  In some instances, the lesions […]

Progressive Nodular Histiocytosis is a type of Non-X Histiocytosis that I occasionally encounter in both my The Woodlands dermatology and Conroe dermatology offices.  Clinically, a patient develops a nodule that has a superficial portion near the surface of the skin and a deeper portion that can extend into the fat layer of the skin.  Multiple […]

Xanthoma Disseminatum is a type of Non-X Histiocytosis that I occasionally encounter in both my The Woodlands dermatology and Conroe dermatology offices.  Clinically, Xanthoma Disseminatum appears as yellow/red/brown papules and nodules that can occur anywhere on the skin but are most prevalent in the folds and creases as well as the eyelids.  Over time, the […]

Generalized Eruptive Histiocytosis is a rare Non-X histiocytosis skin disease that I occasionally encounter in both my The Woodlands dermatology and Conroe dermatology offices.  Clinically, a patient develops multiple yellowish nodules on the arms, chest and back with no internal involvement.  Generalized Eruptive Histiocytosis rarely occurs in children and is most often seen in adults.  […]

Benign Cepahlic Histiocytosis is a type of Non-X Histiocytosis that I rarely encounter in my The Woodlands dermatology and Conroe dermatology offices as it occurs in children less than 5 years of age.  Red yellow papules occur on the head first and later appear on the neck and trunk.  The lesions in Benign Cephalic Histiocytosis […]

Juvenile Xanthogranuloma (JXG) is the most common Non-X Histiocytosis and I occasionally encounter this skin disease in both my The Woodlands dermatology and Conroe dermatology offices.  Clinically, JXG appears as a small red/pink nodule with a yellowish tinge that usually occurs on the head and neck.  90% of all JXGs are solitary.  In most cases, […]

Histiocystoses is a category of skin disease that is composed of dysregulation of a type of white blood cell called a histiocyte which is either a macrophage or a Langerhans cell.  The category of Histocytoses is further sub divided into the Non-X Histiocytoses composed of macrophages and the X Histiocytoses composed of Langerhans cells.  The Non-X Histiocytoses include: Juvenile […]