Pseudolymphoma is a drug reaction to anti-epileptics that is well recognized in humans; it has been reported in one cat but not dogs. In this report, lymphoma-like clinical signs are suspected to be secondary to phenobarbital administration in a dog. A 2.5-year-old male, neutered Shepherd mix presented for a 3-day history of progressive ataxia, dazed mentation, pyrexia, and lethargy. While hosp...

Actinic reticuloid (AR) or chronic actinic dermatitis is considered a sunlight-induced pseudolymphoma (PSL) on light exposed areas of the skin, which primarily affects elderly males. The disease is a severe, chronic photosensitive dermatosis, first described by Ive et al. in 1969. PSL is a group of non-cancerous lymphocytic skin disorders that simulate malignant lymphomas, but the changes usual...

Lingual tonsils are the most neglected element of Waldeyer’s ring; they cannot be visualized in a plain oropharyngeal examination. Lingual tonsillar hypertrophy (LTH) is frequently asymptomatic and underdiagnosed, but may be associated with obstructive sleep apnea (OSA); it is also included in the differential diagnosis of tongue base lymphoma. We present a case report and a review of the liter...

Cutaneous pseudolymphomas (CPLs) include a wide range of clinicopathological presentations sharing in common the presence of clinical and histopathological features mimicking those of primary cutaneous lymphomas. Although immunophenotypical studies and molecular analysis of clonality have been shown to be reliable tools, providing significant help in the differential diagnosis between primary c...

A 52-year-old white man first became ill in September 1968. He was hospitalized at that time at another institution with a right-sided pyopneumothorax treated by thoracotomy with pleural decortication and drainage of the empyema. A lung biopsy was reported as pseudolymphoma. His recovery was uneventful. In October, 1970 he was hospitalized at Hahnemann Medical College and Hospital because of in...

Drug-induced pseudolymphoma syndrome is a rare form of adverse cutaneous drug reaction. Its clinical and histological presentation may mimic mycosis fungoides, which sometimes leads to misdiagnosis and unnecessary treatments. We describe the case of a 65-year-old man with a generalized pruritic and confluent maculopapular eruption. His history of skin lesions was concordant with medication and ...