Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0019087 (hemorrhagic diathesis)
 678 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Five types of oculocutaneous albinism and two types of ocular albinism were found among 349 Puerto Rican albinos. The most prevalent type of albinism was the Hermansky-Pudlak syndrome (HPS). HPS was observed in five of every six albinos in Puerto Rico. The prevalence of HPS was highest in the northwestern quarter of the island, affecting approximately one in 1,800 persons, and approximately one in 22 are carriers of the gene. HPS is an autosomal recessively inherited triad of a tyrosinase-positive type of albinism, a hemorrhagic diathesis due to storage pool deficient platelets and accumulation of ceroid in tissues. The pigmentary phenotype of HPS albinos resembled that of any other type of oculocutaneous or ocular albinism. The most reliable method of diagnosing HPS is by a deficiency of platelet dense bodies observed by electron microscopy. The accumulation of ceroid in the tissues is associated with fibrotic restrictive lung disease and granulomatous enteropathic disease. The enteropathic disorder resembles Crohn's disease and with few exceptions, had its onset after 13 years of age. The major causes of death were fibrotic restrictive pulmonary disease, hemorrhagic episodes and sequelae of granulomatous enteropathic disease. Menometrorrhagia was common in women with HPS. No immune deficiency was found in HPS patients. The majority of patients with HPS had visual acuities of 20/200 or worse and consequently were legally blind. Albinos of all types, including HPS, lacked binocular vision due to nearly complete crossing of the optic tracts.
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PMID:Albinism and Hermansky-Pudlak syndrome in Puerto Rico. 226 Oct 23

Hermansky-Pudlak syndrome is a hereditary disease with an autosomal recessive mode of inheritance, characterized by the triad of tyrosinase-positive oculocutaneous albinism, a hemorrhagic diathesis resulting from storage pool-deficient platelets, and accumulation of ceroid/lipofuscin-like material in various cells and tissues and in the urine. The basic defect in this syndrome remains unknown. It is believed that the primary defect may involve membranes of the platelet-dense bodies and the melanosomes. Recently a defective calcium uptake system and low activities for membrane-associated thioredoxin reductase have been shown in Hermansky-Pudlak syndrome, and their possible role in the pathomechanism of this disorder is discussed.
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PMID:[Hermansky-Pudlak syndrome]. 265 78

The Hermansky-Pudlak Syndrome (HPS) is a rare autosomal recessively inherited triad of oculocutaneous albinism hemorrhagic diathesis and accumulation of ceroid in tissues. This article comprising the published reports of 232 patients is extended by the personal observation of a 7-year-old boy with HPS and immune deficiency due to a reduced activity of "natural killer" cells. In most cases the syndrome belongs to a form of tyrosinase-positive albinism with great clinical variability. The prolonged bleeding time is due to the lack of storage organelles (dense bodies) in thrombocytes. The most frequent complication of ceroid storage is fibrotic, restrictive lung disease. So far no curative therapy exists; the nature of the defect is still unknown.
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PMID:[Albinism, thrombopathy, ceroid storage disease--Hermansky-Pudlak syndrome. Overview and description with immunodeficiency]. 890 Nov 88