ABSTRACT
Except for urticarial vasculitis, histopathological studies on the different types of urticaria are scant in the medical literature. With the purpose of evaluating the histopathological changes that occur in chronic urticarial eruptions, and to correlate the histopathological findings with the clinical presentation of the patients, skin biopsy studies were done in 36 patients with chronic urticaria. Three well-defined histopathological patterns were found: namely neutrophilic, lymphocytic, and mixed type. No cases of vasculitis were found. No specific association to the clinical presentation of the patient was found.
Subject(s)
Urticaria/pathology , Adolescent , Adult , Aged , Chronic Disease , Collagen Diseases/complications , Eosinophilia/complications , Eosinophils/pathology , Female , Humans , Hypersensitivity, Immediate/complications , Lymphocytes/pathology , Male , Middle Aged , Neutrophils/pathology , Skin/pathologyABSTRACT
A 24 year-old woman with systemic lupus erythematosus developed a subcutaneous nodule on the back which upon histopathological examination was found to be a case of phaeohyphomycosis. To our knowledge, this is the first case of the condition to be reported in Puerto Rico.
Subject(s)
Lupus Erythematosus, Systemic/complications , Mitosporic Fungi , Mycoses/complications , Opportunistic Infections/complications , Adult , Female , Humans , Lupus Erythematosus, Systemic/pathology , Mycoses/diagnosis , Mycoses/pathology , Opportunistic Infections/diagnosis , Opportunistic Infections/pathology , Puerto Rico , Skin/pathologyABSTRACT
The term parapsoriasis refers to a group of chronic asymptomatic scaly dermatoses of unknown etiology about which there is still controversy over the nosology and nomenclature of the different conditions that comprise the group, particularly pityriasis lichenoides chronica (PLC) and small plaque parapsoriasis (SPP). In an attempt to establish the distinctive clinicopathologic features of these two dermatosis, we prospectively studied 44 patients who presented with the typical clinical and histologic picture of either of these two diseases. SPP was clinically characterized by scaly oval plaques on the trunk and proximal aspect of extremities. Spongiosis was the salient histopathologic feature, with absence of fibrosis or melanophages. PLC presented with a scaly papular eruption over the trunk and extremities and histologically was characterized by an interface dermatitis. We conclude that sufficient clinical and histologic features differentiate these two entities and we propose that the term parapsoriasis be used only to designate SPP and large plaque parapsoriasis.
