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Related Concept Videos

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Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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Cardiomyopathy III: Hypertrophic Cardiomyopathy

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Updated: Jun 15, 2026

High-speed Video Microscopy Analysis for First-line Diagnosis of Primary Ciliary Dyskinesia
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Hermansky-Pudlak syndrome.

Tiyas Sen1, Jai Mullerpattan, Dipika Agarwal

  • 1Hinduja National Hospital and Research Centre, Mahim, Mumbai 400 016.

The Journal of the Association of Physicians of India
|March 11, 2010
PubMed
Summary

Hermansky-Pudlak syndrome, a rare genetic disorder, presents with albinism and organ issues. This case highlights its potential misdiagnosis as drug-resistant tuberculosis.

Area of Science:

  • Genetics
  • Rare Diseases
  • Pulmonology

Background:

  • Hermansky-Pudlak syndrome (HPS) is a rare autosomal recessive disorder characterized by oculocutaneous albinism and systemic complications.
  • Clinical manifestations of HPS can vary widely, often leading to diagnostic challenges.

Observation:

  • A 33-year-old male with consanguineous parentage presented with oculocutaneous albinism, nystagmus, reduced visual acuity, refractive errors, pulmonary fibrosis, and granulomatous colitis.
  • Despite classical HPS features, the patient was misdiagnosed with disseminated, drug-resistant tuberculosis for many years.

Findings:

  • The patient's presentation included key features of Hermansky-Pudlak syndrome, such as albinism, visual impairment, and lung and colon involvement.
  • A high index of clinical suspicion was crucial in achieving the correct diagnosis of HPS, differentiating it from tuberculosis.

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Implications:

  • This case underscores the importance of considering rare genetic disorders like HPS in the differential diagnosis of complex conditions.
  • Accurate and timely diagnosis of HPS is essential to avoid prolonged misdiagnosis and inappropriate treatment, improving patient outcomes.
  • Increased awareness among clinicians regarding the diverse presentations of HPS can prevent diagnostic delays and improve patient management.