History:

 Desmoplastic nevus Usually head and neck and small dark lesions less than 5 mm diameter       View Virtual Slide Desmoplastic nevus

Histological features
Spindled nevus cells in the dermis
Surrounded by thick collagen in the dermis
No mitoses or pleomorphism

See this reference for other special stains and differentiation from Dermatofibroma and Desmoplastic melanoma

Also this reference for further images