Syringocystadenocarcinoma papilliferum (SCACP) is a rare form of adenocarcinoma of the skin. This is the malignant counterpart of syringocystadenoma papilliferum (SCAP) and usually develops on the scalp in a long-standing lesion identified clinically as SCAP. We describe a 65-yr-old Korean man with a nodule on the right supra-pubic area with a 2-yr duration. Histologically this tumor had a simi...

Introduction: Poroid hidradenomas (PH) are rare benign skin adnexal tumours with eccrine differentiation. PH have features of both poroma and hidradenoma, wholly intradermal. Few been reported in the literature, here we present two cases localised to left knee. The common histological examination finding was a circumscribed cyst lined by basaloid cells resembling poroma, occasional ductal struc...

Poroma is a rare benign neoplasm that derives from eccrine sweat glands epithelium. Its histological subtypes, with respect to its position within skin layers, are eccrine poroma, hidroacanthoma simplex, poroid hidradenoma, and dermal duct tumor. Poromas commonly exhibit benign clinical behavior as they are usually small and asymptomatic and do not exhibit malignant behavior. Although their his...

Sir, Syringocystadenoma papilliferum (SCAP) is a rare tumour first described in 1893 (1). To date, 400 cases have been reported worldwide. SCAP usually appears at birth or in early childhood, most frequently on the face or scalp. In approximately 25% of cases it is observed on other locations such as the trunk or the extremities. In 40% of cases, SCAP evolves contiguous to a pre-existing naevus...

Plant populations are often spatially structured owing to limited dispersal of pollen and seed. Mating between neighboring individuals in such populations often leads to reduced reproductive performance relative to matings between distant individuals. This response, which may be a result of inbreeding depression or prezygotic mating barriers, was investigated for slickspot peppergrass, Lepidium...