Excision as treatment of dermal melanomatosis in horses: 11 cases (1994-2000).

Objective: To determine whether excision was an acceptable treatment for dermal melanomatosis in horses.

Design: Retrospective study.

Animals: 11 horses with dermal melanomatosis involving the perineal, perianal, or perirectal region or ventral surface of the tail in which treatment consisted of tumor excision.

Detection of apoptotic cells in intestines from horses with and without gastrointestinal tract disease.

Objective: To identify apoptosis in equine intestines and determine whether apoptosis is associated with gastrointestinal tract disease or a specific tissue layer of intestine.

Animals: 38 horses that underwent surgery or were euthanatized for small or large intestine obstruction, strangulation, or distension and 9 control horses euthanatized for reasons other than gastrointestinal tract disease or systemic disease.

Procedure: Specimens were collected at surgery from intestine involved in the primary lesion and distant to the primary lesion site or at necropsy from several sites including the primary lesion site.