Dermatologic Manifestations of Hermansky-Pudlak Syndrome Clinical Presentation
- Author: Noah S Scheinfeld, JD, MD, FAAD; Chief Editor: Dirk M Elston, MD more...
Because patients with Hermansky-Pudlak syndrome have platelet dysfunction, albinism, and ceroid accumulation, clinical history that relates to these complications must be investigated.
When the intestines are infiltrated with ceroid, patients can have diarrhea, weight loss, cramps, and possibly blood in the stool. These manifestations resemble those of inflammatory bowel disease, with the onset of symptoms occurring in patients aged 12-30 years. Most of the patients with Hermansky-Pudlak syndrome–related bowel disease are Puerto Rican. Response to medical therapy is said to be poor. One article reported 2 children, aged 7 years and 3 years, with granulomatous colitis in association with Hermansky-Pudlak syndrome. One of these children was Puerto Rican. Hazzan et al noted Crohn disease–like colitis, enterocolitis, and perianal disease in a patient with Hermansky-Pudlak syndrome, suggesting that the intestinal pathology of Hermansky-Pudlak syndrome results from the development of classic Crohn disease.
Ceroid can infiltrate the pulmonary system as well. When the lungs are impaired in this fashion, shortness of breath and abnormal fatigue with exertion can occur. The disease can progress to pulmonary fibrosis, with scar tissue restricting the inflation of the lungs. Patients should be asked about previous pulmonary function tests and steroid therapy. Thomas de Montpréville et al noted pulmonary fibrosis in a patient with Hermansky-Pudlak syndrome related to a defect in surfactant. This patient had undergone lung transplantation.
Hermansky-Pudlak syndrome impairs vision; thus, patients should be asked about photophobia, previous eyeglasses, bifocals, eyeglass tints, low-vision aids, amblyopia therapy, and strabismus surgery.
Patients with Hermansky-Pudlak syndrome are prone to skin cancers; thus, they should be asked about any new skin growths. A history of sun exposure, sunblock application, skin biopsy, and cancers should be obtained from patients.
Bleeding diathesis must be investigated. Persons with Hermansky-Pudlak syndrome may have a tendency to bruise easily or to experience frequent nosebleeds or prolonged bleeding. Epistaxis is the most frequent hemorrhagic manifestation. Patients with Hermansky-Pudlak syndrome can have unusual bleeding episodes (eg, heavy menstrual bleeding, bleeding with dental procedures). Patients should be asked about medications that affect bleeding and, thus, should be queried about the use of aspirin and aspirin derivatives. Persons should be asked if their children or parents bleed easily.
Women with Hermansky-Pudlak syndrome should be queried about pregnancies and pregnancy complications, menometrorrhagia, abnormal uterine bleeding, and gynecologic surgery. Therapy-refractory menorrhagia has been noted as the first manifestation of Hermansky-Pudlak syndrome.
Family history is important in understanding Hermansky-Pudlak syndrome. Patients should be asked where their families originated. Puerto Rican ancestry is important and must be investigated. Parental consanguinity and family incidence of Hermansky-Pudlak syndrome need to be reviewed with patients.
In 2003, Iannello et al described a new familial Hermansky-Pudlak syndrome clinical variant in 2 sisters, one aged 6 years and the other aged 23 years. They expressed the common symptoms of Hermansky-Pudlak syndrome, but they also had diffuse interstitial pulmonary disease as well as augmented platelet aggregation. They were very susceptible to bacterial infections.
Interestingly, Iannello et al observed a urinary tract abnormality in a younger sister with Hermansky-Pudlak syndrome and a porencephalic cyst in an older sister with Hermansky-Pudlak syndrome. These developmental defects have been reported in persons with Cross syndrome (oculocerebral hypopigmentation syndrome), which is a syndrome that has evaded precise definition. These sisters seemed to have an overlapping of the phenotypic manifestations of different rare syndromes. The presence of ceroidlike autofluorescent material in urinary sediment, combined with the histologic aspects and the autofluorescence of oral mucosa biopsy specimens, was consistent with a ceroidlike lipofuscin storage problem.
Enders et al noted lethal hemophagocytic lymphohistiocytosis in Hermansky-Pudlak syndrome type II.
Interestingly, Hermansky-Pudlak syndrome is a bleeding defect, in part, but late-onset menstrual bleeding has been noted.
In Hermansky-Pudlak syndrome type IV, which involves (BLOC)-3, impacts healthy subjects' working memory and impacts function deficits in those with schizophrenia; this is not surprising because HPS is a neural disease in part.
Physical findings relate to albinism, which affects the skin and the eyes. Pulmonary fibrosis can also be evaluated on physical examination.
Skin findings in Hermansky-Pudlak syndrome are as follows:
Melanocytic nevi with dysplastic features, acanthosis nigricans–like lesions in the axillae and the neck, and trichomegaly have been reported to occur.
Metastatic skin involvement of granulomatous colitis in Hermansky-Pudlak syndrome has been reported. 
Ocular findings in Hermansky-Pudlak syndrome are as follows:
Ocular findings in patients with Hermansky-Pudlak syndrome include the following: poor visual acuity, refractive errors associated with with-the-rule astigmatism, strabismus, congenital nystagmus, prominent Schwalbe line, iris transillumination, foveal hypoplasia, and albinotic retinal mid periphery, as shown in the image below.
Best-corrected visual acuity in patients with Hermansky-Pudlak syndrome ranges from 20/60 to 20/400 in the Snellen chart. Refractive errors range from high myopia to hyperopia.
Patients with Hermansky-Pudlak syndrome have congenital nystagmus. The most common types of strabismus found in patients with this syndrome are esotropia and exotropia. Vertical deviations have been reported.
Patients with Hermansky-Pudlak syndrome have various anterior segment abnormalities that include the following: a prominent Schwalbe line, iris transillumination, and presenile cataracts. Iris transillumination varies from almost total transillumination (pigment found at the collarette) to minimal peripheral transillumination.
Patients with Hermansky-Pudlak syndrome have pale optic nerves.
Patients with Hermansky-Pudlak syndrome have foveal hypoplasia. Vascular architecture varies. Macular transparency (grading visibility of choroidal vessels) ranges from transparent to opaque. Patients with Hermansky-Pudlak syndrome have albinotic mid periphery.
Patients with Hermansky-Pudlak syndrome can have poor binocular vision.
Patients with this syndrome have no color vision defects on Ishihara testing.
Visual-evoked potentials show excessive decussation of the optic nerve fibers.
Iris heterochromia with Hermansky-Pudlak syndrome has been reported. 
Pulmonary and cardiac findings in Hermansky-Pudlak syndrome are as follows:
Because patients can manifest with impaired lung function, auscultation of patients' lungs is important.
The lung's susceptibility to pulmonary fibrosis in Hermansky-Pudlak syndrome is determined by the alveolar epithelium. 
Because accumulation of ceroid in the heart can cause cardiomyopathy, auscultation of the heart is important.
A case of pulmonary alveolar proteinosis has been reported. 
Hermansky-Pudlak syndrome is an autosomal recessive disorder. Founder effects (one or several people who originated a population) are believed to cause the clustering of the disease in such places as Puerto Rico. The origin of Hermansky-Pudlak syndrome in Puerto Rico has been traced to a region of southern Spain, and a connection to cases in Holland is possible.
Other researchers have identified a second example of a founder mutation causing Hermansky-Pudlak syndrome in central Puerto Rico. They estimated that the large deletion in the HPS3 gene arose from 1880-1890. At that time, the ancestors of 3 of the 6 families with HPS-3 emigrated from the town of Ciales to the towns of Aibonito, Barranquitas, and Naranjito. Each of the 3 families could also trace their ancestry to 1 individual, Calixto Rivera, who brought his relatives to Aibonito and the surrounding area to deforest his land for tobacco growing.
Consanguinity and geographical isolation contribute to the continued occurrence of the disease.
Pseudodominance has been reported in the northwestern quarter of Puerto Rico and is associated with patients with Hermansky-Pudlak syndrome who marry persons who are carriers.
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