Eccrine spiradenoma: an uncommon breast tumour

Eccrine spiradenoma is a benign tumour of the sweat gland. Eccrine glands can be found almost everywhere but are mostly concentrated on the palms, soles and the axillae. Lesions involving the breast are rare. We present a case of a 13-years-old Malay girl with eccrine spiradenoma of the breast. The clinical presentation and histological features are being described

Gaussian fields and Gaussian sheets with generalized Cauchy covariance structure

Two types of Gaussian processes, namely the Gaussian field with generalized Cauchy covariance (GFGCC) and the Gaussian sheet with generalized Cauchy covariance (GSGCC) are considered. Some of the basic properties and the asymptotic properties of the spectral densities of these random fields are studied. The associated self-similar random fields obtained by applying the Lamperti transformation to GFGCC and GSGCC are studied.Comment: 32 pages, 6 figure