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Articles by M. R Pittelkow
Total Records ( 3 ) for M. R Pittelkow
  R. H Weenig , N. I Comfere , L. E Gibson , J Alonso Llamazares , M. D. P Davis , M. R Pittelkow and R. A. el Azhary

Background  Psoriasis is a common, nonulcerative skin disorder.

Observations  We describe 3 men recently referred to our institution for evaluation and treatment of severe, ulcerative psoriasis that ultimately was determined to be aggressive, cytotoxic, cutaneous lymphoma. Each had a history of relatively indolent, nonulcerative patches and plaques (duration, 2-45 years) that changed to ulcerated lesions; these rapidly progressed and eventuated in death.

Conclusions  The clinical characteristics of the skin lesions and the histopathologic findings form a distinct and rare presentation of cutaneous lymphoma. The initial course is similar to that of mycosis fungoides but eventuates in a highly aggressive disease with fatal outcome.

  A Sekulic , S. Y Kim , G Hostetter , S Savage , J. G Einspahr , A Prasad , P Sagerman , C Curiel Lewandrowski , R Krouse , G. T Bowden , J Warneke , D. S Alberts , M. R Pittelkow , D DiCaudo , B. J Nickoloff , J. M Trent and M. Bittner

Cutaneous squamous cell carcinoma (SCC) occurs commonly and can metastasize. Identification of specific molecular aberrations and mechanisms underlying the development and progression of cutaneous SCC may lead to better prognostic and therapeutic approaches and more effective chemoprevention strategies. To identify genetic changes associated with early stages of cutaneous SCC development, we analyzed a series of 40 archived skin tissues ranging from normal skin to invasive SCC. Using high-resolution array-based comparative genomic hybridization, we identified deletions of a region on chromosome 10q harboring the INPP5A gene in 24% of examined SCC tumors. Subsequent validation by immunohistochemistry on an independent sample set of 71 SCC tissues showed reduced INPP5A protein levels in 72% of primary SCC tumors. Decrease in INPP5A protein levels seems to be an early event in SCC development, as it also is observed in 9 of 26 (35%) examined actinic keratoses, the earliest stage in SCC development. Importantly, further reduction of INPP5A levels is seen in a subset of SCC patients as the tumor progresses from primary to metastatic stage. The observed frequency and pattern of loss indicate that INPP5A, a negative regulator of inositol signaling, may play a role in development and progression of cutaneous SCC tumors. Cancer Prev Res; 3(10); 1277–83. ©2010 AACR.

  N Leung , M. R Pittelkow , C. U Lee , J. A Good , M. M Hanley and T. P. Moyer

A 65-year-old female with biopsy-confirmed nephrogenic systemic fibrosis (NSF) received a kidney transplantation. Despite good kidney function, her symptoms continued to progress. Deferoxamine was administered intramuscularly at 500 mg/day and later 1000 mg/day after 1 week with no adverse effects. Urine excretion of gadolinium increased from 6.0 µg/day to 11.6 µg/day and subsequently to 13.0 µg/day with 500 mg/day and 1000 mg/day of deferoxamine, respectively. Serum levels, however, remain unchanged from 1.7 ng/ml to 1.4 ng/ml. Although chelation therapy may have a role in the treatment of NSF, deferoxamine is too weak and a stronger chelator is needed.

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