Golf ball sized lump protruding from arm/quarter sized lump; Pain/have been in terrible pain; Itch at the injection site; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE MASS (Golf ball sized lump protruding from arm/quarter sized lump), VACCINATION SITE PRURITUS (Itch at the injection site) and VACCINATION SITE PAIN (Pain/have been in terrible pain) in a 73-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 029L20A) for COVID-19 vaccination.     No medical history information was reported.     On 23-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 28-Jan-2021, the patient experienced VACCINATION SITE PRURITUS (Itch at the injection site). On an unknown date, the patient experienced VACCINATION SITE MASS (Golf ball sized lump protruding from arm/quarter sized lump) and VACCINATION SITE PAIN (Pain/have been in terrible pain). The patient was treated with PARACETAMOL (TYLENOL) at an unspecified dose and frequency. At the time of the report, VACCINATION SITE MASS (Golf ball sized lump protruding from arm/quarter sized lump), VACCINATION SITE PRURITUS (Itch at the injection site) and VACCINATION SITE PAIN (Pain/have been in terrible pain) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No relevant concomitant product use was reported.    Most recent FOLLOW-UP information incorporated above includes: On 23-Feb-2021: No specific follow-up information recorded. This case was initially received via an unknown source (no reference has been entered for a health authority or license partner) on 18-Feb-2021. The most recent information was received on 23-Feb-2021 and was forwarded to Moderna on 24-Feb-2021.    This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE MASS (Golf ball sized lump protruding from arm/quarter sized lump), VACCINATION SITE PRURITUS (Itch at the injection site) and VACCINATION SITE PAIN (Pain/have been in terrible pain) in a 73-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 029L20A) for COVID-19 vaccination.     No medical history information was reported.     On 23-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 28-Jan-2021, the patient experienced VACCINATION SITE PRURITUS (Itch at the injection site). On an unknown date, the patient experienced VACCINATION SITE MASS (Golf ball sized lump protruding from arm/quarter sized lump) and VACCINATION SITE PAIN (Pain/have been in terrible pain). The patient was treated with PARACETAMOL (TYLENOL) at an unspecified dose and frequency. At the time of the report, VACCINATION SITE MASS (Golf ball sized lump protruding from arm/quarter sized lump), VACCINATION SITE PRURITUS (Itch at the injection site) and VACCINATION SITE PAIN (Pain/have been in terrible pain) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No relevant concomitant product use was reported.    Most recent FOLLOW-UP information incorporated above includes: On 23-Feb-2021: No specific follow-up information recorded.