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The Rare Disease Search Engine is specialized search engine using Google's co-op program combined with a narrowed field of search to eliminate useless results that would normally complicate one's search for needed information.

To Search: simply begin typing in the name of the condition you wish to find. Results matching the partial name will be returned. The results will search through the name, abbreviation and alternate names of all conditions we have in our database. The results that are returned will be links to search results of a narrowed, filtered web search of only those sites that offer reliable, focused information on rare diseases. Hovering over the condition name will display a ist of alternate names on file.

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Pachydermoperiostosis Pachyonychia Congenita Paget's Disease Paget's Disease of the Breast Pallister Hall Syndrome Pallister Killian Mosaic Syndrome Pallister W Syndrome Pancreatic Islet Cell Tumor Papillitis Papillon Lefevre Syndrome Papular Urticaria Paracoccidioidomycosis Paramyotonia Congenita Parkinson's DiseaseParoxysmal Cold Hemoglobinuria Paroxysmal Nocturnal Hemoglobinuria Parry Romberg Syndrome Pars Planitis Parsonage Turner Syndrome Partial Androgen Insensitivity Syndrome Partial Monosomy 11q Chromosome 11 Partial Monosomy 13q Chromosome 13 Partial Monosomy 7p Chromosome 7 Partial Monosomy 9p Chromosome 9 Partial Trisomy 11q Chromosome 11 Partial Trisomy 6q Chromosome 6 Partial Trisomy Distal 4q Chromosome 4 Patella Ear Patulous Eustachian Tube Pediatric Cardiomyopathy Peeling Skin Syndrome Pelizaeus Merzbacher Brain Sclerosis Pemphigus Penta X Syndrome Pentalogy of Cantrell PEPCK Deficiency Peripheral Neuropathy Pernicious Anemia Perniosis Pertussis Peutz Jeghers Syndrome Peyronie Disease Pfeiffer SyndromePhelan-McDermid Syndrome Phenylketonuria Pheochromocytoma Phocomelia Syndrome Phosphoglycerate Kinase Deficiency Physical Urticaria Pica Pick's Disease Pierre Robin Sequence Pinta Pityriasis Rubra Pilaris Pleuropulmonary Blastoma POEMS Syndrome Poland Syndrome Polyarteritis Nodosa Polychondritis Polycystic Kidney Diseases Polycystic Liver Disease Polycystic Ovary Syndrome Polycythemia Vera Polymorphous Low-Grade Adenocarcinoma Polymyalgia Rheumatica PolymyositisPompe Disease Porphyria Cutanea Tarda Post Polio Syndrome Posterior Uveitis Prader Willi Syndrome Precocious Puberty Primary Agammaglobulinemias Primary Amenorrhea Primary Biliary Cirrhosis Primary Craniosynostosis Primary Hyperhidrosis Primary Lateral Sclerosis Primary Orthostatic Tremor Primary Pulmonary Hypertension Primary Sclerosing Cholangitis Primary Visual Agnosia Proctitis Progressive Multifocal Leukoencephalopathy Progressive Myoclonus Epilepsy Progressive Osseous HeteroplasiaProgressive Supranuclear Palsy ProlactinomaPropionic Acidemia Prostate Cancer Prostatitis Proteus Syndrome Prune Belly Syndrome Pseudo Hurler Polydystrophy Pseudoachondroplastic Dysplasia Pseudocholinesterase Deficiency Pseudohypoparathyroidism Pseudomyxoma Peritonei Pseudotumor Cerebri Pseudoxanthoma ElasticumPsittacosis Psoriasis Psoriatic Arthritis Ptosis Blepharophimosis Pulmonary Alveolar Proteinosis Pure Red Cell AplasiaPyknodysostosis Pyoderma Gangrenosum Pyridoxine-Dependent Seizures Pyruvate Carboxylase Deficiency Pyruvate Dehydrogenase Deficiency Pyruvate Kinase Deficiency