Medical Hair Encyclopedia
Dermatological pathologies and evidence-based clinical guidelines at international standards.
Scalp Involvement in Leprosy (Hansen's Disease) and Granulomatous Diseases – Diagnosis and Treatment Guide
📌 Patient Information Section: What Does This Condition Mean?
Leprosy (Hansen's disease) is a chronic granulomatous infectious disease caused by the bacterium Mycobacterium leprae, affecting peripheral nerves and the skin. Although rare, it can lead to characteristic hair loss on the scalp and face.
- Hair and Eyebrow Involvement: Especially in the lepromatous form of leprosy, madarosis (loss of the outer portion of the eyebrows) and permanent hair loss with granulomatous nodules and plaques on the scalp can develop.
- Other Findings: Sensory loss in the skin (pale patches where hot-cold and pain sensations are lost), thickening of the earlobe, nerve involvement, and asymmetric facial findings.
- What to Do?: It is a disease that can be completely treated with multidrug combinations (MDT - Multidrug therapy). Early diagnosis is vital to prevent permanent nerve damage.
🩺 Clinical & Medical Guide for Physicians
- Etiology and Pathophysiology: Mycobacterium leprae or Mycobacterium lepromatosis are the causative agents. Bacilli prefer cooler body regions (earlobes, nasal mucosa, periphery of the scalp). They infiltrate hair follicles and nerve endings with granulomatous inflammation, causing cicatricial or non-cicatricial alopecias.
- Diagnostic Criteria and Clinical Findings: Loss of the lateral one-third of the eyebrows (Madarosis), infiltrative lesions, nodules, and sensory-deficient lesions on the scalp. Thickening of the great auricular nerve.
- Histopathological Diagnosis (Punch Biopsy):
- Biopsy Indication: A 4 mm punch biopsy is taken from suspicious granulomatous scalp or facial lesions.
- Pathology: Granulomas composed of epithelioid cells, Virchow cells (foamy macrophages), and lymphocytes in the dermis. Demonstration of intracellular bacillary clusters (globi) with Fite-Faraco or Ziehl-Neelsen staining.
- Current Treatment Protocols:
- Multidrug Therapy (MDT): Combinations of Rifampicin, Dapsone, and Clofazimine are administered continuously (for 6 months to 2 years depending on the disease type) in accordance with the World Health Organization (WHO) protocol. Additionally, specialized and treatment approaches can be reviewed for clinical and surgical evaluations.
Scientific References and Bibliography
- Kaya D, Garnes ND, Robins A, Su SY, Ginsberg LE, Chen MM. Leprosy of the great auricular nerve: case report and review of the literature. Clin Imaging. 2022 Feb;82:63-66. doi: 10.1016/j.clinimag.2021.10.001. Epub 2021 Oct 15. PMID: 34775253. PubMed Link
- Concha R M, Cossio T ML, Salazar S I, Fich S F, Pérez C C, González B S. Enfermedad de Hansen: Revisión a propósito de un caso [Hansen's disease: case report and review of literature]. Rev Chilena Infectol. 2008 Feb;25(1):64-9. Spanish. PMID: 18273528. PubMed Link
- Thaipisuttikul Y, Kateruttanakul P. Sarcoidosis mimics lepromatous leprosy: a case report. J Med Assoc Thai. 2007 Jan;90(1):171-4. PMID: 17621750. PubMed Link
Frequently Asked Questions About Scalp Involvement in Leprosy (Hansen's Disease) and Granulomatous Diseases
Insights into the effects of leprosy (Hansen's disease) and granulomatous diseases on the scalp, cicatricial alopecia processes, and treatment approaches, with the expertise of Dr. Muhammet Özgehan Clinic.
Leprosy (a chronic infectious disease caused by the bacterium *Mycobacterium leprae*) is a granulomatous disease that targets nerves and skin. When it involves the scalp, infiltrations, nodules, and sensory loss due to nerve damage can be observed, especially in lepromatous forms of leprosy. Dr. Muhammet Özgehan states that this granulomatous process can disrupt follicular units, leading to localized hair loss.
Yes, leprosy and similar deep granulomatous diseases can lead to cicatricial (scarring/permanent) alopecia because they trigger chronic inflammation and connective tissue (scar) development in the tissue. Hair follicles in the affected areas are irreversibly destroyed. Dr. Muhammet Özgehan emphasizes that early diagnosis in such systemic and granulomatous infections is vital to prevent tissue damage and permanent baldness.
The primary goal of treatment is to completely halt the causative microorganism or the underlying systemic inflammation. Current approaches followed at Dr. Muhammet Özgehan's clinic and in dermatological consultations include:
- Multidisciplinary Systemic Treatments: Long-term multi-antibiotic (Combined Antileprotic) protocols under medical supervision for specific infections like leprosy.
- Skin Biopsy and Pathological Analysis: Histopathological examination for the presence of granulomas and bacteria for definitive diagnosis of scalp lesions.
- Inflammation and Scar Management: Physician-approved supportive medical care to minimize tissue damage and manage sequelae.
Hair transplantation is absolutely contraindicated (not performed) during periods when the disease is active, treatment is incomplete, or tissue inflammation persists. Dr. Muhammet Özgehan states that surgical interventions performed before the infection is completely cured and scar tissue has stabilized can both trigger the infection and make graft survival impossible. However, if the disease was completely cured years ago, an evaluation can be made in very selected cases by analyzing tissue quality.
The follow-up of systemic and granulomatous skin conditions requires great diligence. Dr. Muhammet Özgehan offers the following recommendations to individuals undergoing this process:
- Never neglect systemic treatment courses and check-ups prescribed by the physician.
- Immediately report any sensory loss, discoloration, nodule, or scar on the scalp to a dermatologist.
- Carefully protect the skin from trauma and chemical irritants.
For Your Questions and Clinic Appointment
For any questions about leprosy, granulomatous scalp diseases, and treatment planning, or to schedule an examination appointment, you can contact Dr. Muhammet Özgehan Clinic immediately.