Pac–Pal

• Pachydermoperiostosis
• Pachygyria
• Pachyonychia congenita Jackson–Lawler type
• Pacman dysplasia
• Paes–Whelan–Modi syndrome
• Paget disease extramammary
• Paget disease juvenile type
• Paget's disease of bone
• Paget's disease of the breast
• Paget's disease, type 1
• Pagon–Bird–Detter syndrome
• Pagon–Stephan syndrome
• Pai–Levkoff syndrome
• Palant cleft palate syndrome
• Palindromic rheumatism
• Pallister–Hall syndrome
• Pallister–Killian syndrome
• Palmer–Pagon syndrome
• Palmitoyl-protein thioesterase deficiency
• Palmoplantar Keratoderma
• Palmoplantar porokeratosis of Mantoux
• Palsy cerebral

Pan

• Panayiotopoulos syndrome
• Pancreas agenesis
• Pancreas divisum
• Pancreatic adenoma
• Pancreatic beta cell agenesis with neonatal diabetes mellitus
• Pancreatic cancer
• Pancreatic carcinoma, familial
• Pancreatic diseases
• Pancreatic islet cell neoplasm
• Pancreatic islet cell tumors
• Pancreatic lipomatosis duodenal stenosis
• Pancreatitis, hereditary
• Pancreatoblastoma
• Panhypopituitarism
• Panic disorder
• Panmyelophthisis aplastic anemia
• Panniculitis
• Panophobia
• Panostotic fibrous dysplasia
• Panthophobia

Pap

• Papilledema
• Papillon–Lefèvre syndrome
• Papillitis of the lingual papillae
• Papillitis of the optic nerve
• Papilloma of choroid plexus
• Papular mucinosis
• Papular urticaria

Par

Pas–Pat

• Pascuel–Castroviejo syndrome
• Pashayan syndrome
• Passive-aggressive personality disorder
• Patau syndrome
• Patel–Bixler syndrome
• Patella aplasia, coxa vara, tarsal synostosis
• Patella hypoplasia mental retardation
• Patent ductus arteriosus familial
• Patent ductus arteriosus
• Patterson–Lowry syndrome
• Patterson pseudoleprechaunism syndrome
• Patterson–Stevenson syndrome

Pau–Pav

• Pauciarticular chronic arthritis
• Pavone–Fiumara–Rizzo syndrome

Pea–Pem

• Peanut hypersensitivity
• Pearson's marrow/pancreas syndrome
• Pediatric T-cell leukemia
• Pediculosis
• Peeling skin syndrome ichthyosis
• PEHO syndrome
• Pelizaeus–Merzbacher brain sclerosis
• Pelizaeus–Merzbacher disease, recessive, acute infantile
• Pelizaeus–Merzbacher disease
• Pelizaeus–Merzbacher leukodystrophy
• Pellagra
• Pellagra like syndrome
• Pellagrophobia
• Pelvic dysplasia arthrogryposis of lower limbs
• Pelvic inflammatory disease
• Pelvic lipomatosis
• Pelvic shoulder dysplasia
• Pemphigus and fogo selvagem
• Pemphigus foliaceus
• Pemphigus vulgaris, familial
• Pemphigus vulgaris
• Pemphigus

Pen–Pep

• Pena–Shokeir syndrome
• Pendred syndrome
• Penile agenesis
• Penoscrotal transposition
• Penta X syndrome
• Pentalogy of Cantrell
• Pentosuria
• Penttinen–Aula syndrome
• PEPCK 1 deficiency
• PEPCK 2 deficiency
• PEPCK deficiency, mitochondrial
• Peptidic growth factors deficiency

Per

• Perceptual disorder

Pes–Pey

• Pes planus
• Peters anomaly with cataract
• Peters anomaly
• Peters congenital glaucoma
• Petit–Fryns syndrome
• Petty–Laxova–Wiedemann syndrome
• Peutz–Jeghers syndrome
• Peyronie disease

Pha–Phi

• PHACE association
• Phacomatosis fourth
• Phacomatosis pigmentokeratotica
• Phacomatosis pigmentovascularis
• Phalacrophobia
• Pharmacophobia
• Pharyngitis
• Phenobarbital antenatal infection
• Phenobarbital embryopathy
• Phenol sulfotransferase deficiency
• Phenothiazine antenatal infection
• Phenylalanine hydroxylase deficiency
• Phenylalaninemia
• Phenylketonuria type II
• Phenylketonuria
• Phenylketonuric embryopathy
• Pheochromocytoma as part of NF
• Pheochromocytoma
• Philadelphia-negative chronic myeloid leukemia

Pho–Pht

• Phocomelia contractures absent thumb
• Phocomelia ectrodactyly deafness sinus arrhythmia
• Phocomelia Schinzel type
• Phocomelia syndrome
• Phocomelia thrombocytopenia encephalocele
• Phosphate diabetes
• Phosphoenolpyruvate carboxykinase 1 deficiency
• Phosphoenolpyruvate carboxykinase 2 deficiency
• Phosphoenolpyruvate carboxykinase deficiency
• Phosphoglucomutase deficiency type 1
• Phosphoglucomutase deficiency type 2
• Phosphoglucomutase deficiency type 3
• Phosphoglucomutase deficiency type 4
• Phosphoglucomutase deficiency
• Phosphoglycerate kinase 1 deficiency
• Phosphoglycerate kinase deficiency
• Phosphomannoisomerase deficiency
• Phosphoribosylpyrophosphate synthetase deficiency
• Photoaugliaphobia
• Photosensitive epilepsy
• Phthiriophobia

Phy

• Physical urticaria
• Phytanic acid oxidase deficiency
• Phytophotodermatitis

Pib–Pig

• PIBI(D)S syndrome
• Pica
• Picardi–Lassueur–Little syndrome
• Pick disease
• Pickardt syndrome
• Pie Torcido
• Piebald trait neurologic defects
• Piebaldism
• Piepkorn–Karp–Hickoc syndrome
• Pierre Marie cerebellar ataxia
• Pierre Robin sequence
• Pigmentary retinopathy
• Pigment dispersion syndrome
• Pigmented villonodular synovitis
• Pignata guarino syndrome

Pil–Piu

• Pili canulati
• Pili multigemini
• Pili torti developmental delay neurological abnormalities
• Pili torti nerve deafness
• Pili torti onychodysplasia
• Pili torti
• Pillay syndrome
• Pilo dento ungular dysplasia microcephaly
• Pilonidal cyst
• Pilotto syndrome
• Pinealoma
• Pinheiro–Freire–Maia–Miranda syndrome
• Pinsky–Di George–Harley syndrome
• Pinta
• Pipecolic acidemia
• PIRA
• Pitt–Hopkins syndrome
• Pitt–Rogers–Danks syndrome
• Pituitary dwarfism 1
• Pityriasis lichenoides chronica
• Pityriasis lichenoides et varioliformis acuta
• Pityriasis rubra pilaris
• Piussan–Lenaerts–Mathieu syndrome

Pod–Poi

• Podder-Tolmie syndrome
• POEMS syndrome
• Poedimus kyleopecia mental retardation
• Poikiloderma congenital with bullae Weary type
• Poikiloderma hereditary acrokeratotic Weary type
• Poikiloderma of Kindler
• Poikiloderma of Rothmund–Thomson
• Poikilodermatomyositis mental retardation
• Poikilodermia alopecia retrognathism cleft palate
• Pointer syndrome

Pol

Pom–Por

• Pompe's disease
• Poncet–Spiegler's cylindroma
• Pontoneocerebellar Hypoplasia
• Popliteal pterygium syndrome lethal type
• Popliteal pterygium syndrome
• Porencephaly cerebellar hypoplasia malformations
• Porencephaly
• Porokeratosis of Mibelli
• Porokeratosis plantaris palmaris et disseminata
• Porokeratosis punctata palmaris et plantaris
• Porphyria
• Porphyria cutanea tarda, familial type
• Porphyria cutanea tarda, sporadic type
• Porphyria cutanea tarda
• Porphyria, acute intermittent
• Porphyria, Ala-D
• Porphyria, congenital erythropoietic
• Porphyria, hereditary coproporphyria
• Portal hypertension due to intrahepatic block
• Portal hypertension
• Portal thrombosis
• Portal vein thrombosis
• Portuguese type amyloidosis

Pos–Pox

• Positive rheumatoid factor polyarthritis
• Post-polio syndrome
• Post Traumatic Stress disorder (PTSD)
• Postaxial polydactyly mental retardation
• Posterior tibial tendon rupture
• Posterior urethral valves
• Posterior uveitis
• Posterior valve urethra
• Post-infectious myocarditis
• Post-partum depression
• Post-traumatic epilepsy
• Postural hypotension
• Potassium aggravated myotonia
• Potassium deficiency (hypokalemia)
• Potter disease type 1
• Potter disease, type 3
• Potter sequence cleft cardiopathy
• Potter syndrome dominant type
• Powell–Buist–Stenzel syndrome
• Powell–Chandra–Saal syndrome
• Powell–Venencie–Gordon syndrome
• Poxviridae disease

Pra–Pre

• Prader–Willi syndrome
• Prata–Liberal–Goncalves syndrome
• Preaxial deficiency postaxial polydactyly hypospadia
• Preaxial polydactyly colobomata mental retardation
• Precocious epileptic encephalopathy
• Precocious myoclonic encephalopathy
• Precocious puberty
  • Precocious puberty, gonadotropin-dependent
  • Precocious puberty, male limited
• Preeclampsia
• Preeyasombat Viravithya syndrome
• Pregnancy toxemia /hypertension
• Prekallikrein deficiency, congenital
• Premature aging, Okamoto type
• Premature aging
• Premature atherosclerosis photomyoclonic epilepsy
• Premature menopause, familial
• Premature ovarian failure
• Premenstrual dysphoric disorder
• Prenatal infections
• Presbycusis
• Presbyopia

Pri

• Prieto–Badia–Mulas syndrome
• Prieur–Griscelli syndrome
• Primary agammaglobulinemia
• Primary aldosteronism
• Primary alveolar hypoventilation
• Primary amenorrhea
• Primary biliary cirrhosis
• Primary ciliary dyskinesia, 2
• Primary ciliary dyskinesia
• Primary craniosynostosis
• Primary cutaneous amyloidosis
• Primary granulocytic sarcoma
• Primary hyperoxaluria
• Primary hyperparathyroidism
• Primary lateral sclerosis
• Primary malignant lymphoma
• Primary muscular atrophy
• Primary orthostatic tremor
• Primary progressive aphasia
• Primary pulmonary hypertension
• Primary sclerosing cholangitis
• Primary tubular proximal acidosis
• Primerose syndrome
• Primordial microcephalic dwarfism Crachami type
• Prinzmetal's variant angina

Pro

Pru

• Prune belly syndrome
• Prurigo nodularis

Pse

Psi–Psy

• Psittacosis
• Psoriasis
• Psoriatic arthritis
• Psoriatic rheumatism
• Psychogenic polydipsia
• Psychophysiologic disorders
• Psychosis

Pub

• Pubic lice
• Puerperal fever

Pul

Pun–Pur

• Punctate acrokeratoderma freckle like pigmentation
• Punctate inner choroidopathy
• Pure red cell aplasia
• Puretic syndrome
• Purine nucleoside phosphorylase deficiency
• Purpura, Schönlein–Henoch
• Purpura, thrombotic thrombocytopenic
• Purpura
• Purtilo syndrome