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Melasma adalah hipermelanosis yang didapat, biasanya simetris dengan bentuk yang ireguler berupa makula coklat sampai abu-abu pada daerah wajah yang terpapar sinar matahari.

 Untuk mengetahui insidens  melasma di RSUP Dr. M Djamil Padang dari tahun 2001-2006, dilakukan studi retrospektif dengan  pengumpulan data melalui rekam medis pasien baru melasma di Poliklinik Kulit dan Kelamin RSUP Dr M Djamil Padang tahun 2001-2006

Selama tahun 2001-2006 terdapat 405 kasus melasma ( 8 laki-laki, 397 perempuan) dari 56.067 kunjungan (insidens 0,72%); tahun 2001 terdapat 68 kasus dari 9577 pasien (0,71%); tahun 2002, 77 kasus dari 9311 pasien (0,83%); tahun 2003, 63 kasus dari 9412 pasien (0,67%); tahun 2004; 67 kasus dari 9032 pasien (0,74%); tahun 2005, 54 kasus dari 9355 pasien (0,58%) dan tahun 2006, 76 kasus dari 9380 pasien (0,81%). Kasus terbanyak ditewajahn pada usia 30-40 tahun yaitu 256 kasus. Adapun faktor pencetus adalah paparan sinar matahari (216 kasus), pemakaian kontrasepsi (77 kasus), kosmetik (34 kasus), kehamilan (27 kasus), obat-obatan (khlorpromazin/ 6 kasus), keturunan (4 kasus) dan tidak diketahui (41 kasus). Berdasarkan bentuk klinis, tipe malar 220 kasus, sentrofasial 165 kasus dan tipe mandibular 20 kasus.

Disimpulkan bahwa insidens melasma dari tahun 2001-2006 bervariasi, kasus terbanyak ditemukan pada perempuan usia 30-50 tahun dengan klinis terbanyak adalah tipe malar.

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Melasma is a common acquired symmetric hypermelanosis characterized by irregular light brown to gray-brown maculae and patches on sun-exposed skin.

 To find the incidence of melasma at Dr.M Djamil Hospital Padang since 2001-2006. a retrospective study of melasma at Outpatient Clinic of Dermato-Venereology, by collecting data from the medical record of new patients from January 2001 to December 2006.

During 2001-2006 there was 405 cases (8 male, 397 female) from 56067 patients (the incidence was 0, 72%). In 2001 was 68 cases from 9577 patients (0, 71%); 2002, 77/9311 (0,83%); 2003, 63/9412 (0,67%); 2004, 67/9032 (0,74%); 2005, 54/9355 (0,58%) and 2006, 76/9380 (0,81%). The high cases between 30-40 years old was 256 cases. The suspect precipitated were sunlight exposure 216, contraceptive (pill and injection) 77, cosmetic 34, pregnancy 27, medicine (chlorpromazin) 6, genetic 4 and unknown 41 cases. The clinical patterns were sentrofacial 165, malar 220 and mandibular 20.

The result demonstrated the incidences of melasma in 2001-2006 were variable, the most precipitated was by sunlight exposure. The most affected was in female, and the most clinical type is malar.

Key words: Incidence, melasma, sun exposure, malar.