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J Cutan Pathol 2021 May 8. Epub 2021 May 8.

Razi laboratory, Rasht, Iran.

Rhabdomyomatous mesenchymal hamartoma (RMH) is a rare congenital malformation of the dermis and subcutaneous tissue. Usually, RMH occurs in the midline of the face and neck region. We described a case of RMH presenting as telangiectasia in a 57-year-old man with a history of pityriasis lichenoides chronicus. Read More

Int J Dermatol 2021 May 2. Epub 2021 May 2.

Department of Dermatology, Mayo Clinic, Rochester, MN, USA.

Ann Dermatol 2021 Feb 30;33(1):94-96. Epub 2020 Dec 30.

Department of Dermatology, College of Medicine, Dankook University, Cheonan, Korea.

JAAD Case Rep 2021 Jun 3;12:12-14. Epub 2021 Apr 3.

Bighorn Mohs Surgery and Dermatology Center, La Jolla, California.

Am J Dermatopathol 2021 Mar 30. Epub 2021 Mar 30.

Advanced DermCare, Danbury, CT; Department of Pathology, Phoenix Children's Hospital, Phoenix, AZ; Department of Dermatology, HCA Healthcare/USF Morsani College of Medicine GME, Largo Medical Center, Largo, FL; and Division of Dermatology, Department of Pediatric Dermatology, Phoenix Children's Hospital, Phoenix, AZ.

Abstract: A 15-year-old boy presented to the pediatric dermatology department with long-standing patch stage CD8+ mycosis fungoides and subsequent development of recurrent pityriasis lichenoides et varioliformis acuta eruptions. There have been rare reports of patients with chronic, recalcitrant pityriasis lichenoides developing mycosis fungoides, but we believe this to be the second case of mycosis fungoides preceding a diagnosis of pityriasis lichenoides, and the first case reported in the pediatric population. Read More

Case Rep Dermatol 2021 Jan-Apr;13(1):12-17. Epub 2021 Jan 21.

Division of Dermatology, Department of Internal Medicine, Albert Einstein College of Medicine, Bronx, New York, USA.

Febrile ulceronecrotic Mucha-Habermann disease (FUMHD) is a rare and severe variant of pityriasis lichenoides et varioliformis acuta (PLEVA) characterized by intermittent pyrexia, acute onset of generalized ulceronecrotic lesions, and histopathology suggestive of PLEVA. Prompt diagnosis and treatment are necessary to halt the progression of this potentially fatal disease; however, the widely variable presentation of FUMHD in addition to its rarity poses a diagnostic challenge. We report the case of a previously healthy 43-year-old woman who presented to the emergency department with 1 month of generalized rash and intermittent fevers. Read More

J Dermatol 2020 Nov 17;47(11):e403-e404. Epub 2020 Aug 17.

Divisions of, Division of, Dermatology, Tohoku Medical and Pharmaceutical University, Sendai, Japan.

Dermatol Ther 2021 Jan 13;34(1):e14631. Epub 2020 Dec 13.

Department of Dermatology, Venereology and Leprosy, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, India.

Dermoscopy as a diagnostic tool is attaining impetus in inflammatory dermatoses with the cumulative description of characteristic findings in most dermatoses obviating at times the need of biopsy. In this retrospective observational study, 20 histopathology confirmed cases each of pityriasis rosea (PR), guttate psoriasis (GP), and pityriasis lichenoides chronica (PLC) seen over a period of 3 years were included. Dermoscopy images were extracted from photography archives for evaluation and three lesions from each patient (60 lesions each) were analyzed. Read More

J Dermatol 2020 Dec 17;47(12):e430-e431. Epub 2020 Sep 17.

Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.

Cureus 2020 Jun 20;12(6):e8725. Epub 2020 Jun 20.

Dermatology, University of Nebraska Medical Center, Omaha, USA.

Pityriasis lichenoides et varioliformis acuta (PLEVA) is a rare cutaneous eruption of erythematous macules and papules distributed over the flexural surfaces and the trunk. Histopathologic analysis is useful in diagnosis, and dermoscopic findings have been described in several small case series. We present a case of a mid-20s female who was diagnosed with PLEVA based on clinical and histopathological findings, and we also demonstrate a unique dermoscopic finding. Read More

Indian Dermatol Online J 2020 May-Jun;11(3):477-478. Epub 2020 May 10.

Department of Dermatology and STD, KEM Medical College, Mumbai, Maharashtra, India.

J Dtsch Dermatol Ges 2020 Jul 12;18(7):758-760. Epub 2020 Jul 12.

Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Italy.

J Drugs Dermatol 2020 Mar;19(3):324-325

Pityriasis lichenoides is a scarce cutaneous disorder with unknown etiology. It contains a range of clinical manifestations including acute papular lesions that quickly grow into pseudo vesicles and central necrosis to small, scaling, benign-appearing papules.1,2. Read More

Eur J Dermatol 2020 Jun;30(3):317-318

Department of Dermatology, Jeonbuk National University, Jeonju, Republic of Korea.

J Drugs Dermatol 2020 May;19(5):560-561

Background: Pityriasis lichenoides chronica, a papulosquamous disorder often considered a subtype of pityriasis lichenoides. It is considered a clonal T-cell disorder, which may be associated with cutaneous T-cell lymphoma that may develops in response to foreign antigens.

Case Presentation: We present a 38-year-old male patient with ankylosing spondylitis who was on treatment with etanercept. Read More

Indian J Dermatol Venereol Leprol 2020 Jul-Aug;86(4):398-400

Department of Dermatology, Venereology and Leprosy, JSS Medical College, Mysore, Karnataka, India.

Clin Neurol Neurosurg 2020 08 5;195:105886. Epub 2020 May 5.

Department of Neurology, George Washington University, Washington, DC, United States; Department of Neurology, Veterans Affairs (VA) Multiple Sclerosis Centers of Excellence, Washington, DC, United States.

Korean J Fam Med 2020 May 21. Epub 2020 May 21.

Department of Dermatology, Hospital Raja Perempuan Zainab II, Kota Bahru, Malaysia.

Primary cutaneous lymphomas are rare diseases among the general population, and even rarer in children. Mycosis fungoides (MF) is the most commonly diagnosed form in childhood. Several atypical clinical variants of MF have been reported, and pityriasis lichenoides-like MF (PL-like MF) is a recently described subtype. Read More

Pediatr Dermatol 2020 Jul 30;37(4):710-712. Epub 2020 Apr 30.

Division of Paediatric Dermatology, Children's Hospital AUF DER BULT, Hannover, Germany.

Although the clinical presentations of patients with pityriasis lichenoides et varioliformis acuta (PLEVA) may vary, bullae are not usually part of the clinical spectrum. To date, only two other cases of a bullous variant of PLEVA with evidence of autoantibodies against hemidesmosomal antigens have been reported. The term PLEVA pemphigoides was suggested for this unique clinical, pathological and serological combination of both PLEVA and bullous pemphigoid. Read More

Australas J Dermatol 2020 Nov 20;61(4):e428-e430. Epub 2020 Apr 20.

Department of Dermatology, Saiseikai Central Hospital, Tokyo, Japan.

Dermatology 2021 27;237(2):230-235. Epub 2020 Mar 27.

Pediatric Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.

Background: Mycoplasma pneumoniae pneumonia is sometimes associated with skin or mucous membrane eruptions. Available reviews do not address the association of Chlamydophila pneumoniae pneumonia with skin eruptions. We therefore conducted a systematic review of the literature addressing this issue. Read More

Acta Derm Venereol 2020 Mar 18;100(6):adv00089. Epub 2020 Mar 18.

Service of Dermatology, General University Hospital of Alicante, C/ Pintor Baeza, 12, ES-03010 Alicante, Spain.

The aim of this prospective study in a phototherapy unit was to describe adverse events (AEs) associated with discontinuation of phototherapy in a clinical setting. A total of 872 included patients received 1,256 courses of phototherapy treatment: 76.9% narrow-band UVB (NBUVB); 9. Read More

Dermatol Ther 2020 05 30;33(3):e13311. Epub 2020 Mar 30.

Department of Dermatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.

Pityriasis lichenoides (PL) is an uncommon cutaneous disorder. Oral erythromycin is proposed to be effective in treating the disease. Here, we reported 16 pediatric patients with PL and systematically reviewed published literatures on erythromycin treatment response in pediatric PL patients, to observe the different treatment response to erythromycin in the pityriasis lichenoides chronica (PLC) and the pityriasis lichenoides et varioliformis acuta (PLEVA) groups. Read More

Dermatol Ther 2020 05 1;33(3):e13303. Epub 2020 Apr 1.

Department of Dermatology, Hospital San Juan de Dios, La Plata, Argentina.

An Bras Dermatol 2020 Mar - Apr;95(2):259-260. Epub 2020 Feb 19.

Department of Dermatology and Radiotherapy, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brazil. Electronic address:

Front Immunol 2020 21;11:280. Epub 2020 Feb 21.

Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Br J Dermatol 2020 12 10;183(6):1026-1032. Epub 2020 May 10.

Division of Dermatology, Department of Medicine, University of Toronto School of Medicine, Toronto, ON, Canada.

Background: Pityriasis lichenoides (PL) is a papulosquamous dermatosis affecting both children and adults, for which no standard treatment currently exists.

Objectives: To characterize different treatment options and develop an evidence-based treatment algorithm for PL.

Methods: A systematic search of published literature on PL treatments was performed on 23 December 2017 via the MEDLINE, Embase, CINAHL, CENTRAL, ClinicalTrials. Read More

Clin Dermatol 2019 Sep - Oct;37(5):561-579. Epub 2019 Jul 17.

Department of Dermatology, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania, USA.

White diseases are a heterogenous group characterized by hypopigmentation or depigmentation. Skin and eye color are determined by the number and size of melanosomes present. Melanin is produced by melanosomes in the melanocytes present within the epidermis of the skin, uvea, and retinal pigmented epithelium (RPE). Read More

Am J Dermatopathol 2020 Jan;42(1):1-10

Department of Dermatology, Hôpital Necker-Enfants Malades, Paris, France.

Introduction: Pityriasis lichenoides (PL) is an infrequent skin disorder. The clinical manifestations are usually specific enough for a reliable diagnosis, although the histopathological assessment of a biopsy is sometimes needed to differentiate between PL and a range of other diseases. The objectives of this study were to review cases of PL managed in our hospital, confirm the classical histopathological features of PL, and identify signs that may be of value in the diagnosis of PL. Read More