Acquired Melanonychia in Chilean Patients with Essential Thrombocythemia Treated with Hydroxyurea: A Report of 7 Clinical Cases and Review of the Literature

Table 1

Clinical features of nail pigmentation.

Age	Sex	Mean dose/day	Time using hydroxyurea	Number of nails affected hands (feet)	Skin hyperpigmentation
78	M	1500 mg	2 years	3 (0)	No
84	M	2500 mg	5 years	10 (10)	Yes
63	M	500 mg	6 years	2 (0)	No
59	M	1000 mg	3 years	5 (2)	No
81	M	500 mg	4 years	10 (10)	No
64	F	1500 mg	5 years	8 (4)	No
73	F	2000 mg	7 years	6 (10)	Yes