The post-traumatic pseudolipoma (PTPL) is a unencapsulated proliferation of mature adipose tissue that develops after a local trauma. We report a case of a male child, who presented with a tumor on the left forearm which appeared weeks after a local blunt trauma. We perform a biopsy of the lesion and the diagnosis of post-traumatic pseudolipoma was established. This case exposes an example that PTPL can simulate liposarcoma clinically. In addition, both disorders are rarely reported in dermatological journals, which cause a poor knowledge about its clinical resemblances and differences by dermatologists.

Keywords: Forearm injuries; Lipoma; Liposarcoma; Neoplasms, post-traumatic

Nevus lipomatosus cutaneous superficialis is an uncommon dermatosis in which the adipose tissue is present ectopically in the dermis.This condition is clinically divided into two variants: classical and solitary.The first is characterized by soft, pedunculated, cerebriform, skin-colored or yellowish papules or nodules, mainly involving the pelvic region.The latter is observed as a solitary or sessile papule. Treatment with surgical excision is usually enough. Nevus lipomatosus cutaneous superficialis may be associated with other conditions such as multiple lipomas, as in our case.

Keywords: Nevus; Dermis;Adipocytes; Lipoma

INTRODUCTION: Dermatobia hominis is one of the main etiologic agents of furunculoid myiasis. It is more common in intertropical countries and induces the formation of a papule or nodule in the skin with a central orifice. When the lesion's diagnosis is not made or when the larva does not go out, it can progress to the formation of a tumor. We report a rare case of a lipoma-simulating lesion in the lower limb of a man living in the countryside. The etiological diagnosis was made exclusively through histopathological examination, which showed a cyst with exogenous material to the center, compatible with D. hominis, in a clear degradation process.

Keywords: Larva; Lipoma; Myiasis

Lipomas are frequent soft tissue tumors and can be found anywhere in the body; however, their location in hand is rare. They are called giants when they exceed 5 cm. In these cases, the differential diagnosis must be made with liposarcoma. These benign tumors must be characterized preoperatively with an imaging study, and their treatment is surgical. We present the case of a patient with a giant hand lipoma successfully treated with a modified Bruner incision approach.

Keywords: Lipoma; Liposarcoma; Neoplasms, adipose tissue; Hand