Yaumatei Dermatology Clinic, 12/F, Yaumatei Specialist Clinic (New Extension), 143 Battery Street, Yaumatei, Kowloon, Hong Kong An eleven-month-old boy presented with increasing number of yellowish papules on scalp, trunk and limbs soon after birth. Skin biopsy revealed juvenile xanthogranuloma. He was also found to have multiple café-au-lait macules. The clinical course, complications and asso...

We report two otherwise healthy patients with no prior history of thyroid cancer, who presented to us with a solitary scalp lump. Neuroimaging of both patients showed osteolytic lesions involving the cranium which were subjected to complete excision biopsy and cranioplasty. Histopathological examination revealed metastases from well differentiated follicular thyroid carcinoma (FTC). Subsequent ...

Mycosis fungoides (MF) is an uncommon primary cutaneous lymphoma with a wide spectrum of clinicopathological manifestations. Diagnosis can be difficult in its early stages given the considerable overlap with more common benign dermatoses. We report an unusual case of MF in a 52-year-old male presenting with psoriasiform plaques on the palms and the soles who rapidly developed additional lesions...

Nevus sebaceous is a hamartoma of the cutaneous structures that often presents at birth and typically involves the face and scalp. Nevus sebaceous is frequently complicated by the development of a variety of other benign or malignant neoplasms. The most frequently reported benign neoplasms are trichoblastoma and syringocystadenoma papilliferum. Malignant tumors are much less frequently observed...

Nevus sebaceus is a benign hamartoma of the epidermis, hair follicles, and sebaceous and apocrine glands. It typically appears as a yellow-orange to pink, finely papillomatous alopecic plaque that is often oval or linear. It usually presents at birth, preferentially affects the scalp and face, and is not uncommon, occurring in approximately 1 in 1,000 live births [1]. A recent study by Groesser...

A 17 year old girl presented with asymptomatic linear depressed groove involving the midline of the forehead region which was progressively increasing over the past 1 year. The lesion was slowly extending to the scalp which became a major concern to the patient. There was no history of trauma preceding the development of the lesion. On examination, an ivory sclerotic depressed linear lesion mai...

RATIONALE Primary cutaneous non-Hodgkin's lymphoma (NHL) is an uncommon entity, representing 10% of all extranodal NHLs. Among all cutaneous sites, the scalp is a rare site of representation. PATIENT CONCERNS A 92-year-old Chinese man visited our hospital with a multiple-nodular huge scalp mass on the right parieto-occipital regions. The mass was of 7-month duration and progressively enlargin...

Syringocystadenoma papilliferum (SCAP) is a rare, benign tumour with varied presentations that arises from the apocrine glands and at times can lead to a diagnostic dilemma. A 53-year-old male presented with a 40-year history of a scalp nodule and a recent 2-year change in its character, and a sanguinopurulent discharge. Examination revealed a 4 cm × 2 cm firm nodule upon left side of the scalp...

BACKGROUND Several risk factors are generally accepted to portend more aggressive behavior of cutaneous squamous cell carcinoma. These include tumor size, tumor depth, histologic subtype, location on the lip or ear, tumor arising in scar, recurrent tumor, and tumor demonstrating perineural invasion. Organ transplant recipients can have significant morbidity and mortality from squamous cell carc...

Dermatofibrosarcoma protuberans (DFSP) is a slow growing low-grade cutaneous sarcoma. Local recurrence after excision is common due to the poorly defined periphery that renders histological control of surgical margin difficult, Mohs micrographic surgery is the optimal method for treatment. A 41 years old male patient, who had a previous history of DFSP, came to our dermatology clinic for evalua...