Cutaneous leiomyosarcoma is a rare soft tissue neoplasm of smooth muscle derivation which subdivided into cutaneous and subcutaneous form. The majority of former type occurs on the hair bearing surfaces of the extremities, particularly the lower extremities.We present a rare case of cutaneous leiomyosarcoma occurred on the SCALP of a 64 years old man with history of previous trauma (multiple burning due to his work, bakery). The Masson-trichrome and mc stains for vimentin, desmin, alpha 1-antitrypsin, and Smooth Muscle Antibody (SMA)were positive and cytokeratin and S-100 were negative. The case was a primary SCALP leiomyosarcoma in which other spindle cell sarcomas and carcinomas were excluded.

A 45-year-old man presented with multiple ulcerated and erythematous nodules on his SCALP. The first lesion appeared on his vertex as an erythematous plaque five years ago and there was gradual increase in size and number of the lesions ever since.He was otherwise healthy.Physical examination showed multiple erythematous nodules, some were crusted, on the vertex (Fig.1). No lymphadenopathy was detected and general examination was unremarkable.The SCALP lesion was biopsied and immunohistochemical staining was performed on the specimen.What is your diagnosis.

Lipedematous SCALP (LS) and Lipedematous Alopecia (LA) are uncommon disorders of unknown etiology, pathogenesis and treatment. They are characterized by thickening of the subcutaneous layer of the SCALP and a boggy SCALP on palpation. Also, hair loss or shortening of hair is seen in LA. In this report, we describe LS in a 42-year-old woman presented with a diffuse thickened and spongy SCALP. To date, only 10 cases of LSand 18 cases of LAhave been reported and we report the 11th case of LS but it seems to be more prevalent than reported.

Dermatofibrosarcoma protuberans (DFSP) is a malignant, slowgrowing, locally aggressive tumor of the skin with a high rate of recurrence. It is a very uncommon malignant skin tumor, especially in the head and neck area (10-15% of cases). This case report discusses a rare case of SCALP DFSP.

Apocrine nevus is a rare benign tumor of which only 9 cases have been reported in the literature. The apocrine nevus is seen mostly in the areas where the apocine glands are normally distributed such as axillae, head and neck. Our case was a 16 - year old girl who referred with a verrucous erythematous plaque over right parietal side of the SCALP. The patient had the plaque since birth with partial growth after puberty. Histopathologic study showed mature apocrine glands located in the reticular and papillary dermis with epidermal papillomatosis and acanthosis.      

Eccrine porocarcinoma is a rare malignant adnexal tumor of ductal portion of eccrine sweat gland. It occurs commonly in the lower extremities and rarely in SCALP, face, ear, trunk and upper extremities. This survey presents a classic case of eccrine porocarcinoma of SCALP in a 58 yr old male patient, presenting as cauliflower like growth over parietal aspect of SCALP.